锗酸盐玻璃的稀土增强机理及其强场辅助纳米微晶化调控

项目名称： 锗酸盐玻璃的稀土增强机理及其强场辅助纳米微晶化调控

项目编号： No.51202098

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 无机非金属材料学科

项目作者： 肖卓豪

作者单位： 景德镇陶瓷学院

项目金额： 25万元

中文摘要： 锗酸盐玻璃由于在0.3-5.0um 波段具有高的光学透过率而在红外光学领域具有非常广阔的应用前景，然而低的机械强度是限制其工程化的瓶颈。本项目针对前期研究过程中发现的稀土氧化钇显著提高锗酸盐玻璃抗弯强度的现象进行基础理论研究，从玻璃的近程结构与中程结构入手、利用NMR、EXAFS、XPS等解析稀土掺杂锗酸盐玻璃的局域结构，探讨稀土离子显著增强锗酸盐玻璃的机理；并从析晶动力学角度出发，开展锗酸盐玻璃在交变强场辅助热处理条件下的受控晶化行为和析晶机理研究，探讨锗酸盐微晶玻璃显微结构对抗弯强度与光学透过率的影响，以期获得微晶尺寸为纳米级的高析晶度的透明高强度稀土掺杂锗酸盐微晶玻璃。本项目可解决高强度、高光学透过率锗酸盐微晶玻璃制备过程中的关键技术问题，不仅为开发新型高强度玻璃材料在组成设计和微晶化工艺研究上提供关键参数，也为发展新型红外光学窗口材料提供一定技术储备。

中文关键词： 锗酸盐玻璃；微晶玻璃；抗弯强度；电场辅助；氧化钇

英文摘要： Germanate glass has a very good prospect in the application field of infrared optical for its high transmittance in the 0.3-5.0um band. However, this engineering application is limited by the low mechanical strength of germanate glass. The results in our preliminary study shows that the bend strength of germanate glass strengthened significantly by doping of Y2O3. The present work researches this phenomenon theoretically. To obtain the strengthen mechanism of rare earth oxides on germanate glass, the local structure including the short-range and the medium-range structure of Y2O3 doped germanate glass will be investigated by means of NMR、EXAFS and XPS. In addition, the behavior and the mechanism of crystallization under the alternating strong field auxiliary heat treatment conditions will be researched according to the crystallization kinetics. The influences of the microstructure on the bending strength and the optical transmittance will be investigated in order to prepare the highly crystallized transparent germanate glass-ceramics with improved mechanical properties. The aim of the project is to solve the key technical problems in the preparation of the transparent strengthened glass-ceramics, which is to provide not only the key parameters for the development of new high-strength glass material in the compos

英文关键词： Gernamate glass；glass-ceramic；Bend-strength；Field-assisted heat treatment；Y2O3