Polycrystal Synthesis and Single Crystal Growth of Pbl2

摘要：

High-pure and single-phase PbI2 polycrystal was synthesized by Pb and I elements (99.9999％) according to the stoichiometry of PbI2 with excess of 0.3％ Pb through modified two-zone vapor-transporting method (MTVM). The synthesis reaction was carried in a special quartz ampoule to prevent the ampoule exploding by controlling the temperature. With presynthesized polycrystal, an integral PbI2 single crystal with 15 mm in diameter and 25 mm in length was grown by vertical Bridgman method (VBM). The asgrown crystal was characterized by X-ray diffraction (XRD), ZC36 megger and Infrared (IR) spectrophotometers. XRD analysis indicated the structure of PbJ.2 crystal is 2H with hexagonal space group of P3ml, the lattice constants of a and c are 0.4560 nm and 0.6979 nm, respectively. The IR transmittance of a sample of 2.5 mm thickness is about 40％ in the range from 4000 to 400 cm-1. Resistivity of the crystal is about 1013 Ω cm magnitude. These results demonstrate that the quality of the asgrown crystal is high enough for applications of room temperature nuclear radiation detectors.

关键词： Pbl2 polycrystal synthesis MTVM crystal growth VBM

作者: Xin Zhao Yingrong Jin Xinghua Zhu

作者单位: Aviation Engineering College, Civil Aviation Flight University of China, Guanghan 618307 China School of Materials Science and Engineering, Xihua University, Chengdu 610039 China Department of Optoelectronic Technology, Chengdu University of Information Technology,Chengdu 610225

会议类型: 国际会议

会议名称: 2010 International Conference on Advanced Mechanical Engineering(2010年先进机械工程国际学术会议 AME 2010)

会议地点: 洛阳

会议语种:英文

页码: 720-723

在线出版日期: 2010-09-04（万方平台首次上网日期，不代表论文的发表时间）