Optimization Design of Rare Earth Permanent Magnet Synchronous Motors

Optimization Design of Rare Earth Permanent Magnet Synchronous Motors
　　Rare earth permanent magnet synchronous motors(REPMSM) have brilliant market future with features of high density, excellent efficiency, low operation cost, efficiency of conserving energy and good reliability. How to meet a motor’s technical requirement and reduce cost is a target of designers and enterprises. According to characters of REPMSM, this paper aims at optimization design and developing a CAD system for REPMSM.The actuality and development of electric machine CAD technique and optimization design are introduced. The performance peculiarity and design method of REPMSM are analyzed. Some key problems are discussed including Special shape NdFeB magnets establishing a motor mathematical model, choosing an optimization algorithm, disposal of discrete variables and interface software part between motor design computing program and optimization program, and so on.
　　A genetic algorithm(GA) is applied to optimization design of REPMSM. The result of an optimization example reveals that GA is a wise choice to optimization design of REPMSM.A CAD system of REPMSM is developed by Borland C++ Builder 6, which can run on the platform of Windows. The CAD system based on engineering database is developed according to software engineering ideas of modularization and integration. The software gathers the function of analysis Special shape NdFeB magnets design, optimization design and some aided function forming into a whole motor CAD software. The paper introduces the function of every part of the CAD system. How database technique is applied to this CAD software is stated. The data storage and fetch with http://www.999magnet.com/ automatic input and output file formed are realized in the system by database management system. The result of computing instances shows that the CAD system can achieve the goal to reduce product cost, improve product quality and shorten period of development.

稀土对ZA43合金组织及性能的影响

稀土对ZA43合金组织及性能的影响
　　The zinc alloy is the non-ferrous metal that it was added proper aluminum, copper and other trace elements as Mg、Mn、Si、B、Rare Earth(RE) on the basis of Zinc. The alloy is a supersaturated solid solution and the function of solution strengthening is obvious .The high aluminum zinc alloy is the new cast non-ferrous alloy developing almost 20 years fastly.This alloy is a ideal substitute of copper for its cheapness and good at mechanical、antiwear properties .Its main character is make antifriction parts instead of copper. That substitute Zinc for Copper is very important in our country’s resource and policy. It will be a new pattern of using non-ferrous alloy in the world. However, presently,ZA43 alloy of researching is still exist some problems just like lower strength and hardness、Segment neodymium magnets antiwear is not good which is not satisfy some special usage properties of alloy.In the paper, chemical segregation、microstructure、the being way of rare earth in alloy、mechanical and antiwear properties of the alloy was researched by adding rare earth to modifying ZA43 alloy.
　　The results show that:1. Aluminum content is 40.70%、41.13% in feeding and head of ZA43 cast sample respectively and 41.22%、41.26% which was added rare earth by 0.15%.It indicates that the ZA43 what was modified by adding proper RE can efficiently resist the growth of a dendrite crystal、optimize microstructure and refine grains.2. The http://www.999magnet.com/ being way of mixture rare earth by 0.15% in cast structure of modification ZA43 alloy was studied through SEM-EPMA and structure of every phase in sample was analyzed. It is found that the rare earth distributes at the grain boundary of alloy and exists with solution and rare earth compound. There is no RE in center and rim of branch grain but lower content at the rim of a phase and no inηphase .It indicates that it will diminish chemical segregation and refine structure of modification alloy with adding modification reasonably.3. Segment neodymium magnets Mechanical properties experiment reveal that hardness、tensile strength and coefficient of elongation of ZA43 alloy was improved while rare earth modification is the midst of 0.05-0.15% and the synthetic properties is the best by 0.15%.But, when it is beyond 0.15%, the tensile strength shows trend of reducing as the content of the rare earth increasing. With the content of rare earth increasing, wear of ZA43 alloy reducing. So does the friction parameterμ.when rare earth is beyond 0.05%,the properties of friction and wear of the alloy is better than ZQSn6-6-3.So, The alloy can instead of copper alloy absolutely as a good substitute and will obtain largely economic and social efficiency using the substitute zinc for copper to making antiwear parts.

The Study of Interaction among the Rare Earth、Drug and Biomacromolecule with Fluorescence Spectrophptometry and Its Application

The Study of Interaction among the Rare Earth、Drug and Biomacromolecule with Fluorescence Spectrophptometry and Its Application
　　Because of unique superiority of the rare earth fluorescence probe technology, it has been applied widely in the medicine analysis and the biological macro-molecule analysis aspect. In this paper, we established the determination methods for quinolones and the serum albumin using the rare earth fluorescence probe, and studied the interaction Segment neodymium magnets among drug and biomacromoleccule using fluorescence spectroscopy.
　　We have done the following work.(1)Used terbium (III) or europium (III) as fluorescents probe, we proposed a simple, rapid and sensitive new method for the determination of trace quinolones. Intermolecular energy transfer occurred in quinolones - terbium (III) or europium (III) complex and the fluorescence of terbium (III) or europium ( III) was sensitized by quinolones. Based on this fluoremetric methods for the determination of quinolones in pharmaceutical preparations were proposed and the determination limits achieved the ng level.Most biological fluids are fluorescent and provide high background fluorescence, which overlap the spectra of quinolone in most circumstance. Segment neodymium magnets However these spectra overlaps were successfully resolved by applying rare earth ion fluoresent probe techniques. So the fluoremetric method for the determination of the quinolones in human urine without tedious pre-separation was proposed. Proposed methods are simple, accurate and sensitive, and were applied satisfactorily to the determination of quinolones in its samples and the results

Characteristics Analysis and Optimum Design of Rare Earth Giant Magnetostrictive Transducer

Characteristics Analysis and Optimum Design of Rare Earth Giant Magnetostrictive Transducer
　　Rare earth giant magnetostrictive transducer is the ultrasonic generator for non-destructive testing. Its performance has important influence on the testing result.The vibration frequency and magnetic distribution of the transducer have been computed with the finite element method. The initial stress, electrical parameters and geometric dimensions have been optimized, Segment neodymium magnets which provides a theoretical guidance for the design of magnetostrictive transducer.Equivalent circuit method is a classical method used to calculate vertical vibration of piezoelectric transducer. Equivalent circuit method and Fourier Transform are used to calculate and analyze a GMM http://www.999magnet.com/ transducer in this research.
　　On the basis of this research, a software package is developed for a GMM transducer design and optimization. After some structural and material parameters are inputted, characteristics of the transducer include data and curve will be given. A GMM transducer is optimized according to the software.A GMM transducer is developed is this research. The frequency Segment neodymium magnets response of the transducer and the real-time ultrasonic waveform of the transducer are measured. Compared with the experimental results, the calculated results are proved to be correct.

Slot-type Design for 10KA Rare Earth Molten Salt Electrolysis Cell

Slot-type Design for 10KA Rare Earth Molten Salt Electrolysis Cell
　　Energy-saving and Consumption-reducing increase its market competition ability for metallurgical industry along with the development of the rare earth market. We need develop a kind of new structural electrolysis cell urgently to adapt to energy-saving and consumption-reducing. The methods of research and development in aluminum reduction cell are used as a source of reference to exploit a new bottom- cathode-structure rare earth electrolysis cell in the article.Firstly, physical model of the 10KA bottom-liquid cathode-structure rare earth electrolysis cell is determined through Alnico magnets referring to many documents .The contour of the electrolysis cell is cylinder. The anode is located in the center of electrolysis cell with the radius of 58 centimeters. Liquid neodymium at the bottom of the electrolysis cell is used as cathode. No sink is installed in the electrolysis cell.Secondly, mathematical model about Electric field of electrolysis cell is established.
　　Electric field for bottom- cathode-structure electrolysis cell with different cathode radius and polar distance is simulated through the MATLAB computer language. The results show that the isolines of the voltage are parallel and current intensity is well distributed between cathode and anticathode, it makes an assurance for electrolysis steadily.Electrolysis cell with different cathode radius and different polar distance correspond different melt voltage. Melt voltage http://www.999magnet.com/ of all electrolysis cells is lower than traditional electrolytic cell’s except that the polar distance is 14 cm and the cathode radius is 60 cm.Thirdly, heat balance for different electrolysis cell with different cathode radius and different polar distance is calculated. The results show that the output and input of the heat are balanced when the polar distance are 10 cm, 11 cm, 12 cm and 13 cm corresponds the cathode radius is 62 cm, 63 cm, 64 cm and 65 cm. The electrolytic cell with polar distance is 13 cm and cathode radius is 65 cm is better considering many factors.Temperature field of electrolysis cell determined finally is simulated using the Alnico magnets ANSYS Thermal Electric field module. The results show that the temperature distribution in the electrolysis cell which the polar distance is 64 cm and the polar distance is 12 cm is reasonable. The highest temperature 1072℃appears in the electrolysis region between cathode and anticathode. The lowest temperature 953℃appears at the top of the electrolysis cell near the edge. The electrolysis cell is determined which The polar distance and the polar distance is 64cm and 12cm considering the advantages and disadvantages about gaseous emission and operation whether is convenient, the electrolyte whether is polluted easily, etc.This Project with Direction and practicability not only make an exploration in theory, an innovation in practice but also provide a basis for production.

Study on Effect of Rare Earth Elements Nd3+ on Adventitious Roots Regeneration of Dendrobium Densiflorum Lindl. ex Wall.

