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无机材料学报

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大尺寸Y:PbWO4晶体的坩埚下降法生长与光学均匀性研究

宫波; 沈定中; 任国浩; 张海斌; 殷之文   

  1. 中国科学院上海硅酸盐研究所 上海 200050
  • 收稿日期:2001-04-04 修回日期:2001-05-16 出版日期:2002-03-20 网络出版日期:2002-03-20

Growth and Optical Uniformity of Large Size Y:PbWO4 Crystal Grown by the Bridgman Method

GONG BO; SHEN Ding-Zhong; REN Guo-Hao; ZHANG Hai-Bin; YIN Zhi-Wen   

  1. Shanghai Institute of Ceramics; Chinese Academy of Sciences; Shanghai 200050; China
  • Received:2001-04-04 Revised:2001-05-16 Published:2002-03-20 Online:2002-03-20

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摘要： 报道了大尺寸Ｙ：ＰｂＷＯ４晶体的坩埚下降法生长工艺，讨论了影响晶体生长的主要 因素．探讨了消除晶体开裂、抑制晶体组分过冷的工艺措施，成功地生长出无宏观缺陷的大尺 寸Ｙ：ＰｂＷＯ４晶体，尺寸达５２ｍｉｎ×５２ｍｍ×２５０ｍｍ．同时，对实验样品沿晶体生长方向不同部 位的横向透过率及发射光谱进行了测试，结果表明，坩埚下降法生长的大尺寸Ｙ：ＰｂＷＯ４晶体 具有较好的光学均匀性．

关键词: 大尺寸, Y:PbWO4晶体, 生长, 均匀性

Abstract: The crystal growth technique of large size Y:PbWO4 crystal by the Bridgman method was discussed. The technical methods to eliminate cracks of the crystal and constitutional super- cooling were presented. Y:PbWO4 crystal with the size of 55mm×55mm×250mm was successfully made. The transmittance spectra and radioluminescence spectra at different positions along crys- tal growth orientation were measured and studied. The results show that the large size Y:PbWO4 crystal has good optical uniformity.

Key words: large size, Y:PbWO4 crystal, growth, uniformity

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