高晶相体积比Gd基氟化物闪烁微晶玻璃的设计、可控制备与性能研究

本项目属于发光学与材料学的交叉领域。闪烁微晶玻璃具备晶体和玻璃两者的优点，是一种极具吸引力的材料，开发Gd基氟化物闪烁微晶玻璃具有重要意义。基于课题组在发光玻璃、微晶玻璃的设计开发、发光机理分析等方面扎实的研究基础，本项目提出将Ce3+,Tb3+掺杂Gd基微晶玻璃为研究对象，以开发新型高效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。. 通过Gd基氟化物晶相的选取、玻璃组分选择与结构设计、分子动力学模拟玻璃分相与晶化行为，利用析晶工艺，制备高透高晶相体积比Gd基氟化物微晶玻璃。重点研究高晶相体积比微晶玻璃的析晶动力学过程，研究掺杂离子的发光动力学过程和机理，构建玻璃组分-显微结构-光学性能-闪烁性能之间的关联。系统研究提升闪烁微晶玻璃光产额的关键技术和科学方法，以期获得高透高晶相体积比高光产额的Gd基氟化物闪烁微晶玻璃。为闪烁微晶玻璃的开发与应用提供理论和技术支持。

This project relates to interdisciplinary field of luminescence science and materials science. Glass ceramics scintillator has the advantages of both crystal and glass, and is one type of attractive materials. Therefore it is very important and interesting to develop Gd-based fluoride glass ceramics scintillator. This project takes Ce3+, Tb3+ doped Gd-based fluoride glass ceramics scintillator as the research subject, aims to develop new efficient glass ceramics applied in scintillator and to explain the fundamental questions involved. The design and elaboration of Gd-based fluoride glass ceramics with high transparence and high crystal phase volume ratio will be systematically investigated based on the selection of Gd-based fluoride crystalline phase, composition selection and structure design of precursor glass, the simulation of phase separation and crystallization behavior of glass by molecular dynamics method, and crystallization technique. . The research emphases of the project include: (1) to investigate the crystallization kinetics of high crystal phase volume ratio glass ceramics; (2) to investigate the luminescence dynamics process and mechanism; (3) to establish the relationship between glass composition, microstructure, optical/luminescent properties and scintillation properties.. Besides, our group had abundant experiences on the design and elaboration of luminescent glass and glass ceramics and the investigation of their luminescent properties and mechanisms. We have the relevant experimental apparatus to investigate the structural and luminescent properties. So we can fulfill this project undoubtedly and successfully. Our investigation will explore the critical techniques and scientific methods for the development of Gd-based fluoride glass ceramics scintillator with high transparence, high crystal phase volume ratio and high light yield. This project will provide theoretical and technical support for the development and application of glass ceramics scintillator.