Study on Effect of Rare Earth Elements Nd3+ on Adventitious Roots Regeneration of Dendrobium Densiflorum Lindl. ex Wall.
　　Rare earth elements (REEs) have important biological effects even though they are not the essential elements for the organism. The present results showed that the REEs at a lower concentration stimulate germination of seeding, promote root growth, increase root length and induce adventitious rooting. The effects of Nd3+ on adventitious rooting of Dendrobium densiflorum shoot cuttings were studied to explore the mechanism of effects of REEs on plant growth.Addition of Nd(NO3)3 (5μmol/L) to the culture medium promoted the adventitious rooting of D. densiflorum: significantly increased the rooting percentage, which was enhanced by 40.0% and 32.6% in contrast to the Magnetic lifter control, and also increased the lengths of adventitious roots and the number of roots per plant, at the 18 and 30 days after inoculation (DAI).Histological modifications occurring during the developmental process were also observed. The root primordium was formed between the 3 to 6 DAI both in the treatment and the control. Endogenous levels of IAA and total cytokinins (CTks) (iP+ iPR and ZT+ZR) were quantified by means of enzyme-linked immunosorbent assay (ELISA). At the 6 DAI. a marked increase in the level of auxin (Indole-3-acetic acid, IAA) of the rooting zones of cuttings was detected and this coincided with the beginning of root initiation in the root cuttings. Furthermore, this increase was 458.3% higher in the treatment. IAA/ total CTKs ratio of the 5μmol/L Nd3+ treatment in the rooting zones of cuttings were much higher than those of the control at the 6 DAI throughout the process of the adventitious root initiation, but had no significant differences between them on the other days.
　　These suggested that IAA and IAA/total CTKs ratio have played important roles in the root primordium development, and Nd3+ (5μmol/L) promote the the adventitious rooting by increasing the level of IAA and IAA/ CTKs ratio in the adventitious root initiation phase.Although IAA oxidase activity (IAAox) showed the same activity changes in the Nd3+ treatment as in the control, and there was no significant difference between them in the process of adventitious Magnetic lifter rooting of D. densiflorum, the IAA level of the Nd3+ treatment was much higher than that of the control at the 6 DAI. These results suggested that the enhanced accumulation of the endogenous IAA by Nd3+ should not be related to inhibition of IAA decomposition by IAAox, and may be related to promotion of IAA synthesis or translocation of IAA. The activity of cytokinins oxidase (CKX) was usually induced by CTKs. In this paper, compared to the control, the total CTKs level was higher in the Nd3+ treatment at the 6 DAI. and the CKX activity was also higher in the Nd3+ treatment correspondingly, while the http://www.999magnet.com/ ratio of IAA/total CTKs in the Nd3+ treatment was still higher than that of the control, which would favor root primordium formation. Poxidase (POD) is relevant to adventitious rooting and development. During the whole process of adventitious rooting, POD activity of the treatment was much higher than that of the control.Besides, the Nd3+ enhanced the GSH/GSSG ratio in the process of adventitious rooting, but did not affect DHA/ASC ratio significantly in this paper. These suggest that the promotion of Nd3+ on adventitious rooting of D. densiflorum is correlative with the level of redox status.

盈江稀土矿提钪选矿试验研究

盈江稀土矿提钪选矿试验研究
　　Yingjiang rare earth mine is a weathering granite regolith ore bed containing Tantalum-Niobium, and a mining and ore dressing plant of 200t/day has been built there. Due to the low content of Tantalum-Niobium and small granularity, the plant has not yet selected qualified Tantalum-Niobium Concentrate. Later, in the test, the Geological Bureau Laboratory Center found that the mine contain high-value Scandium, Yttrium, ytterbium, and other rare earth minerals. In this study, we carry out the identification of minerals and rocks upon Yingjiang Tantalum-Niobium mine to determine its Magnetic lifter minerals and the ore construction.
　　Through the spectrum analysis and chemical analysis upon Yingjiang rare earth minerals, we found that the mine contain 0.00489% scattered elements Sc. Scandium is a rare earth element of excellent physical and chemical properties, expensive-price, and very extensive applications, such as source material, Non-ferrous alloy, precision ceramic, solid electrolyte, catalyst, laser crystal, semiconductor, Superconducting materials and other major materials of hi-tech products. Therefore, the development of Scandium resources in Yingjiang rare earth minerals is of great social and economic benefits and great significance.In this study, we made the Process Mineralogy Research upon Yingjiang rare earth minerals, separated and selected the main ore minerals containing Sc,such as biotite, tremolite, ilmenite and sphenem, and gangue minerals, such as quartz, and feldspar, from the Yingjiang rare earth, tested and determined their properties, and found their proportion, magneticity and electricity differ greatly.
　　The election can be expected to abandon gangue minerals, the magnetic separation to get the concentrate in the iron ore, and the electric way to elect ilmenite sphene with lower scandium and get high quality scandium concentrate.In the ore particle size analysis, we knew that the sample size distribution is concentrated in a size of-3mm+0.125mm, and the yield accounts for 75.75%. In the ore, Sc, Y, Yb, Ta2O5,Nb2O5 metal rates vary, Ta,Nb,Yb,Sc in the particle content do not show apparent regularity, and Y is decreases with the size.In the Ore magnetic analysis, when the tensity is 140～212KA/m, the magnetite metal ore and titan magnetite metal ore can be selected with the yield of 8.27% and the scandium volume of 14.14; when the is changed to 574KA/m, Ilmenite can be Magnetic lifter isolated with the yield of 2.15% and the scandium volume of 108g/t; when the is increased up to 900KA/m, the black mica can be separated, with the Sc volume of 317.13g/t,the yield of 5.17%, and the metal distribution rate of 33.53%.
　　Through the dissociation determination of the ilmenite, biotite and tremolite,we get that a high grade concentrate Sc can only be received by the fine selection.From the grinding grade test, gravity election test, magnetic separation tests and electric test, we get that the Scandium Concentrate with grade of 378.24g/t can be received by weak magnetic-strong magnetic-gravity election-eletric election process.Our researcher did the flow experiment and expanded test with http://www.999magnet.com/ weak magnetic-strong magnetic-gravity election-eletric election process to get Sc Concentrate with grade of 316g/t and yield of 71.34, and they are very close to the small test results. This can approve that the test is successful, and the conditions and equipment are correct. The success of the project has laid a technological basis for the development of Yingjiang rare earth mine.

Influence of Rear-earth Elements Doping on Nano-TiO2 Photocatalysis Performance

Influence of Rear-earth Elements Doping on Nano-TiO2 Photocatalysis Performance
　　In this thesis, Cyclic Voltammetry and ESR method were adopted to explore electrochemical behaviors of TiO2 doped by rear-earth elements and variation regularity of radical signal. No new phases were found in XRD diagram after doping of rare-earth elements. The measure of Cyclic Voltammetry illustrated that the signal optimization subsequence is Nd>Sm>La>Ce>TiO2, which basically follows the subsequence of oxidizability. Nd doping is better than other elements doping which is major because of strong basicity center on the surface of the Nd2O3, Neodymium Magnets superficial layer dope energy lever and oxygen anion (O2) which is an important intermediate created when TiO2 produces the hydroxyl radical and is the important factor for making rear-earth doping own catalysis. The test of ESR indicated that in dark the subsequence of signal of the hydroxyl free radical after rear-earth doping is consistent with that of measure of Cyclic Voltammetry.
　　The ESR showed that signals of the hydroxyi free radical in ultraviolet light and visible light are weaker than that in dark, which is because of the different surface between rear-earth doping and TiO2 with no rear-earth doping and that the increasing of light intensity enhanced the consumption velocity of·OH, resulting in the signal of·OH in ESR weak.Adopting the clay as carrier, active carbon as aided sorption agent and rear-earth doped TiO2 as resources of photo catalysis Neodymium Magnets to degradate dye wastewater.The effect of the doping on photocatalysis were studied. It is found that the clay with low cost could solve the carrier problem and extremely enhance the TiO2 photo catalysis behavior owing to active carbon and bivalent Mn. Ultraviolet visible diffused reflection measure showed that composite carrier widened TiO2 response range towards light, establishing the favorable foundation for photo catalysis reaction. The test of ESR illustrated that active carbon involved the bivalent Mn extrication. And experiment approved that bivalent Mn can participate in the Fenton-typed reaction, promoting the formation of hydroxyl free radical and superoxide free radical which http://www.999magnet.com/ increased the photo catalysis of the composite carrier. The determination of absorbance in the degradated dye solution indicated that the composite carrier behaved very well during degradating the dye solution. Ultraviolet visible light absorption indicated that the effect of composite carrier on dye wastewater is not only absorption but also photo catalysis degradation.

Study on the Evolvement of Solidification Microstructure of Magnesium-Alnminum System Alloys under Rare Earth Nd Modification Condition

Study on the Evolvement of Solidification Microstructure of Magnesium-Alnminum System Alloys under Rare Earth Nd Modification Condition
　　In order to improve the solidification structure of magnesium(Mg)-aluminum(Al) system alloys, enhance their mechanical properties, and provide some reference to the study of strengthening and toughening Mg-Al alloy, the effect of adding rare earth Nd to the evolution of Mg-Al alloy’s solidification structure was studied in this article. The microstructure was analyzed by optical microscope and scanning electron microscopy(SEM), compositions and microzone composition of phases were analyzed by energy dispersive spectrometry(EDS), struture and compositions of magnet lifter every phases in the Mg-Al alloys were analyzed by X-ray diffraction (XRD). Specially studied the type transition and pattern character of precipitated phase in the solidification microstructure of the modified Mg-Al alloys in which the content of Al is approaching the composition of eutectic. The result indicated that:(1) The change law of Mg-Al alloys’organization is approximately same before and after the alloys modified,it was that the amount ofα-Mg increased and the amount of eutectic decreased accordingly as the increasing of aluminum content. But corresponds to each ingredient organization, the rule is different before and after the alloys modified.
　　To the low aluminum content alloy, the eutectic organization’s continuity reduced obviously, which in the crystal boundary of organization after modifying, the quantity of it reduced, and the primaryαdendrite’s branch became advanced.(2) The modification of Nd made a large number of dendrite appearing in the solidification microstructure of the high Al content(about 33%Al) Mg-Al alloys;In the range of hypoeutectic component, theαdendrite precipitated first. As the Al content gradually increasing and approaching the eutectic point, theβhalo appeared around theαdendrite magnet lifter and become thicken continuously, the amount ofαdendrite decreased, and then theβhalo changed intoβdendrite, the amount of which increased and whose branch became advanced. The result of Nd modification made the solidification microstructure of Mg-Al alloy approaching the eutectic point changed greatly, which changed from typical unmodified symbiotic eutectic toαdendrite,βdendrite and symbiotic eutectic concomitant structure after modification.
　　(3) From the thickest of step permanent mould to the middle of step permanent mould to the thinnest of step permanent mould to graphite mould, as the cooling rate enhanced, crystal grain of Mg-Al alloy became finer gradually, phases in the organization distributed uniform, and the quantity of eutectic increased gradually.(4) Three factors of the aluminum content, the cooling rate and the rare earth Nd modification effect toα-Mg crystal grain size mutually, and their http://www.999magnet.com/ function superposed. Among them, the enhancement of cooling rate and the increase of aluminum content could minish the crystal size, adding of the rare earth Nd element caused the crystal grain branching to be developed, the crystal grain size increased.

