稀土高分子发光材料的研究进展

稀土高分子材料是通过稀土金属与高分子的复合而制备的一类兼具稀土光、电、磁等特性和高分子质轻、抗冲击和易加工等优良综合性能的功能材料.通过配位或聚合的方法将稀土离子键合到高分子链上而获得高分子稀土金属配合物是20世纪80年代才出现的一类稀土有机材料,这类兼有稀土离子的光、电、磁特性和有机高分子优良的材料性能的功能材料,因...     

稀土高分子聚合物及其应用

稀土高分子是一类具有许多优异性质和很大应用价值的功能材料，其开发和应用前景十分迷人。本文就掺杂型和键合型稀土高分子的国内外研究概况以及它们在光、电、磁、催化、分析等领域的应用做详细的论述。     

稀土冶炼新工艺、新技术简介

随着稀土应用的日益扩大,稀土的需求量不断增长。特别是高技术的发展,对稀土材料的要求越来越高。同时为了开发稀土金属及其化合物的新特性,特别是光、电、磁性能,也要求制备更高纯度的材料。近年来,许多国     

稀土金属的高纯化技术

稀土元素具有一系列特殊性能,随着高技术的发展,稀土在电子、光电子、新型陶瓷等方面的应用越来越广。对高纯稀土金属材料的需求量也日益增加。同时为了开发稀土金属及其化合物新的特性,特别是光、电、磁性能,也要求制备更高纯度的材料。1987年日本科学技术厅开始实施“关于通过稀有金属高纯化开发新功能的基础技术研究”计划,     

关于我国稀土应用、出口等问题的看法与建议

稀土产品由于其优异的物理化学性质被广泛应用于国民生产与生活领域。稀土元素特有的4f电子结构赋予其优良的光、电、磁性质，成为光、电、磁等新型功能材料的核心。基于此特点，稀土也被称为高新技术产业发展的重要战略材料。     

稀土磁性功能薄膜材料的研究现状

稀土磁性功能薄膜材料由于具有优异的性能和巨大的需求潜力,将在很多领域中发挥重要的作用。本文对各种稀土磁性功能薄膜材料进行了较为系统的综述,重点评述了稀土永磁薄膜、稀土磁光薄膜、稀土磁泡薄膜和稀土磁致伸缩薄膜等稀土磁性功能薄膜材料的研究状况和最新进展。最后指出了稀土磁性功能薄膜材料存在的问题,并展望了它的应用前景。     

稀土发光材料2006-2010年发展规划

我国稀土资源占世界稀土资源的80％，开展稀土精细加工和稀土功能材料的研究和应用，在我国具有独特的意义。发光是稀土化合物光、电、磁三大功能中最突出的功能，受到人们的极大关注，在稀土应用研究中，稀土发光材料占主要地位。稀土离子丰富的能级和4f电子的跃迁特性，使稀土成为巨大的发光宝库，从中可发掘出更多新型的发光材料。我公司多年来一直致力于稀土发光材料的研究、     

稀土多酸膜的组装及其发光性质

多酸是一类具有拓扑结构的金属氧簇合物,在催化领域、生物学、电极、药物以及材料科学均有潜在应用,被称为无机高分子。多酸可以在某一格位接受电子,利用这一特性可以组装具有特定的光、电、磁学特性的膜材料;而稀土元素特殊的电子层结构,具有非常好的发光性能,LB膜可以在分子水平上控制膜的结构和膜厚度,因此研究稀土发光材料组装的LB膜对发光材料的理论研究和应用都具有非常重要的意义。本文总结了国内外近年来的研究结果。     

稀土功能材料综述

稀土元素被誉为二十一世纪新材料的宝库,因其在电、光、磁等方面具有独特性质,故在功能材料领域获得了广泛的应用.文章介绍了稀土磁性材料、稀土发光材料、稀土催化材料、稀土贮氢材料、稀土超导材料的研究及其应用进展.     

稀土MOF发光调色板和高等级防伪条形码材料

<正>MOF(metal-organic framework,金属-有机骨架)是由金属和有机配体组成的骨架材料,是一类新型的多孔材料。简单的来说MOF就是由金属离子或金属和氧原子、羟基、羧酸等组成的团簇与有机配体结合而成的框架材料。而稀土MOF兼具了有机配体与稀土离子的发光特性,增加了发光形式的多样性和可调性,在OLED(Organic Light-Emitting Diode,有机发光半导体)发光材料与器件、化学传感器、生物功能材料、防伪与显示材料等诸多方面有着广     

Review on Rare Earth／Polymer Composite

The epecial properties of rare earth/polymer composite were described.More emphasis was put on the radiation shielding and magnetic properties,In the application to X-ray shielding,rare earth/polymer composite can make up the feeble absorbing area.If the rare earth content is high enough,it can demonstrate strong ability for thermal neutron absorption,The composite has strong paramagnetism.The feasibility of preparing magnetic rare earth/polymer compostite was discussed,In addition,three preparation methods were introducde:simlle polymerization,mixing and reaction processing,The effect of the rare earth/polymer composties pre-sturcture and the coordinate number of rare eatrh ions on the light property was analyzed,Rare earth/polmer compostie may have the structure and property simlar to those of the ionomer,The feasibility of the in-situ preparation of the rare earth/polymer nano structure is indicated ,Besides,the relationship between struchture and properties of the rare earth/polymer composite was discussed,The problems associated with such composite materials were also presented.     

