铝酸钇晶体中的生长小面  

GROWTH FACET IN YTTRIUM ALUMINATE CRYSTALS

作　　者：李红军[1] 杨新波[1] 苏良碧[1] 赵广军[1] 钱小波[1] 周国清[1] 徐军[1] 

机构地区：[1]中国科学院上海光学精密机械研究所

出　　处：《硅酸盐学报》2008年第5期672-677,共6页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金(60607015)资助项目

摘　　要：采用提拉法生长了掺Ce、掺Yb和掺Mn的铝酸钇(YAlO3,YAP)晶体,晶体均完整透明,无肉眼可见的气泡、散射和包裹物等宏观缺陷。通过化学腐蚀和同步辐射白光形貌实验检测了YAP晶体中的生长小面缺陷。结果表明:晶体生长过程中,由于凸向熔体的固-液界面,造成了小面生长现象。沿[101]方向生长的YAP晶体中出现的小面为(102),(201),(121)和(121)奇异面。X射线摇摆曲线表征的结果表明:生长小面的存在严重破坏了晶体的微观结构完整性和均匀性,并导致了小角度晶界缺陷的产生。Ce-,Yb-and Mn-doped yttrium aluminate(YAlO3,YAP) crystals were successfully grown by the Czochralski method.The growth facet and related microscopic defects in YAP crystals were investigated by chemical corrosion method and synchrotron radiation topography experiments.The results show that the obtained crystals were transparent and had no macroscopic defects such as bubbles,scatters or inclusions.The solid-liquid interface used for growing these crystals has a conical shape,convex into the melt.Thus this in...

关 键 词：铝酸钇晶体 缺陷 生长小面 位错 小角晶界 

分 类 号：O782[理学—晶体学]