Construction of Luminescent Rare Earth Covalently Bonded Hybrid Materials by Modifying Bridged Molecules

Construction of Luminescent Rare Earth Covalently Bonded Hybrid Materials by Modifying Bridged Molecules
　　The main aim of this paper is to develop novel Organic-Inorganic hybrid luminescent materials with improved luminescent properties which can be used as high performed luminescent materials.In the first part of this paper, the study mainly concentrated on the Ball Neodymium Magnets syntheses of organic-inorganic molecular-based hybrid luminescent materials with the two components equipped with covalent bonds.
　　The organic components (aromatic acids or (3-diketone) which can sensitize rare earth ions fluorescence were modified by coupling agents and then the organic monomers with double reactivity were obtained. It is summarized that antenna effect existed between double functional molecules and rare earth ions and enhanced luminescence of the hybrids http://www.chinamagnets.biz/ which are compared with common physical mixture were obtained. Furthermore, the increase of rare earth concentration was enormous. It is the first time to observe a large amount of chains-like structures probably caused by crystal growth in the SEM graphs of 4-ethoxy benzoic acid.In the second part of this paper, the study mainly concentrated on the syntheses of luminescent materials with covalently bonded mesoporous host. And characterization of the materials by XRD, N2 adsorption/desorption and SEM revealed high crystallinity, Ball Neodymium Magnets  uniformity in the mesopore structure, and a high surface area. Additionally, β-diketone molecule with high energy transfer efficiency was firstly grafted by cross-linking agent and luminescent materials with covalently bonded mesoporous host were obtained by using it to modify MCM-41. And various experimental data indicated that it can heavily strengthen the photo- or thermal stability of complexes to introduce β-diketone molecules into MCM-41.

Study on Functional Rare Earth Containing Polymer-Clay Composites

Study on Functional Rare Earth Containing Polymer-Clay Composites
　　In this study, three types of copolymer modified Montmorillonites( Eu(Phen)(BA)2AA-co-MBDAC ) -MMT, ( MBDAC-co-4-VP ) -MMT, andEu(Phen)(BA)2AA-co- (MBDAC — MMT) were synthesized and characterizedby IR, XRD, DTA-TG and fluorescence spectrometer etc.
　　The results arepresented as follows:(1) The fluorescent property analysis show that the Montmorillonites modified with rare earth polymers strong magnets have preferably fluorescent emission at 615nm, while the rare earth polymers exhibit most strong emission when the molar ratio of Eu(Phen)(BA)2AA to MBDAC is 1/4. (2) The montmorillonites modified with oligomeric quaternary ammonium (MBDAC-co-4-VP) were prepared through cation exchange . Fluorescent properties of the modified montmorillonites and the oligomeric quaternary http://www.chinamagnets.biz/ ammonium were studied. The results show that the fluorescent properties of the copolymer can be controlled by altering the ratios of the monomers.

硬质合金在烟机配件上的应用研究

硬质合金在烟机配件上的应用研究
　　Tobacco machinery usually work at high speed , so some of the tobacco machinery accessories must have good abrasiveness.Compare with other metallic materials, cemented carbide are of better abrasiveness and the surface of cemented carbide accessories are more smooth. For its excellent properties , cemented carbide are widely used in tobacco machinery.In this research, we choose the right sort of cemented carbide firstly .Then we devise the molding and sintering technics, neodymium rare earth magnets also ascertain technical parameters of molding and sintering.If cemented carbide has good abrasiveness, it is hard for cemented carbide accessory’s machining, because the hardness of the material will be high and the material are brittleness. The influence of additive on the properties of cemented carbide has been studied, we added rare-earth oxide such as Y2O3, CeO2 La2O3 into WC-Co powder in order to improve the properties of cemented carbide, especially the abrasiveness.
　　The result show that rare-earth oxide allow for substantially improving the abrasiveness of the material, the hardness are also improved but not very remarkable.The result is that if we add 1. 2% CeO2. into YG6X powder, the property of material will be better than which we didn’t add rare-earth oxide, some parameters of this cemented carbide are as below:neodymium rare earth magnets Density:14. 293 g/cm3—14.361g/cm3;Hardness :88HRA90HRA;Cubage abrasion:0. 613×10-30.441×10-3cm3The transformation of structure after added rare-earth oxide are analyzed by XRD、 SEM and EDS , the result show that the rare-earth oxide disintegrated the WC grain size, the influence of rare-earth oxide on WC grain size in cemented carbide is decided by two finely http://www.chinamagnets.biz/ disintegrated role and one precipitate growth role;also rare-earth oxide improved Co phase. Thus the properties of cemented carbide are improved.

Sythesis, Characterization and Studies on Fluorescence Property of Rare Earth with Complexes Phenoxy Acetic Acid and 1,10-Phenanthroline

Sythesis, Characterization and Studies on Fluorescence Property of Rare Earth with Complexes Phenoxy Acetic Acid and 1,10-Phenanthroline
　　Two series of ten solid complexes of rare earth chloride and eight different proportional co-doped solid complexes(Tb3+:Y3+) with phenoxyacetic acid and 1,10-phenanthroline have been synthesized and characterized.Elemental analysis,rare earth coordination titration and TG-DTA studies show that the complexes have the composition of RE(POA) Block Neodymium magnets aphen·1/2H2O (RE3+=Eu3+,Tb3+,Sm3+,Dy3+);Tb0.5Ln0.5(POA)3phen·1/2H2O(Ln3+=La3+、Y3+、Gd3+);Eu0.5Y0.5(POA)3phen·1/2H2O;Eu0.5La0.5(POA)3phen·1/2H2O; Eu0.5Gd0.5(POA)3phen·1/2H2O;(Tbx:Yy)(POA)3phen·1/2H2O(0.10:0.90;0.20:0.80; 0.30:0.70;0.40:0.60;0.60:0.40;0.70:0.30;0.80:0.20;0.90:0.10).The molar conductivity indicates that all the complexes are none-lectrolyte;IR http://www.999magnet.com/ spectra and 1HNMR spectra show that the ligands coordinate with RE3+ ions though the oxygen atoms of phenoxyacetic acid and phenoxy,and two nitrogen atoms of 1,10-phenanthroline. Flourescence spectra show that the Block Neodymium magnets fluorescence intensity of the series Tb3+ complexes are much higher than of the Eu3+ complexes.However,Flourescence lifetime shows that the decay time of Eu3+ complexes are longer than that of the series of Tb3+ complexes;The strongest fluorescence intensity was studied in this article according to different proportional doped rare earth ions.

Preparation and Optical Properties of Rare-Earth Doped Alpha-Sialon Transparent Ceramics

Preparation and Optical Properties of Rare-Earth Doped Alpha-Sialon Transparent Ceramics
　　α-sialon ceramics doped with various rare-earth were prepared by hot-pressing sintering. Phase components and microstructure were analysized by X-ray diffraction, scanning electron microscopy, and transmission electron microscopy. Optical transmissions properties in wave number of 200-5000 were studied. The effects of rare earth and the sialon composition on the transmittance were also analysized. The fluorescence property and luminescence methanism in the Eu1010E2 material was discussed.The experimental results indicated all the samples reached full densification by hot-pressing at 1900℃for 60 min under 25MPa uniaxial pressure.
　　The phase components changed with the rare earth dopants in the sialons which have the same composition as Re0.33Si10Al2ON15. Pureα-sialon Special shape NdFeB magnets  were obtained in the YbNd, and YbY doped compositions while sameβ-sialon phase together with a small amount of other crystalline phases was detected in the Nd, Eu, and LuSc sialons. Futhermore, AlN polytypoid were also observed in the LuSc and http://www.999magnet.com/ Eu sialons. The phase assemblages changed systematically with compositions in the Y-sialon system. The boundary line composition yielded pureα-sialon, on the contrary both Y1510E2 and Y1515E2 had some M’.β-sialon phase were also detected in the Y1515E2 material.Experimental results showed that all the ceramics had optical transmission to some degree in the wavelength rang from 200-5000nm. YbNd and YbY sialons had high transmittance up to 73.46% and 73.19% respectively while LuSc sialon could only get maximum transmittance of 20.21%. Study in the Y-sialon system indicated that the Y1510E2 sialon with high N and low O concentration Special shape NdFeB magnets had better transmittance than the Y1015E2 sialon with low N and high O concentration. Microstructure observation by SEM and TEM showed that phase components, grains morphologies, and component of the secondary phases had significant effects on the mechanical and optical properties.The luminescent test indicateded the existence of only one wide emit peak around 509nm in Eu1010E2 material. The Eu3+ trapped in theα-sialon lattice could not show luminescence effect. A large amout of Eu2+ in theβ-sialon and S phase which was reduced from during hot-pressing exhibited luminesce corresponding to the 5d→4f electron transition when they were exited by laser light.

稀土Ce对Sn基无铅焊料的组织、性能及界面影响

稀土Ce对Sn基无铅焊料的组织、性能及界面影响
　　Sn-Pb solders have been widely used in electronic packaging industry.This solder and the alloys developed with it have long provided and continue to provide many benefits, such as low cost,ease of handling,low melting temperatures,ductility, and excellent wetting on several substrates.However,in respect of environmental and health concerns,with the ever-increasing awareness of the toxicity of lead,significant pressure has been put on the electronics industry to get the Pb-free solder.Trace rare earth element Ce were added into Sn-3.0Ag-0.5Cu、Sn-7Ag-10Sb and Sn-3.1Ag-8.0Bi-2.1Cu-1.7In solders aiming at examining the effect of different amount of rare earth on the physical properties,spreading property,corrosion p roperty and mechanical properties of the solders,the effect of rare earth on the microstructure was also investigated.The results showed that the trace elements are beneficial to the properties of the solder Pb-free.The content of rare earth element h ad a slight Alnico magnets effect on the resistivity, corrosion and melting point.Trace rare earth element improved the spreading area.With the increase of rare earth element content,the microstructure of the solder was from fir-tree crystal to equiaxed crystal and refined.
　　The strength reach the best. http://www.999magnet.com/   According to the testing on the physical,spreading and mechanical properties,the most suitable content of rare earth in the Pb-free solders is 0.3wt%.During soldering,the solder alloy reacts with the substrate to form intermetallic compounds at the joint interface.It is desirable to achieve a good metallurgical bond. However,excessive intermetallic compound growth may have a deleterious effect.In other words,the thick intermetallic growth degrades interface integrity,owing to the brittle nature of intermetallic compounds and also the Alnico magnets mismatches in physical properties such as thermal expansion coefficient and elastic modulus.Therefore,it is necessary to understand the factors that control the kinetics of interfacial reaction.Therefore,the objective of this study focuses on the kinetics of the intermetallic compound formation behavior of Sn-3.0Ag-0.5Cu、Sn-7Ag-10Sb and Sn-3.1Ag-8.0Bi-2.1Cu-1.7In solders with addition 0.3wt%rare earth element was investigated for Cu-substrate after soldered.the results show that,The adding of rare earth element can be helpful to reduce the Intermetallic compound in solders.Adding the rare earth element Ce is the best to depress the growth of the intermetallic compound.

