晶态稀土氧化物发光陶瓷材料的超高压高温合成及其性能研究

项目名称： 晶态稀土氧化物发光陶瓷材料的超高压高温合成及其性能研究

项目编号： No.91622105

项目类型： 重大研究计划

立项/批准年度： 2017

项目学科： 数理科学和化学

项目作者： 钟声亮

作者单位： 江西师范大学

项目金额： 80万元

中文摘要： 稀土陶瓷由于其独特的性能备受关注。高压能够有效地改变物质的原子、分子间距及其集成方式，从而获得许多新现象、新规律、新物质、新性能和新材料。陶瓷的性能与制备所用的前驱体以及制备条件密切相关。以配位聚合物为前驱体制备的材料住往表现出许多优异的特性，未见以配位聚合物或以经煅烧配位聚合物所得氧化物为前驱体制备陶瓷材料的研究。在成功制备系列稀土配位聚合物材料的基础上，本研究拟设计具有不同结构基元组成的稀土配位聚合物为前驱体，采用不同路线在超高压高温条件下制备晶态Y2O3:Eu3+、(Y1-xGdx)2O3:Eu3+等发光陶瓷材料。详细考察配位聚合物前驱体的基元结构、压力、温度及压力和温度的升降模式等对其聚集方式、晶体结构及其光学性能的影响。测试材料的发光性能，运用复杂晶体介电理论进行计算，获得材料性能可控的规律。为功能导向陶瓷的制备提供理论依据和方法路线，同时也为其它材料的设计与制备提供指导。

中文关键词： 稀土；陶瓷；配位聚合物；超高压；发光材料

英文摘要： Owing to their novel properties, rare earth ceramics are intensively studied. Under high pressure, the distance and allign mode of atom and molecule can be effectively changed. Many new phenomena, new laws, new substances, new properties and new materials have been acheived under high pressure. The properties of ceramics are closely related to the precursors employed and preparation conditions. Materials derived from coordination polymers always demonstrate excellent properties such as high reactivity and catalytic ability. No reports have appeared on the preparation of ceramics with coordination polymers or derived oxides obtained after calcinations as the precursors. Based on the successful preparation of a series of rare earth coordination polymers, in this study, rare earth coordination polymers built from different units were designed selected as the precursor and their corresponding luminescent ceramics such as crystalline Y2O3:Eu3+ and (Y1-xGdx)2O3:Eu3+ were prepared by different way under ultrahigh pressure and temperature. The effect of the unit of coordination polymers, pressure and temperature, also the increase and decrease mode on their assembly, crystal structure and luminescent properties will be investigated. The luminescent properties will be measured and calculated by the dielectric theory of complex crystals. The property-controllable law wil be obtained. It may provide therorctical principle and prepartion method for the preparation of function-directed ceramics and also give guideline for the design and preparation of other materials.

英文关键词： rare earth ;ceramics;coordination polymer;ultrahigh pressure;luminescent materials