Author(s): Gao Rong, Zhang Zhijun, Zhao Jingtai, Key Laboratory of Transparent Opto-Functional Inorganic Materials of Chinese Academy of Sciences, Shanghai Institute of Ceramics, Chinese Academy of Sciences, School of Materials Science and Engineering, Shanghai University
Pages: 385-396
Year: 2014 Issue:  4
Journal: Journal of the Chinese Rare Earth Society
Keyword:  rare-earth borate; crystal structure; phase transition;
Abstract: Rare-earth orthoborate( REBO3) is a kind of potential luminescence and nonlinear optics materials. The light yield of LuBO3: Ce3 +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.