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无机材料学报

无机材料学报

• 研究论文 • 上一篇    下一篇

铌酸钾锂晶体的生长与性能

徐家跃; 林雅芳; 范世Ji   

  1. 中国科学院上海硅酸盐研究所, 上海 200050
  • 收稿日期:1999-08-20 修回日期:1999-09-22 出版日期:2000-08-20 网络出版日期:2000-08-20

Growth and Properties of Potassium Lithium Niobate Single Crystals

XU Jia-Yue; LIN Ya-Fang; FAN Shi-Ji   

  1. Shanghai Institute of Ceramics; Chinese Academy of Sciences; Shanghai 200050; China
  • Received:1999-08-20 Revised:1999-09-22 Published:2000-08-20 Online:2000-08-20

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摘要： 使用坩埚下降法成功生长了尺寸为φ１０ｍｍ×５０ｍｍ、四方钨青铜结构、透明铌酸钾锂晶体，讨论了引起晶体开裂的主要原因，研究了该晶体的光透过性能和介电性能，室温下该晶体的介电常数ε３３＝１２７，ε１１＝３７６，居里温度为３８０℃．

关键词: 铌酸钾锂晶体, 坩埚下降法, 晶体生长, 性能

Abstract: Potassium lithium niobate single crystals of 10mm in diameter and up to 45mm in length were grown by the modified Bridgman technique. The transmittance spectrum and dielectric property of as-grown crystal were measured. The wafer of as-grown KLN crystal has good transmittance from 400nm to 800nm. Dielectric constants ε33 and ε11) at room temperature are 127 and 376 respectively. The cleavage face and chemical inhomogeneity are the main factors of cracking.

Key words: spotassium lithium niobate crystal, Bridgman method, crystal growth, property

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