镥基微晶玻璃的设计、荧光性能与闪烁体性能研究

本项目属于发光学与材料学的交叉领域。由于透明微晶玻璃的优势和镥基材料在闪烁体方面的重要应用，开发Lu基微晶玻璃闪烁体具有非常重要的意义。 基于课题组在微晶玻璃、发光玻璃等的制备、性能、发光机理方面扎实的研究基础与完备的实验条件，我们拟以稀土离子掺杂的纳米BaLuF5、LuF3微晶玻璃为研究对象，以开发新型高效的微晶玻璃闪烁体为研究目标，以解决其中涉及的基础问题为研究内容。 主要从实验的角度、通过制备工艺和组分优化、结合析晶动力学和稀土光谱理论，系统开展Lu基微晶玻璃的制备、结构、荧光和闪烁体性能的研究。重点研究稀土离子在微晶玻璃中的发光动力学过程和机理：分析稀土离子的分布与格位；确定离子间能量传递的物理机制；研究闪烁体性能与组分、工艺的关系；分析微晶玻璃的性能与晶体、透明陶瓷的异同。探索高质量Lu基微晶玻璃设计和制备中的关键技术和科学方法。为闪烁微晶玻璃的应用提供理论指导和技术支持。

This project relates to interdisciplinary field of luminescence science and materials science. Due to the excellent characters of transparent glass ceramics and the significant application of Lu-based materials in scintillator, it is very important and interesting to develop Lu-based glass ceramics scintillator. This project takes glass ceramics containing rare earth (RE) ions doped BaLuF5 or LuF3 nanocrystals as the research project, aims to develop new efficient glass ceramics scintillator and to explain the fundamental questions involved. We will investigate their elaboration, structural and luminescent properties based on experimental studies, elaboration technique, composition optimization, and combined with crystallization dynamics and RE spectrum theory. The research emphases of the project including: (1) to investigate the luminescent dynamics and mechanisms of RE ions in glass ceramics; (2) to analyze the distribution and coordination sites of RE ions in nano-sized crystals; (3) to study the energy transfer mechanisms between RE ions; (4) to reveal the intrinsic relation between scintillescent properties and components, micro-structure of glass ceramics; (5) to compare the luminescent properties of glasses ceramics with that of single crystals and transparent ceramics; (6) to explore the critical techniques and scientific methods for the elaboration of high quality Lu-based glass ceramics. Besides, our group had abundant experiences on the preparation, investigation of luminescent properties and mechanisms in the field of glass ceramics and luminescent glasses. And we have relevant experimental apparatus to investigate the structural and luminescent properties of glass ceramics. We can fulfill this project undoubtedly and successfully. Our investigation will make some contributions to the development of glass ceramics scintillator, and will enrich the knowledge of RE ions doped nano-sized Lu-based glass ceramics and expand their application fields.