硅酸铋闪烁晶体及其掺杂改性  

Development of Bismuth Silicate Scintillation Crystals and Doping Effects

作　　者：徐家跃 冯海威 潘芸芳 张彦 范世 

机构地区：[1]上海应用技术大学材料科学与工程学院,晶体生长研究所,上海201418

出　　处：《硅酸盐学报》2017年第12期1748-1757,共10页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金(51342007,51572175);“973”前期专项(2011CB612310)资助

摘　　要：硅酸铋(Bi_4Si_3O_(12),BSO)晶体是一种具有闪铋矿结构的氧化物闪烁材料,其衰减时间快于锗酸铋(BGO)晶体,光输出高于钨酸铅(PWO)晶体,被认为是双读出量能器最佳的候选材料之一。综述了硅酸铋晶体在相关系、晶体生长、闪烁性能、掺杂改性等方面的研究进展,比较了不同生长方法的优缺点,总结了稀土掺杂对硅酸铋晶体性能以及结晶习性的影响。研究发现:少量Dy^(3+)掺杂能显著提高硅酸铋晶体的光输出,其发光机理可能与Dy3+的占位有关,高浓度掺杂因为引入竞争性的发光中心而导致光输出下降。此外,掺杂硅酸铋晶体在荧光发光和激光等领域有潜在应用。Bismuth silicate（i.e., Bi4Si3O（12）, BSO） single crystal is an excellent oxide scintillation material with the eulytite structure. It shows a decay time（100 ns） faster than that of BGO crystal and its light yield is greater than that of PWO crystal, thus it is regarded as one of the promising candidates for dual readout calorimeters. This review represented recent development of the phase diagram, growth, scintillation properties and doping effects of BSO crystal. The advantages and disadvantages of different growth techniques were discussed. The influence of dopant on the scintillation properties and crystallization behavior was summarized. The improvement of scintillation properties by doping Dy^3＋ ions is attributed to the compensation of Bi^（3＋） vacancy by a small amount of Dy^3＋ ions. In addition, Re-doped BSO crystals show some potential applications as phosphors and laser materials.

关 键 词：硅酸铋晶体 坩埚下降法 闪烁发光 掺杂 析晶行为 

分 类 号：O482[理学—固体物理]