大尺寸Y方向钽酸镓镧压电晶体生长及性能研究  

Study on Growth and Properties of Large Size Y-Orientated Langatate Piezoelectric Crystal

作　　者：石自彬[1] 李和新[1] 龙勇[1] 丁雨憧[1] SHI Zibin;LI Hexin;LONG Yong;DING Yuchong(26th Institute of China Electronics Technology Group Corporation, Chongqing 400060, China)

机构地区：[1]中国电子科技集团公司第二十六研究所,重庆400060

出　　处：《人工晶体学报》2020年第6期1044-1047,共4页Journal of Synthetic Crystals

基　　金：国家重点研发计划(2016YFB0402701)。

摘　　要：成功采用提拉法生长了尺寸φ80 mm×100 mm的Y方向钽酸镓镧压电晶体,晶体整体透明、无包裹体。采用LCR电桥测量了晶体的相对介电常数,采用谐振-反谐振法测量了压电应变常数。研究了头尾之间性能差异性,头尾频率常数均匀性达到99.95%,表明晶体存在良好的性能均匀性。此外,还对(010)晶面进行了摇摆曲线和频率温度系数测试,测得FHMW和TCF值分别为38.5″、1.23ppm/K。Y-orientated langatate piezoelectric crystal with size of φ80 mm×100 mm was successfully grown by Czochralski method,which is transparent,inclusions-free.The relative dielectric constants and the piezoelectric strain constants were determined by an electric bridge and resonant-anti-resonant method.The performance difference between head and tail was studied.The uniformity of frequency constant has been determined to be 99.95%,which shows the excellent uniformity of the crystal.In addition,the swing curve and the temperature coefficient of frequency(TCF)were tested on(010)crystal facet.The FHMW and TCF values were 38.5″and 1.23ppm/K,respectively.

关 键 词：钽酸镓镧 提拉法 压电性能 

分 类 号：O731[理学—晶体学]