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无机材料学报

无机材料学报

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PbF2晶体失透问题的研究

李泽逵; 任国浩; 沈定中; 陈晓峰; 殷之文   

  1. 中国科学院上海硅酸盐研究所 上海 200050
  • 收稿日期:2001-04-09 修回日期:2001-05-30 出版日期:2002-05-20 网络出版日期:2002-05-20

Transmission Loss of Lead Fluoride Crystals

LI Ze-Kui; REN Guo-Hao; SHEN Ding-Zhong; CHEN Xiao-Feng; YIN Zhi-Wen   

  1. Shanghai Institute of Ceramics; Chinese Academy of Sciences; Shanghai 200050; China
  • Received:2001-04-09 Revised:2001-05-30 Published:2002-05-20 Online:2002-05-20

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摘要： 对PbF2晶体在生长过程中的失透以及晶体在加工和储运过程中发生的失透现象进行了研究,认为晶体在生长过程中的失透是由于晶体生长时氧进入PbF2晶格中由八个氟原子所构成的六面体的中心位置,而晶体在加工和储运过程中的失透则是由于接触了水造成晶体表面部分PbF2由立方相转变为斜方相小晶粒所致．

关键词: PbF2晶体, Bridgman－Stockbarger法, 相变

Abstract: The transmission loss of PbF2 crystals, happened in their growth process and in the period of machining, storing and carrying, was investigated. The results show that the transmission loss in the growth process happens when oxygen atoms occupy the center of the PbF2 crystal lattice and the transmission loss happens in the period of machining, storing and carrying when β→α phase transition occurs on the surfaces of the crystals after they contact with water.

Key words: PbF2 crystal, Bridgman-Stockbarger method, phase transition

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