Thermodynamic Optimization and Calculation of Phase Diagrams Related to the Rare Earth Halides with the Alkali Halides or Alkaline Halides

Thermodynamic Optimization and Calculation of Phase Diagrams Related to the Rare Earth Halides with the Alkali Halides or Alkaline Halides
　　By using CALPHAD (Computer Coupling of Thermochemistry and Phase Diagram) technique the optimization and calculation of the binary systems related to the rare earth halide were carried out. According to the characters of stronger interactivities of the rare earth halide systems, the new modified quasichemical model in the pair-approximation for short-range ordering developed by A. D. Pelton et al was used as basic theory to optimize and calculate this kind of phase diagrams by rational analysis. Based on some databases and literature data, several programs Magnetic lifter were made separately to optimize and calculate the binary systems of rare earth trichlorides and alkali chlorides.
　　For the first time the model was applied into the molten salts systems, and through optimization and calculation, we get the thermodynamic http://www.999magnet.com/ properties and optical self-consistent phase diagrams of those binary systems such as EuCl3-MCl (M= Na, K, Rb, Cs), GdCl3-MCl (M= Na, K, Rb, Cs), DyCl3-CaCl2and DyCl3-KCl, EuCl3-CaCl2.According to the theory of self-consistence between thermodynamic parameters or functions, some thermodynamic models were chosen and constructed, all data from measured phase equilibria and experimental integral properties scattered in literature were put together to check their consistency and to optimize and calculate these systems. Magnetic lifter Finally the thermodynamic description of the studied systems was obtained, which is reasonable, reliable and self-consistent. Through the analysis and comparison between the calculated and experimental phase diagrams, some experimental phase diagrams were improved. We compared the experimental data of binary

The Research on the High Aluminum Zinc Based Alloy Intensified by Rare Earth Oxide

The Research on the High Aluminum Zinc Based Alloy Intensified by Rare Earth Oxide
　　Zinc Aluminium alloys show a preferable application foreground and economic predominance in engineering because of low cost and favorable using and machining properties.But their applications have been limited because of poor high temperature mechanical properties and corrosion resistance . Therefore,the purpose of this research is to find new methods and new approaches to improve the microstructure and properties of ZA alloys.By adding rare earth oxide to make ZA alloys composites , increasing the aluminum content of zinc based alloys , which can improve room temperature and high temperature mechanical properties of ZA alloys, Neodymium Magnets amend friction and abrasion properties of ZA alloys.In this paper, the development general situation and research status of Zn-Al alloys have been reviewed.
　　The paper has studied the high Al Zn-based alloys reinforced by rare earth oxide, observed and investigated the metallographic microstucture and mechanical properties (include strength, hardness, ductility and tensile strength at high temperature) and friction abrasion properties. The result demonstrate that the high Al Zn-based alloys consisted of http://www.999magnet.com/ aluminium-rich α branch crystal、α and η eutectoid and a few copper-rich ε phase、 eutectic.With the increasing aluminium content of alloys, α phase is increased, but α and η eutectoid is drcreased. After adding rare earth oxide to the high Al Zn-based alloys, their room temperature and high temperature mechanical properties are improved.Neodymium Magnets Compared with the ZA40 composites, its room temperature tensile strength improved 12.4%, hardness improved 24.5%, high temperature tensile strength improved 43% , but its ductility reduced. Compared with the ZA27 and cast plumbum-bronze ZQPbD, its friction and wear properties are increased.The rare earth oxide and strontium salt can refine the basic structure 、 firstborn Si phase and firstborn α branch crystal.The dispered oxide grains as the second phases reinforced the alloys. But as the oxide grains are very small , too much rare earth oxide can be reunited, so result in the decrease of mechanical properties of the composites.

Micro-Nanometer Rare Earth Borate Phosphors by In-situ Sol-gel Construction of Hybrid Precursors

Micro-Nanometer Rare Earth Borate Phosphors by In-situ Sol-gel Construction of Hybrid Precursors
　　In this paper,we firstly put forward a novel optimized synthesis of rare earth silicates luminescence micron-nanometer materials through in-situ sol-gel route:We select rare earth coordination polymers as the precursors of corresponding rare earth rare earth silicates for their infinite chain-like polymeric structure similar to organic polymer template.Organic polymer was used as dispersing medium template and the polybasic hybrid polymeric precursors were assembled with other functional components such as PEG,PVA for the precursor of network.After heat-treatment of the resulting muticomponent hybrid precursors,the rare earth borate phophors were achieved.Most of the the Neodymium Magnets particles exhibit good crystal morphology and the size of the particles is in the range of micrometer or sub-micrometer.
　　The three-dimensional sizes of crystalline grain are rather thick to afford high powder,it needs to refer that the crystalline powder and the micrometer dimension for these powders with high strength would be very useful for the application to obtain high efficient phosphors because these macro crystalline materials can result in the high luminescent intensities http://www.999magnet.com/ which can avoid the traps formation of excess surface area for nanometer phosphors.We have already successfully synthesized three series of luminescence materials:LnBO3:RE,Ln=Y,Gd;RE=Eu3+,Tb3+;Ln3BO6:RE,Ln=La,Y,Gd; RE=Eu3+,Tb3+,Dy3+;LnAl3(BO3)4:RE,Ln=La,Y,Gd;RE=Eu3+,Tb3+.We have firstly achieved novel unexpected morphological structure just like coral in the silicate oxyapatites luminescence nanophosphor.There are also exhibit some novel morphological structures of microrod of LnAl3(BO3)4:RE,Ln=La,Y,Gd;RE =Eu3+,Tb3+,Dy3+with huntite structure.The photoluminescent properties of materials doped with Tb3+has been studied as a function of Th3+doping concentration.Cross-relaxation process between identical Tb3+ions results in the quenching of the 5D3 emission for high concentration sample.Neodymium Magnets The photoluminescent properties of samples doped with Eu3+has been studied as a function of Eu3+doping concentration.Cross-relaxation process between Eu3+ions results in the quenching of the 5D1 emission for high concentration sample.As for the system of LnAl3(BO3)4: Dy3+,Ln=La,Y,Gd,we find that the intensity ratio of yellow-to blue(Y/B)of Dy3+ was significantly influenced by the x value,which is that with the x value increasing, the Y/B intensity ratio increased and then decreased,and through the adjustment on treatment and dopant,white emition could be achieved.

Development of Upconversion Phosphors with Three Primary Colors Based on Rare-Earth Doped Solid Compounds

Development of Upconversion Phosphors with Three Primary Colors Based on Rare-Earth Doped Solid Compounds
　　In this thesis, several kinds of phosphors were synthesized via solid-state reaction method, including rare earth ion Er3+/Yb3+ co-doped sodium yttrium fluoride based green emitting upconversion phosphor, Tm3+/Yb3+ co-doped sodium yttrium fluoride based blue emitting upconversion phosphor, Er3+/Yb3+ co-doped YOCl and YOF based red emitting upconversion phosphor. It was systematically discussed for the effect of rare earth ion concentration, the chemical structure of the host lattices, heating temperature and holding time on the luminescent properties.A kind of upconversion phosphor for 980nm LD exciting in which pure hexagonal NaYF4:Er3+/Yb3+ was obtained strong magnets developed in two stages via solid-state reaction route under reducing atmospheres. With changing Er and Yb concentration, the green emission intensity increases with respect to the red intensity. The properties of two kinds of phosphors were compared with NaF and Na2Sif6 as reagents, respectively. It was found that luminescent properties of the samples prepared with NaF were http://www.chinamagnets.biz/ better. The result showed that heating temperature and holding time have significant influence on the properties of the phosphor, and the best green upconversion samples were obtained with heating temperature at 575℃for 8h. However, as heating temperature increase to 650℃, cubic NaYF4 was observed with diffraction and the green emission intensity were decreased due to the occurrence of the cubic NaYF4.
　　In order to improve the luminescent properties of NaYF4: Er3+/Yb3+ further, the orthogonal design of L9(34) was applied. In the experiments, four factors of the Er3+ concentration, Yb3+ concentration, heating time and holding time were considered, and the result showed that NaYF4 phosphor doped with 1mol%Er3+ and 20mol%Yb3+, and heated at 600℃for 6h, had the optimal green emission.Tm3+/Yb3+ co-doped NaYF4 phosphor with upconversion blue strong magnets emitting was synthesized via the solid-state reaction. With changing Tm and Yb concentration, the blue emission intensity increases with respect to the red intensity. Comparing the upconversion properties between hexagonal NaYbF4:Tm3+ and NaYF4:Tm3+/Yb3+, the optimal doping level was 0.2mol% of Tm3+ doping NaYF4 as well as 0.4mol% of Tm3+ doping NaYbF4; and the blue emission of NaYF4:Tm0.0023+,Yb0.43+ was higher and purer than that of NaYbF4:Tm0.0043+.As the emission of red transition was better in the samples with existence of oxides, YOCl:Yb,Er and YOF:Yb,Er phosphors were studied with the solid-state reaction method. In the YOCl:Yb,Er system, strongest red emission was obtained doped with 2mol% Er3+ and 20mol% Yb3+. Due to unstable upconversion properties of Y0C1 phosphors, Er3+/Yb3+ co-doped YF3-YOF phosphors were chosen. YF3:Yb3+/Er3+ behavied the lowest emission strong magnets intensity and the smallest ratio of red to green intensity. When the content of YOF phase was larger, the red emission intensity increased with respect to the green intensity and, the pure YOF phosphor co-doped with Er3+/Yb3+ showed the highest red emission.

