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碘化铅（PbI₂）单晶体的生长研究

Study on Growth of Lead Iodide （PbI₂） Single Crystal

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【Author】 ZHU Xing-hua~(1, 2),ZHAO Bei-jun~1,ZHU Shi-fu~1, JIN Ying-rong~3, ZHAO Xin~3,YANG Xiao-long~2 (1. Department of Materials Science, Sichuan University, Chengdu 610064, China; 2. Institute of Applied Physics, Xihua University, Chengdu 610039, China; 3. School of Materials Science and Engineering, Xihua University, Chengdu 610039, China)

【机构】四川大学材料科学系；西华大学材料科学与工程学院；西华大学应用物理研究所成都610064西华大学应用物理研究所；成都610039；成都610064；成都610039；

【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。更多还原

【Abstract】 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 15mm×30mm has been grown by vertical Bridgman method. The as grown crystal is intact and translucent with yellow appearance,and its resistivity is about 10¹⁰Ω·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.更多还原