钨酸铅晶体着色问题的实验研究  

Experimental Study on the Coloration of PbWO_4 Crystal

作　　者：王绍华[1] 沈定中[1] 任国浩[1] 倪海洪[1] 吴皓[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》1999年第6期847-852,共6页Journal of Inorganic Materials

摘　　要：本文对PbWO4（PWO）晶体的着色问题进行了实验研究．以PbO和WO3粉体为原料采用改进的Bridgman法生长的PWO晶体会呈现出浅黄色，通过对实验现象的分析，提出PWO晶体中同时存在O缺位和Pb缺位．其中，O缺位是导致PWO晶体350nm透过率低的原因，Pb缺位是产生420nm吸收带使晶体着色的根源．Based on the experiments, some coloration phenomena in PbWO4 crystals grown from the mixture of PbO and WO3 powders by a modified Bridgman method were reported. Through analyzing these experimental phenomena, it was proposed that both defects of VO and VPb exist in the PbWO4 crystals, and that Vo leads to the decrease of transmission at 350nm whereas the existence of VPb is the main cause which results in the coloration of the crystal and absorption band at 420nm.

关 键 词：晶体 着色 晶体缺陷 钨酸铅 

分 类 号：O77[理学—晶体学] TQ134.33[化学工程—无机化工]