掺镱氟磷酸钙(Yb∶FAP)晶体的生长  

THE GROWTH OF Yb_DOPED CALCIUM FLUORAPATITE CRYSTAL

作　　者：杨培志[1] 邓佩珍[1] 柴耀[1] 徐军[1] 陈伟[1] 王浩炳[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》1999年第2期219-223,共5页Journal of The Chinese Ceramic Society

基　　金：国家高技术"863"项目;国家自然科学基金

摘　　要：用高频感应提拉法生长了掺Ｙｂ３＋氟磷酸钙（Ｙｂ∶ＦＡＰ）晶体，获得了理想的生长工艺参数．为消除晶体中通常存在的宏观缺陷，研究了晶体的退火条件．生长的晶体毛坯尺寸为２２ｍｍ×４５ｍｍ．对晶体进行了初步的位错观察，并估算了晶体的位错密度．Yb_doped calcium fluorapatite single crystals were successfully grown by the Czochralski method. Optimal growth parameters were found, and post annealing condition was studied as well. The crystal boule which is 22 mm in diameter and 45 mm in length was presented. The dislocations were preliminarily observed by chemical etching and optical microscope. On (0001), the dislocation pattern is hexagonal with six sides of the hexagon on {101 0}plane, and on (101 0), the dislocation pits are triangular in shape, with etch_pit rows aligned along the direction. The dislocation density was estimated.

关 键 词：掺镱 氟磷酸钙 晶体生长 退火 位错 

分 类 号：O78[理学—晶体学] O772