铌酸锂晶体锂含量的精确测量研究  

Study on Precise Determination of Lithium Content in the LiNbO_3 Crystals

作　　者：杨金凤[1,2] 黄存新[1,3] 孙军[1,2] 徐海霞[1,2] 张玲[1,2] 许京军[1] 

机构地区：[1]南开大学弱光非线性光子学教育部重点实验室,天津300071 [2]南开大学物理科学学院,天津300071 [3]北京中材人工晶体研究院有限公司,北京100018

出　　处：《人工晶体学报》2014年第4期738-742,共5页Journal of Synthetic Crystals

基　　金：国家自然科学基金(61108055);高等学校博士学科点专项科研基金(20090031120037)

摘　　要：采用碳酸锂粉末和五氧化二铌粉末通过烧结制备了氧化锂含量为47.84mol%~50.50mol%的铌酸锂多晶粉末,并烧结为陶瓷片样品。然后利用精密数字电容电桥测量了这些样品的介电常数随温度的变化,得到了铌酸锂的居里温度Tc与锂含量的关系。Series of lithium niobate polycrystalline powders with 47. 84mol%-50. 50mol% Li2O were prepared by calcining Li2CO3and Nb2O5powder mixture,sintered ceramic disks were prepared by these polycrystalline powders as measuring specimens. Temperature dependence of dielectric constants of these specimens was tested using the precise digital capacitance bridge,and then the correlation between Curie temperature and the lithium content of lithium niobate crystal is determined.

关 键 词：铌酸锂 介电常数 居里温度 锂含量 

分 类 号：O77[理学—晶体学]