摘要
稀土正硼酸盐（REBO3）晶体是一类潜在的紫外发光和非线性光学应用方面的材料,其中方解石结构的LuBO3：Ce3＋晶体的光输出可达到26000 Ph·Mev^-1,几乎是BGO（Bi4Ge3O12）的3倍,是PbWO4的135倍,并且该晶体表现出显著的闪烁特性和物力稳定性,例如快的衰减时间（-33 ns）及不易潮解等;但是由于方解石结构相、球霰石结构相以及高温球霰石结构相间存在相变反应,使得大尺寸的纯LuBO3单晶难于生长。因此,在晶体的生长过程中迫切需要明确各结构间的相互关系,并且为了进一步优化和拓展其应用空间,还需要深入了解其组成-结构-性能的相互关系。主要对各种稀土正硼酸盐的晶体结构和结构间的转变进行了总结与分析。
Rare-earth orthoborate（ REBO3） is a kind of potential luminescence and nonlinear optics materials. The light yield of LuBO3： Ce^3 ＋crystals with calcite type is 26000 Ph·Mev- 1which is about 3 and 135 times larger than of Bi4Ge3O12 and PbWO4,respectively. In addition,these crystals demonstrate several excellent scintillation properties and physical stability,such as fast decay time（ - 33 ns） and nonhygroscopy. However,it is very difficult to grow large size and pure LuBO3 single crystals because of the phase transitions among polymorphs with calcite,vaterite and high temperature vaterite phases. Herein,clear crystal structures are urgent needed in explaining its luminescence properties,and clear relationships between the composition-crystal structure-properties are critical important in the preparation and growth of single crystals. Herein,we summarized the studies of crystal structures and phase transitions of REBO3,and put forward some views in the course of future research.
出处
《中国稀土学报》
CAS
CSCD
北大核心
2014年第4期385-396,共12页
Journal of the Chinese Society of Rare Earths
基金
国家自然科学基金项目(11104298
5033250
U1332202)
中国科学院上海硅酸盐研究所科技创新项目(Y34ZC130G)
中国科学院透明光功能无机材料重点实验室开放基金资助
关键词
稀土正硼酸盐
结构
相变
rare-earth borate
crystal structure
phase transition
