布里奇曼法生长的Li_2B_4O_7晶体的X射线形貌观察

X-ray Topographic Study on the Defects in Bridgman-grown Li_2B_4O_7 Crystal

本文通过Ｘ射线衍射形貌术观察了布里奇曼法（ＢＲ）生长和加速坩埚旋转的布里奇曼法（ＡＣＲＴ－ＢＲ）生长的Ｌｉ＿２Ｂ＿４Ｏ＿７单晶中的缺陷。晶体中的缺陷以亚晶界和位错为主。同时结合晶体生长和晶体结构对缺陷的成因及消除方法进行了讨论。

Defects in the Bridgman and accelerated crucible rotation technique-Bridgman(ACRT-BR)grown Li_2B_4O_7 single crystals have been observed by X-ray topography.Subboundaries and dislocations are the main defects in crystal.The origin of and the way to avoid them have been discussed in view of the crystal growth and structure.