稀土掺杂铁电陶瓷的发光温度特性研究

Based on our previous research work on luminescent rare earth doped ferroelectric materials, we take bismuth layer-structured ferroelectric ceramics with high Curie point as major research objects, and study the ceramic preparation, defect formation and control, and new structural solid-solution design and fabrication with high content doping rare earths. The compositions and microstructure, rare earth and other ions co-doping effects on luminescence properties will be investigated. Based on the FIR technique, the luminescence properties varying with temperature will also be investigated. High-performance rare earth doped luminescence ferroelectric ceramics will be developed. By this project, a ceramic material with high Curie point higher than 600C and excellent photoluminescence or upconversion luminescence properties sensitive to temperature with a sensitivity higher than 0.006 /K in a range of -100C-300C will be obtained. This project will provide a good basis for further luminescence-based temperature sensor applications.

本项目以申请者近年来在稀土发光铁电材料的前期工作为基础，以高居里点铋层状结构铁电陶瓷材料为研究对象，研究稀土Eu、Pr、Sm、Er、Ho、Yb等离子掺杂、替代铁电陶瓷的制备工艺技术、缺陷和发光中心的形成与控制、高浓度稀土离子掺杂、替代情况下陶瓷的结构设计和新型固溶体构筑；研究材料的组成、微观结构、稀土离子掺杂或稀土离子与其它离子共掺对材料光致发光和上转换发光性能的调控，以荧光强度比技术研究发光性能随温度的变化规律和机理；开发出具有自主知识产权的高性能稀土发光铁电陶瓷材料，使其居里点高于600C，同时具有优良的光致发光或上转换发光特性，在-100C-300C温度范围，材料的发光特性随温度变化敏感，灵敏度高于0.006 /K。本研究为基于光致发光或上转换发光的温度传感器和系统奠定良好的材料基础。

制备了稀土掺杂钛酸盐基、铋层状基、铌酸盐基系列铁电发光陶瓷以及钨酸盐基发光陶瓷，研究了稀土Er、Ho、Yb、Tb、Tm等离子掺杂、替代对发光材料的缺陷调控和上转换发光性能的调控。以荧光强度比技术研究发光性能随温度的变化规律和机理，研制出高性能钨酸盐基上转换发光温度敏感材料，在-100C-300C温度范围，测温灵敏度高于0.011K-1。本研究在生物医学、深海等低温区精确测温有应用前景。还研制出镨掺杂钽酸锂基应力发光新材料，具有优良的应力发光性能，对铁电发光材料的多功能应用有科学意义。申请发明专利6项；发表SCI源刊论文18篇，其中2篇ESI高被引。培养博士研究生4人、硕士研究生7人。