汽相平衡扩散时LiNbO_3晶体的改性  

Modification of LiNbO_3 Crystal Composition by Vapor Phase Transport Equilibration Technique

作　　者：程宁[1] 华王祥[1] 徐月英 谭浩然[1] 

机构地区：[1]中国科学院上海硅酸盐研究所

出　　处：《无机材料学报》1994年第3期268-274,共7页Journal of Inorganic Materials

摘　　要：本文从ＬｉＮｂＯ３晶体的宽固溶特性出发，采用汽相平衡扩散（ＶＴＥ）方法，摸索出具体改善ＬｉＮｂＯ３组成的实验条件，研制出用于扩散的扩散源坩埚，对一系列同成分ＬｉＮｂＯ３晶体进行了改性研究，结果表明，经本方法处理的ＬｉＮｂＯ３晶体的均匀性、一致性得到大大的提高，并获得了均匀富锂的ＬｉＮｂＯ３晶体，能够很好地满足集成光学需要．On the basis of the wide solid-solution range of LiNbO3, a method for improving LiNbO3 homogeneity and uniformity is studied. This process can be accomplished using Vapor phase transport equilibration technique (VTE) in which LiNbO3 crystals are annealed in special crucibles, LiNbO3 crystals of higher quality are obtained with a Li2O composition variation within ±0.02mol%. Furthermore, Li-rich LiNbO3 substrates with good compositional homogeneity can be produced successfully.

关 键 词：晶体 汽相平衡 扩散 铌酸锂 改性 

分 类 号：O614.111[理学—无机化学]