The Influence of Rare-earth Ce on Microstructure and Mechanical Properties of Squeeze Casting ZA27 Alloy

The Influence of Rare-earth Ce on Microstructure and Mechanical Properties of Squeeze Casting ZA27 Alloy
　　The influence of rare-earth Ce on microstructure and mechanical properties of squeeze casting ZA27 alloy was studied in this paper. ZA27 cup-shaped squeeze casting with content of Ce 0%, 0.15%, 0.30%, 0.45% and 0.60% was prepared under the processing parameters of specific pressure 320MPa, mould temperature 180℃～220℃, pouring temperature 650℃, pressure time 30s and pressure holding time 45s.
　　The results show that the mechanical properties of cup-shaped ZA27 casting can be attained as follows: tensile strengthσb≥420MPa, elongationδ5≥5.5%, hardness HB≥124. Rare-earth Ce can significantly improve the combination properties of ZA27 cup-shaped squeeze casting alloy, e.g. tensile strength and hardness are increased apparently.neodymium rare earth magnets Through deterioration, purification and micro alloy function, rare-earth Ce have refined microstructure of squeeze casting ZA27 alloy. The microstructure have been obviously improved when Ce content is 0.15%. Irregular and white compounds have been generated around http://www.chinamagnets.biz/ crystal grain edge and crystal boundary when Ce content is more then 0.30%. The compound contains elements of Zn, Al, Cu, Ce and Mg by using the electron probe,α,βand eutectic phases have been detectde by using line scanning. Few Ce element has been found inside these phases. And main amount of rare earth Ce was found within the compound in the ZA27 alloy.The influence of heat treatment on the neodymium rare earth magnets microstructure and mechanical properties has been researched in this paper. Heat treatment can uniform the structure of bar-shaped ZA27, and thus better combination properties after 320℃×8h water quench+100×6h aging are obtained. 320℃×8h water quench+ 150℃×6h aging may improve the elogation of alloy.

Preparation and Performance of Rare Earth Doped Organic Complexes

Preparation and Performance of Rare Earth Doped Organic Complexes
　　In my paper : (1) with citric acid as the first ligand and 1,10-phenanth--roline as the secondary ligand, ternary rare earth complexes with a series of different ratios of Eu/Y and Tb/Y were synthesized. (2) with benzoic acid as the first ligand and 1,10-phenanthroline as the secondary ligand, rare earth complexes doped Y3+ and Dy3+ were synthesized. (3) with PMBP as the first ligand and aspirin as the secondary ligand, ternary rare earth complexes with a sery of Block Neodymium magnets different ratios of Eu/Tb were synthesized.The composition and structure of the complexes were characterized by IR spectra and elemental analysis. The rare earth ions coordinated with the ligands.The ligand’s absorption resulted in the complexes’ absorption which holded the http://www.999magnet.com/ character of π→π transition. Fluorescent rare earth ions intensity to the doped Y3+ and Europium ions fluorescent intensity to the doped Tb3+ and Dy3+ were obviously increased by fluorescent spectra.

Preparation of Rare-Earth Containing Coagulant and Treatment for the Municipal Wastewater

Preparation of Rare-Earth Containing Coagulant and Treatment for the Municipal Wastewater
　　Two kinds of methods (one is to adjust basicity by adding calcium oxide ,the other is electrolysis)were used to prepare rare-earth containing compound coagulants. These methods for preparing Polymerize Aluminum Chloride (PAC) were reported early ,but to prepare rare-earth containing compound coagulants are not reported,We firstly use these methods to magnet lifter prepare rare-earth containing compound coagulants .
　　Each of them has its advantages and disadvantages, the first one is time-saving, it only needs eight hours(including aging time),but its disadvantage is difficult to prepare higher basicity , concentrating and stable products .Electrolysis method(the second one)can easily get stable and concentrating coagulant ,but its disadvantage is time-consuming.The complex colorimetric magnet lifter method showed aluminum species distribution of the products (RE) prepared by method one is the same as the industrial PAC. Aluminum species distribution of products (PACR)

The Study of Electronic-Magnetic Properties of the Rare-Earth Elements Substituted Hexgonal Ferrites

The Study of Electronic-Magnetic Properties of the Rare-Earth Elements Substituted Hexgonal Ferrites
　　With the rapid development of modern science and technology, electromagnetic radiation on human health and all kinds of electrical and electronic equipment has the increasingly serious harm.Therefore, the development of material with good performance against EMI is of great significance.Co2Z-type hexagonal ferrite materials because of the large anisotropy field,can be used in the GHz.In the international ion substitution, formulation, preparation technology are the main research on the hexagonal ferrite materials.In this paper, I used the replacement of rare earth ions Segment neodymium magnets and doped SiO2 to improve the properties of Co2Z-type hexagonal ferrite material.
　　This paper presents a study of purpose and meaning, and the limitations of currently used spinel ferrite, leds to Z-hexagonal ferrite materials which have enormous potential and displays the main research methods and research results of Co2Z– hexaferrites at home and abroad.Study the basic theory of the hexagonal ferrite and the conditions for the synthesis, structure and electromagnetic properties.First, without doping the polycrystalline Ba3Co2Fe24O41 were prepared http://www.999magnet.com/ by an usual ceramic sintering method.Study the preparation and its electromagnetic characteristics, the sintering temperature was 1200℃.Then with the replacement of REE,R = La, Gd, Ho the Ba3Co2RxFe24-xO41 was prepared, substitution X=0~0.3, and the sintering temperature was1200℃.Found that apart from La replaced, the properties of the samples were a larger improvement than without the replacement rare-earth ions.Particularly when the Gd substitution X=0.1, the samples with the following features :①high permeability;②high attrition;③high natural resonant frequency.To further enhance performance, we can Segment neodymium magnets improve the microstructure of materials to improve the permeability rate.Finally with the Gd replacement, different content of SiO2 were dopped.Sintering temperature was still 1200℃.When the SiO2 content of the doping was 0.2wt%, the real and imaginary parts of the permeability have been improved, the natural resonant frequency shifted to high frequency.Doped SiO2 there is not obvious impact on complex permittivity.

Study on Preparation and Properties of Nano-ZnO and ZnO/RE Particles

Study on Preparation and Properties of Nano-ZnO and ZnO/RE Particles
　　ZnO is one of the most attractive functional semiconductor materials. It has a wide band gap(3.37 eV) and a high exciton binding energy (60 meV) at room temperature. Due to its good optoelectronic properties, it can be widely applied in the fields of room-temperature ultraviolet lasing, sensor and photocatalysis etc. ZnO has many intrinsic point defects such as oxygen vacancy and zinc interstitial atom. Doping to ZnO is one of the methods to improve its performance.La-doped ZnO was synthesized by hydrothermal method. The effect of pH, doping content and reaction time on the size and morphology of the particles was evaluated. The products were characterized by XRD, SEM, EDS and UV-Vis.
　　The results indicated that the growth of ZnO crystals was inhibited during the doping process. The ZnO/La2O3 composite powders with size of 20～40 nm were obtained; As the radius of La3+ is bigger than that of Zn2+, the doping with La into ZnO Special shape NdFeB magnets crystal lattice caused the distortion of lattice and the change of lattice parameters; The photocatalysis properties of ZnO were improved when the doping content was 3%.ZnO composite powers doped with La, Y and Nd were prepared by polymer network method. The influence of doping content and sintering temperature on the particles size and morphology was discussed. The samples were characterized by XRD, SEM, TEM, EDS and FT-IR. The results showed that the http://www.999magnet.com/  doping with La, Y and Nd can suppress the growth of ZnO, the particle size of the composite particles decreased with the increase of doping content, whereas the size increased with the increase of sintering temperature.ZnO nanometer powders were prepared by microwave method and microwave-hydrothermal method, the influence of pH on the size and morphology of the particles prepared by microwave-hydrothermal method and traditional hydrothermal method was studied. The characterization of the products by XRD and SEM showed that the microwave method had the advantage of energy saving and high efficiency during Special shape NdFeB magnets the reaction, and might directly synthesize homogenous morphology nanoparticle with the size of 37.8 nm.conducting composite materials were fabricated by using polyaniline to modify the surface of ZnO, ZnO/La2O3, ZnO/Y2O3 and ZnO/Nd2O3. The samples were characterized by XRD and SEM. The conductivity of ZnO-PANI was measured by four probe electrical conductivity instrument and equal to 2.326 s·m-1, which was one order higher than that of RE-doped ZnO.

经典多金属氧酸盐超分子组装体的水热合成、结构和性质研究

题名:经典多金属氧酸盐超分子组装体的水热合成、结构和性质研究
作者:王丽霞
学位授予单位:东北师范大学
关键词:多金属氧簇;;有机胺配体;;稀土阳离子簇;;超分子组装体
摘要:
 本论文主要以经典的Keggin结构和Wells-Dawson结构多金属氧酸盐簇为基本建筑单元,分别和刚性有机胺配体、柔性有机胺配体以及稀土阳离子簇进行超分子组装,得到了一系列有机-无机超分子化合物,探讨了合成此类多金属氧酸Segment neodymium magnets盐化合物的反应规律,并研究了化合物结构和功能之间的关系。
 利用水热技术,通过调节反应条件和改变反应原料的种类合成了5种新的基于多金属氧酸盐的有机-无机超分子化合物。通过元素分析、IR、单晶X-射线分析对这些晶体的结构进行了表征,并进行了电化学性质的初步研究。
 1.以Keggin型多金属氧http://www.999magnet.com/酸盐作为建筑块,通过引入刚性配体Me_2bpy分子和柔性的bbi有机胺分子,设计、合成并表征了2个超分子化合物: [H_3(Me_2bpy)_4][PW_(12)O_(40)]·3H_2O (1) [H_3(bbi)_(2.5)][PMo_(12)O_(40)]·H_2O (2)
 化合物1和2是在相似的条件下合成的,但是由于选择的有机配体的性质不同而导致其超分子堆积模式的不同。化合物1中的刚性分子能提供丰富的π-π堆积作用,形成了直线形的超分子链。在化合物2中,柔性配体bbi构型多样,能够自由转动和弯曲,且通过π-π堆积作用和氢键作用形成波浪形的链结构,多阴离子则分散在相邻链的Segment neodymium magnets波峰与波谷交界处。
 2.以Wells-Dawson型多金属氧酸盐作为建筑块与双核稀土阳离子簇构筑同构的超分子化合物3-5。[Tb_2(C_6H5NO_2)_4][P_2W_(18)O_(62)]·14H_2O (3) [Sm_2(C_6H5NO_2)_4][P_2W_(18)O_(62)]·15H_2O (4) [Yb_2(C_6H_5NO_2)_4][P_2W_(18)O_(62)]·16H_2O (5)
 在化合物3中,两个Tb原子通过作为双齿配体的三个C_6H_5NO_2分子桥连而形成双核簇[Tb_2(C_6H_5NO_2)_4]~(3+)。从c轴方向看,多阴离子和抗衡阳离子簇形成2D超分子波浪形的层结构。相邻的层之间波峰与波谷相对,这样就形成了1D的椭圆形的孔道结构,并被大量的水分子所占据。
学位年度:2009

