大尺寸Y:PbWO_4晶体的坩埚下降法生长与光学均匀性研究  

Growth and Optical Uniformity of Large Size Y:PbWO_4 Crystal Grown by the Bridgman Method

作　　者：宫波[1] 沈定中[1] 任国浩[1] 张海斌[1] 殷之文[1] 

机构地区：[1]中国科学院上海硅酸盐研究所,上海200050

出　　处：《无机材料学报》2002年第2期215-219,共5页Journal of Inorganic Materials

基　　金：国家自然科学基金(59732040)

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．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 supercooling were presented. Y:PbWO4 crystal with the size of 55mm x 55mm x 250mm was successfully made. The transmittance spectra and radioluminescence spectra at different positions along crystal growth orientation were measured and studied. The results show that the large size Y:PbWO4 crystal has good optical uniformity.

关 键 词：大尺寸 Y:PbWO4晶体 生长 钨酸铅 钨 坩埚下降法 光学均匀性 

分 类 号：O78[理学—晶体学]