以K_2O助熔剂生长LiNbO_3晶体的研究  

Study on Growth of LiNbO_3 Crystals with the Addition of K_2O to the Melt

作　　者：吕衍秋[1] 袁多荣[1] 魏学成[1] 吕孟凯[1] 许东[1] 王重海[2] 孟宪谦[2] 

机构地区：[1]山东大学晶体材料研究所,济南250100 [2]山东工业陶瓷研究设计院,淄博255031

出　　处：《硅酸盐通报》2004年第2期77-79,共3页Bulletin of the Chinese Ceramic Society

基　　金：国防科工委军工配套项目;国家自然科学基金项目资助(601780).

摘　　要：通过在同成分的熔体中加入0～10％(质量分数)的K2O提拉法生长了近化学计量比的LiNbO3晶体。用测量晶格常数和居里温度的方法测定了[Li]/[Nb],结果表明加入到同成分的熔体中的K2O的量决定了晶体中的[Li]/[Nb]。对这种方法生长的LiNbO3晶体的缺陷和畴结构进行了分析和研究。Lithium niobate single crystals with near - stoichiometric composition were grown by the Czochralski method with the addition of K2O to the congruent melts in a concentration between 0 to 10wt%. The ratio of Li to Nb was determined by means of lattice parameters and Curie temperature. The data presented in this work show that the ratio of Li to Nb can be controlled by the additive amount of K2O to the congruent melt. Moreover, the domain structure and defects of LiNbO3 were studied.

关 键 词：铌酸锂 化学计量比 提拉法 晶格常数 质量分数 LINBO3晶体 助熔剂 光学性能 

分 类 号：O734[理学—晶体学] O781