钼酸盐红色荧光粉的水热合成及性能研究

题名:钼酸盐红色荧光粉的水热合成及性能研究
作者:张艳
学位授予单位:河北师范大学
关键词:钼酸盐;;Eu~(3+);;发光;;水热合成
摘要:
 近年来,具有无污染,寿命长与发光效率高等优点的白光发光二极管(LED)成为研究的焦点,是具有广泛应用前景的绿色照明光源。荧光体转Alnico magnets换技术是目前获取白光LED的主流方法之一。但目前缺乏在近紫外产生高效红光的优质荧光粉,因此研制高效的白光LED用红色荧光粉是亟待解决的问题。
 本论文采用水热合成法,以钼酸盐作为基质材料激活稀土Eu~(3+),引入含氧酸根离子制备了多种可被近紫外光有效激发的红色荧光粉NaEu(MoO_4)_(2-x)M_y(M=SiO_3~(2-)、PO_4~(3-)、ClO_3~-)和Ca_(0.64)Eu_(0.24)(MoO_4)_(1-x)M_y(M=SiO_3~(2-)、PO_4~(3-)、SO_4~(2-)、ClO_3~-)。通过实验确定了最佳的水热反应条件。在最佳的反应条件下,考虑有效电荷平衡掺入阴离子,掺杂方式为一个SiO_3~(2-)和SO_4~(2-)等价取代一个MoO_4~(2-),由于PO_4~(3-)、ClO_3~-与MoO_4~(2-)的电价不匹http://www.999magnet.com/配,为了保持电荷平衡,所以利用2/3个PO_4~(3-)和2个ClO_3~-取代一个MoO_4~(2-)。
 为了研究不同水热反应时间和不同掺杂阴离子对基质性能的影响,对产物进行了X-射线衍射、扫描电镜、X-射线能谱、激发和发射光谱等表征。测试结果说明所有的样品都具有四方晶系白钨矿结构结构(Scheelite)。含氧酸根阴离子(除SiO_3~(2-)外)掺杂后能够很好的改善样品的结晶效果;并且在近紫外光(395 nm)激发下,所制备样品的红光发射强度都强于商用红粉(Y_2O_2S:Eu),特别是ClO_3~-引入后,Eu~(3+)Alnico magnets的红光发射明显增强,达到商用红粉的7倍以上。
 本论文关于水热合成法制备含氧酸根阴离子掺杂、稀土Eu~(3+)激活的钼酸盐荧光粉的研究,对白光LED用高效红色发光材料的应用研究提供一定的实验依据。
学位年度:2009

过渡金属元素对甲烷催化燃烧性能影响的研究

题名:过渡金属元素对甲烷催化燃烧性能影响的研究
作者:宋辉
学位授予单位:沈阳航空工业学院
关键词:甲烷催化燃烧;;催化剂;;过渡金属元素;;粉煤灰载体;;复合金属氧化物
摘要:
 天然气传统燃烧利用方式不仅造成严重的环境污染,而且能源利用效率低。催化燃烧技术作为一种环境友好且燃烧效率高的能源利用方式越来越受到重视。本文从甲烷燃烧催化剂载体和过渡金属元素Fe、Cu、Ni分别与CeO_2形成的Ce_(1-x)M_xO_y(M=Fe、Cu、Ni)复合氧化物的催化活性两方面详细研究了过渡金属元素对甲烷催化燃烧过程的影响。
 本文采用X射线衍射(XRD)、扫描电Magnetic lifter子显微镜(SEM)和激光粒度分析等多种分析方法对富含Al2O3、SiO2和Fe2O3的粉煤灰的特性进行了详细的分析,包括:粒度分级测试、磁性分析、成分分析、微观形貌分析和晶相结构分析。并考察了粉煤灰对甲烷燃烧的催化作用,研究表明粉煤灰具有孔隙结构且活性高,有一定的催化活性。并进一步以粉煤灰为载体过渡金属氧化物Fe2O3为活性组分制备了负载型催化剂,详细研究了粉煤灰的颗粒粒度、磁性和活性组分负载浓度等因素对甲烷催化燃烧性能的影响。结果表明:具有磁性且粒径小的粉煤灰颗粒负载大浓度的活性组分时对甲烷燃烧具有最佳的催化活性。
 作者采用共沉淀法结合微波干燥技术将过渡http://www.999magnet.com/金属元素Fe、Cu、Ni的氧化物与CeO_2混合,制备了Ce_(1-x)M_xO_y(M=Fe、Cu、Ni)系列复合氧化物,并采用热重和差热分析方法,对所制备的复合氧化物的前驱体进行了详细的分析。通过甲烷燃烧催化活性测试,考察了过渡金属元素取代值x对Ce_(1-x)M_xO_y(M=Fe、Cu、Ni)复合氧化物甲烷催化燃烧活性的影响,结果表明:过渡金属元素Fe和Ni与CeO_2形成的Ce_(1-x)Fe_xO_y和Ce_(1-x)Ni_xO_y复合氧化物的甲烷燃烧催化活性显著提高,取代值x是影响复合氧化物甲烷Magnetic lifter燃烧催化活性的重要因素,对于Ce_(1-x)Fe_xO_y复合氧化物,取代值x为0.3时,即Ce0.7Fe0.3Oy催化活性最好,而在Ce_(1-x)Ni_xO_y复合氧化物中,x为0.5时,即Ce0.5Ni0.5Oy催化活性最好,Cu引入CeO_2晶格形成的Ce1-xCuxOy复合氧化物催化活性并未得到明显改善。同时,在Ce_(1-x)M_xO_y(M=Fe、Cu、Ni)复合氧化物中掺杂稀土元素La,研究了La掺杂对复合氧化物甲烷催化燃烧性能的影响。研究表明:将少量稀土元素La掺杂于Ce_(1-x)M_xO_y(M=Fe、Cu)复合氧化物中,有助于其催化活性的提高,但掺杂过高会使其催化活性下降,在Ce_(1-x)Ni_xO_y复合氧化物中掺杂La催化活性均显著下降。
学位年度:2009

不同形貌的纳米长余辉发光材料的合成与表征

题名:不同形貌的纳米长余辉发光材料的合成与表征
作者:李文宇
学位授予单位:暨南大学
关键词:长余辉发光;;纳米材料;;硫氧化钇
摘要:
 长余辉发光材料也被称作磷光材料,在安全应急、荧光灯、紧急照明系统、阴极射线管等具有潜在的应用价值。近年来一维纳米材料因为其在光学,电子,生化和医疗器械上具有广泛的应用前景引起人们极大的关注。如果将长余辉发光材料纳米化,他们将可能出现一些新的性质。本文侧重于合成具有不同形貌的纳米长余Neodymium Magnets辉发光材料,具体的结论与成果如下:
 (1)采用新型水热.微波法合成了纳米晶长余辉发光材料Y_2O_2S:Eu~(3+),Mg~(2+),Ti~(4+),这是一种低温、简便、环保且不需要研磨的合成方法,纳米晶Y_2O_2S:Eu~(3+),Mg~(2+),Ti~(4+)粒径小,分布均匀,发光性能良好。余辉颜色为红色,具有良好的余辉效果。
 (2)发展了新的水热.高温固相法成功制备了纳米晶Y_2O_2S:Eu~(3+),Mg~(2+),Ti~(4+)长余辉发光材料,并对产物的形成机制进行了探http://www.999magnet.com/讨,此法为制备尺寸均一、分散性好的纳米材料的提供了新的方法。
 (3)首次使用溶剂热合成了纳米棒状Y(OH)_3,在石墨坩埚中,CS_2气氛下煅烧合成了Y_2O_2S:Eu~(3+),Mg~(2+),Ti~(4+)纳米棒。纳米棒粒径大小平均为30-50nm,有较好的稳定性。
 (4)首次使用水热方法合成了直径约60-80nm的Y(OH)_3纳米管,经1100℃在CS_2气氛中煅烧得到Y_2O_2S:Eu~(3+),Mg~(2+),Ti~(4+)纳米管。Y_2O_2S:Eu~(3+),Mg~(2+),Ti~(4+)纳米管保持了前躯体的形貌,为今后进行表面处理和组装及研制高效发光的一维Y_2O_2S:Eu~(3+),Mg~(2+),Ti~(4+)磷光体打下基础。
 (5)首次采用均匀共沉淀法合成单分散前Neodymium Magnets驱体Y(OH)(CO_3):Eu~(3+),粒子形状为球形。经煅烧后获得单分散Y_2O_2S:Eu~(3+),Mg~(2+),Ti~(4+)纳米球,产物分散性好,粒径大小均匀。纳米球表面光滑,没有发生明显的团聚现象,粒径大小为100-150nm,是一种红色发光材料。
学位年度:2009

Synthesis、Characterization and Fluorescence Properties of Rare Earth-Rare Earth

Synthesis、Characterization and Fluorescence Properties of Rare Earth-Rare Earth and Rare Earth-Non-Rare Earth Mental Doped Complexes with Crown Ethers and p-Phthalic Acid
Rare earth elements have practical applications in many fields due to their special electronic, spectroscopic and magnetic properties associated with magnet lifter the unique 4f~n electronic configuration, such as contrast agents for medical resonance imaging (MRI), fluorescent probes for analysis, luminescent stains for protein and amino acids labeling, sensitive homogeneous immunoassays, precursor of semiconductor and catalysts for the selective cleavage of RNA and DNA et al. So the synthesis 、 design and property researching of rare earth materials are of great interest at present.So in magnet lifter  this dissertation, eighteen solid complexes of two series of hetero-nuclear Eu(or Tb)-rare earth perchlorate with crown ethers and

