文档介绍：硅酸盐学报· 1996 ·2010年正交结构与黄铜矿结构LiGaSe2的制备及结构表征马天慧1,2,杨春晖1,朱崇强1,孙亮1,任玉兰2(1. 哈尔滨工业大学化工学院,哈尔滨 150001;2. 牡丹江师范学院化学系,黑龙江牡丹江 157012) 摘要:利用水平单温区管式电阻炉,合成了LiGaSe多晶材料,并用X射线衍射(X-ray diffraction,XRD)和Raman光谱对其结构进行了表征。XRD谱表明:LiGaSe多晶材料具有正交结构或黄铜矿结构,2种结构的多晶材料都是高纯的且结晶性良好。在合成过程中,最后阶段的恒温温度及降温速率将决定LiGaSe的物相。通过Raman谱分析,找到2种类闪锌矿振动峰,其中低频峰与Ga—Se键的晶格振动有关,而高频峰与Li—Se键的振动有关。2种结构LiGaSe中Li—Se键和Ga—Se键力常数存在微小差异,导致2种Raman谱谱峰发生移动。关键词:硒化镓锂;正交结构;黄铜矿结构;Raman光谱中图分类号:TQ171 文献标志码:A 文章编号:0454–5648(2010)10–1996–05 PREPARATION AND STRUCTURE CHARACTERISTICS OF ORTHORHOMBIC AND CHAL COPYRITE LiGaSe2MA Tianhui1,2,YANG Chunhui1,ZHU Chongqiang1,SUN Liang1,REN Yulan2(1. School of Chemical Engineering and Technology, Harbin Institute of Technology, Harbin 150001; 2. Department of Chemistry, Mudanjiang Normal University, Mudanjiang 157012, Heilongjiang, China) Abstract: LiGaSe2 polycrystalline materials were synthesized using a one-temperature horizontal tube furnace. Their structures were characterized by the X-ray powder diffraction (XRD) and Raman spectra. The XRD results reveal that the two kinds of LiGaSe2polycrystalline materials with orthorhombic and chalcopyrite structures are single phase and have good crystallization. It is proved that the final soaking temperature and decreasing-temperature rate determine the phase transformation of LiGaSe2. Two sphalerite-like vibration peaks were identified for Raman spectra