黑色风化物的物理化学性质及稀土配分研究

某稀土矿产生的黑色风化物，是一种稀土以胶态相赋存的新稀土资源。黑色风化物主要由锰、铁，稀土和铅组成，形成锰铁氧化物非晶质的高聚合度无机高分子。黑色风化物强烈地选择铈族轻稀土，与矿区产的矿石和氟碳铈矿稀土配分相近，但黑色风化物含中重稀土最高，矿石次之，氟碳铈矿最低。     

稀土发光性能研究及其应用

对稀土的发光类型进行了简要阐述,对不同发光类型的发光原理进行了论述,并介绍了稀土发光材料在照明显示、无机离子和生命分析检测及矿物分析等领域中的应用,最后对我国稀土材料研究的未来发展提出总结与展望.     

Application of Rare Earth in Steel in China

Application of rare earth in steels has gone through three stages in China.The investigation of rare earthadding method begun at the late 1970's has solved the technical problems caused by rare earth addition.Controlling sulphide morphology,several rare earth treated steel grades with improved properties have been developedand put into production.Rare earth exerts remarkable effect on the performance of low sulphur steel and on thehydrogen behavior in steel.Rare earth used for surface treatment of iron and steel materials expands rare earthutilization.     

Research on Rare Earth Encapsulated Luminescent Material

A new method of preparation of irradiative material by using rare earth as luminophor and inorganic powder as base nucleus was presented.Rare earth was used to make colloid, which was mixed with base nucleus solution,where deposition/attachment reaction took place and rare earth was adhered onto the surface of base nucleus, hence yielding a new rare earth encapsulated irradiative material.Fluorescent spectrum analysis shows that this material possesses two emission peaks, one within 400 ～ 500 nm and the other within 580 ～ 700 nm, reflecting the luminous characteristics of original rare earth material.     

窄谱带稀土配合物发光材料及电致发光器件

具有窄带发射的稀土配合物发光材料 ,因其具有高荧光量子效率 ,高色纯度等特点 ,被用于制备有机电致发光器件。本文对稀土配合物的发光原理、电致发光的研究现状、存在问题及应用前景作了概述。     

Far Infrared Radiation Property of Rare Earth Mineral Composite Materials

Rare earth mineral composite materials were prepared using rare earths and natural far-infrared mineral materials. The influences of rare earth additive content and heat treatment temperature on the far infrared radiance were studied. The results show that the far infrared radiance of rare earth mineral composite materials is 0.93 when the rare earth additive content is 6% and heat treatment temperature is 750 ℃.     

Composition, Processing Technology and Property of Ceramic Die Materials Containing Rare Earth Additives

Development and application of new ceramic die materials is one of the important topics in the field of die research. The composition, processing technology, mechanical property and engineering performance of the ceramic materials such as cermet, ZTA, TZP, TZP/Al2O3, TZP/TiC/Al2O3, PSZ and Sialon, etc., with rare earth yttrium, lanthanum and cerium, and so on working as additives, were investigated and analyzed in the present study. Problems existed in the research and application of rare earth ceramic die materials were discussed. Rare earth additives can effectively improve the mechanical property and engineering performance of ceramic die materials. Thus, it will have further perspectives of wider application. More attention should be paid in the future to the toughening and strengthening of the ceramic die materials, the adding forms and kinds of rare earth elements and acting mechanisms of rare earth additives in ceramic die materials.     

Effects of Rare Earths on Properties and Microstructure of Automotive Friction Materials

Rare earth compounds as modifiers used widely in modern friction materials can enhance the interracial binding of constituents of materials and improve the comprehensive properties of materials evidently. However, there are still few reports on application of rare earth in automotive friction materials. In order to study the effect mechanism of rare earths in friction materials, a rare earth compound was selected as additive and the effects of materials doped with or without rare earth on friction and wear properties of materials were studied. The microstructure and worn surface morphology were observed by scanning electron microscopy and the macro performance was discussed. Worn surface element constitution of materials was analyzed by energy dispersive spectroscopy. Effect mechanism of rare earths on friction and wear behaviors of friction materials were discussed. The results show that doping rare earths in friction materials can stabilize friction Coefficient, lower the wear rate of materials and increase the impact strength of materials. The flexibility and fracture resistance of materials is greatly improved. Worn surface of materials doped with rare earth is compact and the surface adhesion is greatly enhanced.