Experimental Research on Rare Earth Ions Complexes Sensitization Effect

Experimental Research on Rare Earth Ions Complexes Sensitization Effect
　　Rare earth complex-doped polymers have promising applications not only in polymer light waveguides and fiber amplifiers, but also in other optics detectors, because of their width absorb section,sharp apex of rare earth ions,high doped concentrations, favorable fluorescence intensity and long fluorescence lifetimes. So, in this paper, fluorescence properties of polymers doped with rare earth ions were investigated in details.Firstly, the development of rare earth Block Neodymium magnets complex-doped polymer amplifiers was given. The merit of rare earth complex-doped polymer amplifiers has been introduced.
　　The mechanism of luminous of rare earth ions and sensitization effect was explained.Secondly, based on the energy level match principle between rare earth ions and ligand and other related regulations, through the comparative analysis of the experimental materials, the experimental materials which were elected. Such as EuCl3 ,SmCl3 ,Tb2O3, TTFA and so on.Finally rare earth ions doped and co-doped polymer were synthesized by useding EuCl3 ,SmCl3 ,Tb2O3, and TTFA. The two kinds of rare-earth ions complexes was prepared. its absorption spectrum and fluorescence spectroscopy was measured and characteristics of sensitization effect among Eu3+,Sm3+,Tb3+and the characteristics of sensitization effect between TTFA and rare-earth ions was analysised.Based on the results of the analysis of the results,it is can be found that in experimental rare-earth ions single-doped complexs Block Neodymium magnets RE-Eu3+,Sm3+,Tb3+ and TTFA and rare-earth ions co-doped complexs Eu:,Sm:(TTFA)3,Tb:,Sm:(TTFA)3,Eu:,Tb:(TTFA)3 both have sensitization effect in particular Eu(TTFA)3, Eu:,Sm:(TTFA)3.So it has good developed prospects in applying to polymer fiber amplifier.

Construction of Luminescent Rare Earth Hybrid Materials and Thin Films by Modifying Functional Molecular Bridge

Construction of Luminescent Rare Earth Hybrid Materials and Thin Films by Modifying Functional Molecular Bridge
　　The main aim of this paper is to develop novel Organic-Inorganic hybrid materials and solid films with improved luminescent properties which can be used as high performed luminescent materials.Based on the coordinating ligands we synthesized coupling monomers with silicate coupling agents and then by sol-gel process and in-situ synthesis method we assemble the Special shape NdFeB magnets  monomer and silicate matrix to hybrid materials.
　　The materials combine the both properties of functional molecular and inorganic matrix. The obtained materials are improved in thermal stabilities, luminescent properties, single-phased. One route here used is modifying aromatic acid including benzoic acid, 2-benzylbenzoic acid, 2-furancarboxylic acid, 2-bromophenylacetic acid, 2-pyrazinecarboxylic acid, Construction of Luminescent Rare Earth Hybrid Materials and Thin Films by Modifying Functional Molecular Bridge phenylmalonic acid and tert-butylbenzoic acid. Deriving from conjugated π bonds these ligands can be good Construction of Luminescent Rare Earth Hybrid Materials and Thin Films by Modifying Functional Molecular Bridge sensitizer to rare earth ions. Firstly aromatic acids are used to react with SOCl2 and then the purified products are used to react with silicate coupling agents such as (3-aminopropyl)triethoxysilane. The got products are used as precursors to co-hydrolysis and co-condensate with crossing agents such as tetraethoxysilane. During the sol-gel process the functional molecular are covalently bonded to Si-O networks. The final materials exhibit excellent luminescent properties and these molecular hybrids form single phase to get good physical properties.In the experiments sol-gel method and in-situ synthesis method are used. Sol-gel technology is the one of the most versatile methods for the preparation of inorganic-organic hybrid materials for its low processing temperature, Special shape NdFeB magnets which allows the incorporation of luminescent species into host matrix through the hydrolysis and polycondensation. And it also can shorten the reaction time. Begun with soluble precursors, the reactants can be mixed in the scale of molecular and the ratio also can be controlled which is very helpful for the formation of materials. Regular structures of these materials lead to good properties of the materials.The other route here we synthesis hybrids is modifying hydroxyl of ligands by 3-(triethoxysilyl)-propyl isocyanate to get coupling monomers. The ligands used are 3, 5-dihydroxybenzoic acid and 8-hydroxylquinoline. After the addition reaction of-OH and -N=C=O, the got monomer can be used as precursors to co-hydrolysis and

Construction of Luminescent Rare Earth Hybrid Materials and Thin Films by Modifying Functional Molecular Bridge

Construction of Luminescent Rare Earth Hybrid Materials and Thin Films by Modifying Functional Molecular Bridge
　　The main aim of this paper is to develop novel Organic-Inorganic hybrid materials and solid films with improved luminescent properties which can be used as high performed luminescent materials.Based on the coordinating ligands we synthesized coupling monomers with silicate coupling agents and then by sol-gel process and in-situ synthesis method we assemble the monomer and silicate matrix to hybrid materials.
　　The materials combine the both properties of functional molecular and inorganic matrix. The obtained materials are improved in thermal stabilities, luminescent properties, single-phased. One route here used is modifying aromatic acid including benzoic acid, 2-benzylbenzoic acid, 2-furancarboxylic acid, 2-bromophenylacetic acid, 2-pyrazinecarboxylic acid, phenylmalonic acid and tert-butylbenzoic acid. Deriving from conjugated π bonds these ligands can be good sensitizer to rare earth ions. Firstly aromatic acids are used to react with SOCl2 and then the purified Alnico magnets products are used to react with silicate coupling agents such as (3-aminopropyl)triethoxysilane. The got products are used as precursors to co-hydrolysis and co-condensate with crossing agents such as tetraethoxysilane. During the sol-gel process the functional molecular are covalently bonded to Si-O networks. The final materials exhibit excellent luminescent properties and these molecular hybrids form single phase to get good physical properties.In the experiments sol-gel method and in-situ synthesis method are used. Sol-gel technology is the one of the most versatile methods for the preparation of inorganic-organic hybrid materials for its low processing temperature, which allows the incorporation of luminescent species into host matrix through the hydrolysis and polycondensation. And it also can shorten the reaction time. Begun with soluble precursors, the reactants can be mixed in the scale of molecular and the ratio also can be controlled which is very helpful for the formation of materials. Regular structures of these Alnico magnets materials lead to good properties of the materials.The other route here we synthesis hybrids is modifying hydroxyl of ligands by 3-(triethoxysilyl)-propyl isocyanate to get coupling monomers. The ligands used are 3, 5-dihydroxybenzoic acid and 8-hydroxylquinoline. After the addition reaction of-OH and -N=C=O, the got monomer can be used as precursors to co-hydrolysis and

基于超磁致伸缩材料的谐波电机研究

题名:基于超磁致伸缩材料的谐波电机研究
作者:高文泉
学位授予单位:大连理工大学
关键词:超磁致伸缩材料;;机电转换性能;;超磁致伸缩驱动器;;谐波电机
摘要:

 稀土超磁致伸缩材料(GMM)是一种新型功能材料,具有磁致伸缩系数大、能量密度高、机电耦合系数大、响应速度快、输出力大等优点,可以实现电、磁能与机械能之间的转换,其机电转换性能非常优异,为此它的开发与应用得到Block neodymium magnet世界各国学者的关注,产量及市场销量增长非常迅速。基于其正磁致伸缩效应制作的超磁致伸缩驱动器(GMA)具有广阔的应用前景,是一类很有潜力的新型微位移驱动器.

 针对传统超磁致伸缩电机由于采用摩擦传动,降低了电机的使用寿命、工作效率以及精度等问题,本文结合谐波齿轮传动的工作原理和超磁致伸缩材料的磁致伸缩性能,设计出了一种新型传动装置一超磁致伸缩谐波电机。其原理就是利用超磁致伸缩驱动器以取代谐波齿轮传动机构中的传统波发生器,并最http://www.chinamagnets.biz/终以谐波齿轮传动的方式输出力与力矩。由于谐波齿轮传动具有高性能、低噪声、大速比及体积小等特点,这种超磁致伸缩谐波电机较传统超磁致伸缩电机的工作性能和可控制性能更加优越。

 本文在以下几个方面开展了研究工作:

 (1)分析谐波齿轮传动的工作原理,较为充分地掌握了超磁致伸缩材料的基本性能。

 (2)研究设计了超磁致伸缩谐波电机的基本结构。本文结合谐波齿轮传动的工作原理和超磁致伸缩材料的性能,设计了超磁致伸缩谐波电机,Block neodymium magnet包括电机工作原理分析、基本结构设计及超磁致伸缩驱动器的设计。

 (3)设计了超磁致伸缩谐波电机控制系统方案。主要包括控制原理分析和控制方案设计,并对超磁致伸缩驱动器的控制策略作了进一步说明。

 (4)对超磁致伸缩驱动器进行了实验研究。包括位移特性实验和输出力测定实验的分析,以验证超磁致伸缩驱动器设计的合理性以及将超磁致伸缩材料应用到谐波齿轮传动上的可行性。
学位年度:2009

新型功能酒石酸基配合物的研究

题名:新型功能酒石酸基配合物的研究
作者:刘文
学位授予单位:宁波大学
关键词:功能配合物;;酒石酸;;晶体结构;;倍频效应;;铁电性质
摘要:

 本论文首先综述了近二十年来迅速发展的基于酒石酸和金属离子的配合物的研究情况。主要涉及酒石酸配位合物的基本类别、结构、合成方法和性质研究。特别是重点介绍了配合物的结构特征和相关特征功能。如介电性质、磁性、铁电效应以及非对称催化等。论文的后续部分报道本实验室是以L-(+)-酒石酸为手性源,主要Block neodymium magnet采用常温溶液法,合成得到5例非中心对称的配位物：[Zn(H2O)(C4H4O6)2/2]·2H2O 1, [Cd2(H2O)(C4H4O6)2]·3H2O 2 [Tb(C4H5O6)(C4H4O6)·3H2O] 3、[Mn(2,2'-bpy)(C4H4O6)]·5H2O 4、(4,4'-Hbpy)(C4H5O6)·H2O5, (C4H4O62-=酒石酸根离子,C4H506=酒石酸氢根离子,2,2'-bpy=2,2'-联吡啶,4,4'-Hbpy=质子化4,4'-联吡啶)。并对其进行了单晶X-射线衍射、粉末X-射线衍射、红外光谱、差热热重分析等基本表征,由于配合物均属于手性空间群,我们还特别对其进行了粉末倍频效应测试和铁电性质研究。

