碘化铅(PbI_2)单晶体的生长研究  

Study on Growth of Lead Iodide (PbI_2) Single Crystal

作　　者：朱兴华[1] 赵北君[1] 朱世富[1] 金应荣[2] 赵欣[2] 杨晓龙[3] 

机构地区：[1]四川大学材料科学系,成都610064 [2]西华大学材料科学与工程学院,成都610039 [3]西华大学应用物理研究所,成都610039

出　　处：《人工晶体学报》2005年第1期25-28,共4页Journal of Synthetic Crystals

基　　金：西华大学青年教师基金资助项目

摘　　要：本文以高纯Pb、I2 单质为原料,在特殊设计的密闭石英安瓿中,采用两温区气相输运方法成功合成出PbI2 多晶原料,避免了安瓿的爆炸。以此为原料,用垂直Bridgman法生长出尺寸为15mm×30mm的PbI2 单晶锭。该晶锭外观完整、呈橙黄色、半透明状,其电阻率为 1010Ω·cm量级,X射线衍射分析获得了 (001)面的四级衍射谱,表明该晶体是结构完整的单晶体,可用于探测器的制作。A single-phase PbI2 polycrystal has been successfully synthesized directly from Pb and I2 by two zone vapor transport method (TVM). The synthesis reaction was carried in a special quartz ampoule to prevent the ampoule from detonating by controlling the temperature. With the polycrystal, PbI2 single crystal with size of φ15 mm × 30 mm has been grown by vertical Bridgman method. The as grown crystal is intact and translucent with yellow appearance, and its resistivity is about 1010 Ω · cm magnitude. Four X-ray diffraction peaks of the (001) faces have been observed, which show that the as grown crystal is a perfect single crystal and can be used to manufacture detectors.

关 键 词：碘化铅 单晶体 BRIDGMAN法 衍射谱 X射线衍射分析 气相 单质 原料 多晶 安瓿 

分 类 号：O614.433[理学—无机化学] O782[理学—化学]