 配合物1结晶于手性空间群C2,Zn2+离子通过酒石酸根的桥联作用形成平行于(001)平面的二维层。性质研究结果表明：配合物1的粉末倍频效应(SHG)为为KDP的0.6倍,脱水产物的倍频效应为KDP的0.4倍；而且具有典型的铁电特征：配合物1的饱和极化强度Ps=0.46μC·cm-2,脱水产物的饱和极化强度Ps=0.43μC·cm-2,均大于典型的铁电晶体罗谢尔盐(NaKC4H4O6·4H2O)的饱和极化强度Ps=0.25μC·cm-2。

 配合物2结晶于手性空间群P21,Cd2+离子通过酒石Block neodymium magnet酸根的桥联作用形成具有{4;8∧2}{4;8∧4;10}拓扑结构三维网络结构。性质研究结果表明：配合物2的粉末倍频效应(SHG)为为KDP的1.1倍,脱水产物的倍频效应为KDP的0.6倍。具有典型的铁电特征：饱和极化强度Ps=0.026μC·cm-2,脱水产物的饱和极化强度Ps=0.0080μC·cm2,均远小于小于罗谢尔盐的Ps值。

 配合物3的空http://www.chinamagnets.biz/间群为P41,酒石酸根桥联稀土Tb3+离子形成平行于(001)平面的二维层状结构。性质研究结果表明：配合物3的并未显示出明显的粉末倍频效应；铁电特征的相关参数也比较小：饱和极化强度Ps=0.065μC·cm-2。配合物3的Ps值小于铁电晶体罗谢尔盐(NaKC4H4O6·4H2O)的饱和极化强度Ps=0.25μC·cm-2.配合物4属于手性空间群P212121,Mn2+离子借助酒石酸根的桥联作用形成无限延伸的一维链状结构。性质研究结果表明：配合物4具有较弱的粉末倍频效应；铁电特征参数饱和极化强度Ps=6.05×10-3μC·cm-2,远小于典型的铁电晶体罗谢尔盐(NaKC4H406·4H20)的饱和极化强度Ps=0.25μC·cm-2,此外还对配合物4的磁化率进行了测试。

 配合物5是由酒石酸与4,4'-联吡啶和水分子形成的三元共晶化合物。空间群为P21。酒石酸氢根、质子化的4,4'-联吡啶和水分子借助Block neodymium magnet氢键作用形成三维超分子。性质研究结果表明：配合物5具有较弱的粉末倍频效应；铁电特征的相关参数也比较小,饱和极化强度Ps=6.06×10-3μC·cm-2,远小于小于罗谢尔盐的Ps值。
学位年度:2009

新疆喀拉通克铜镍矿床矿石矿物微区分析

题名:新疆喀拉通克铜镍矿床矿石矿物微区分析
作者:赵玉梅
学位授予单位:长安大学
关键词:喀拉通克;;铜镍矿;;矿石矿物;;微区分析;;矿石成因
摘要:

 喀拉通克铜镍矿床位于阿尔泰加里东褶皱系和准噶尔海西褶皱系结合部位的准噶尔褶皱系一侧,属萨尔布拉克-萨色克巴斯陶复向斜东部,区内发育一系列次级褶皱和断裂,由11个岩体(Y1-Y9,Y10、Y11)及矿区外围的G21、G22重力异常区和AM16航磁异常区组成,矿体主要赋存于Y1-Y3号岩体中。已探明Y1岩体为大型铜Ball Neodymium Magnets镍矿床,Y2-Y3为中型矿床,其余为4个小型矿床。在整个新疆地区,喀拉通克铜镍矿床是规模大而品位富的代表性岩浆硫化物矿床。

 本文着重从矿石矿物研究着手,通过矿物的显微结构、微区形貌与结构关系等研究,并结合电子探针成分的实际分析和其它http://www.chinamagnets.biz/测试研究成果,对该矿床进行研究,重点探讨了主要矿石矿物的微区成分特征、PGE赋存状态和矿石成因,取得了如下进展：

 (1)通过本文研究,丰富了喀拉通克铜镍矿床矿石矿物的研究资料。

 (2)矿石矿物微区成分分析表明喀拉通克铜镍矿床为岩浆熔离硫化物矿床,后期局部存在热液作用,矿床以富铜为特征。

 (3)各类浸染状矿石应形成于相同或相近物理化学条件下,致密块状矿石具有更复杂的形成过程,但二者均经历了少量硫化物深部熔离的早期过程,从而导致矿床亏损PGE。在致密块状矿石中,致密块状特富铜镍矿石与致密块状高铜富镍矿石同属矿浆贯入的产物,但后者是矿浆结晶演化局部热液性质更为明显的成矿溶液结晶形Ball Neodymium Magnets成的,表现出相容的稀土元素含量较高。

 (4)质量平衡计算显示喀拉通克矿床Pt、Pd在贱金属硫化物的质量分数比例均很低,且黄铜矿几乎不含Pt和Pd,Fe与Pt、Pd的相关系数分别为R2=-0.24和R2=0.45,显示了Fe与Pt、Pd十分微弱的相关性,说明硫化物可能不是Pt和Pd的主要载体矿物,Pt和Pd主要赋存在铂族元素矿物中。
学位年度:2009

安徽月山地区龙门山铜多金属矿床地质地球化学特征及成因分析

题名:安徽月山地区龙门山铜多金属矿床地质地球化学特征及成因分析
作者:刘忠法
学位授予单位:中南大学
关键词:矿床地球化学;;成矿地质条件;;成岩机制;;矿床成因;;安徽龙门山铜多金属矿床
摘要:

 龙门山铜多金属矿床位于扬子地块北缘下扬子台坳沿江断褶带中段的月山岩体内以及岩体与围岩的接触带中,是长江中下游铜铁成矿带neodymium magnets重要矿床之一。在对区域地质背景、矿床地质特征、矿床地球化学特征、成矿地质条件分析的基础上,开展了月山地区控矿因素、成岩机制、矿床成因、成矿模式等方面的研究。论文的研究成果与创新主要有以下几点：

 l、通过对区域地质背景的分析,研究了矿床地质特征、矿体特征、矿石特征,在此基础上,根据矿物共生组合关系,将龙门山铜多金属矿床的成矿作用分为两期六阶段,即：矽卡岩期：早期矽卡岩阶段(透辉石矽卡岩等)、晚期矽卡岩阶段(石榴子石矽卡岩、磁铁矿)、氧化物阶段(钾长石、角闪石、黑云母等)；硫化物期：石英阶段、硫化物阶段(黄铜矿、黄铁矿及少量的斑铜矿)和碳酸盐阶段(碳酸盐矿物及少量的镜http://www.chinamagnets.biz/铁矿)。

 2、根据矿区岩浆岩岩石化学特征、稀土元素和微量元素地球化学特征,得出本区闪长岩类造岩元素K2O/(K2O+Na2O)和Al2O3/(CaO+Na2O+K2O)的指标值分别为0.39～0.41和1.30～1.37,LREE/HREE为8.37～12.84,Sr的丰度较高,平均为881.31×10-6,最高达4840×10-6,远高于上地壳值350×10-6和下地壳值230×10一,显示本区形成月山岩体的原始岩浆来源于上地幔,岩体具富钠、钾的特征,同时富钙的特征也比较明显,其原因可能是岩浆上升时遭受了地壳钙质混染,即地壳的同化混染作用。

 3、探讨了地层、构造、岩浆岩以及围岩与成矿的关系,认为地层提供了部分成矿物质；构造是本区成矿的必要因素,控制了岩浆的侵位及其成矿岩体和矿体的形成和就位；燕山期岩浆岩是有利的成矿母岩,是本区成矿物质的主要提供者；neodymium magnets围岩及围岩裂隙是本区成矿的重要条件,控制脉状矿体的产状与规模。

 4、通过对矿床地质特征、地球化学特征、控矿因素以及成岩机制的分析,认为龙门山铜多金属矿床的形成与燕山期中酸性岩浆侵入活动有密切的关系；在综合研究本区成矿环境、岩浆来源、岩浆演化机制的基础上,建立了同源多期多位一体的成岩、成矿模式,认为龙门山铜多金属矿床是以中酸性岩浆热液交代为主的脉状矽卡岩型铜多金属矿床。
学位年度:2009

Ynthesis and Catalytic Performance of a Serious of Novel Perovskite-Type Catalysts

Ynthesis and Catalytic Performance of a Serious of Novel Perovskite-Type Catalysts
　　A series of perovskite-type composite oxides Ba-Zr-O,La-Ce-O, Sr-Ce-O, Mg-Ce-O,Ba-Ce-O,La-Zr-O,La-Co-O and Ba-Co-O have been prepared by improvement sol-gel method .and composite oxides Ba-Zr-O,Ba-Ce-O, La-Co-O were also prepared by Coprecipitation and Microemulsion method respevtively.and it was studied that the physical and chemical performance and catalytic performance.Then the catalyst BaZrO3 http://www.chinamagnets.biz/ which have higher catalytic activity rare earth magnets of methane combustion were substitude by La to study the effects of doping La on performance of methane catalytic combustion over BaZrO3 catalyst . The catalysts were characterized by XRD、 BET、 FT-IR、 H2-TPR、 TEM、 Electrical Conductivity、 TestMagnetism Test and tested methane combustion activity .The results showed that the single phase perovskite BaCeO3、 BaZrO3、 BaCoO2.70、 SrCeO3 and LaCoO3 were obtained for catalysts Ba-Ce-O、 Ba-Zr-O、 rare earth magnets Ba-Co-O、 Sr-Ce-O and La-Co-O system respectively after calcined at 1200℃ for 3 hours using improvement in sol-gel method.The BaZrO3 catalyst showed higher 更多还原