CAS晶体生长与习性研究  

Study on the Growth and Habit of Calcium Aluminate Silicate Single Crystals

作　　者：龙勇[1] 于明晓[1] 石自彬[1] 丁雨憧[1] 王佳[1] 徐扬[1] 付昌禄[1] LONG Yong;YU Mingxiao;SHI Zibin;DING Yuchong;WANG Jia;XU Yang;FU Changlu(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：《压电与声光》2018年第2期178-181,共4页Piezoelectrics & Acoustooptics

基　　金：中国电子科技集团公司第二十六研究所所控基金资助项目(26-1507)

摘　　要：采用中频感应上称重提拉技术对Ca_2Al_2SiO_7(CAS)压电晶体进行了生长,研究了不同转速及生长方向下晶体的生长习性,从理论上分析了转速和生长方向对晶体形貌的影响。结果表明,晶体外形随转速的增加,其形貌由圆柱状变为正方形,再变为长方形,当转速到一定临界值时,晶体呈多晶状;随晶体生长方向的不同,晶体有不同的显露方向,并都有强的显露面(001)。对晶体不同显露方向进行了X线衍射分析,且对(001)面进行回摆测试。结果表明,晶体结构完整,结晶性能好。The calcium aluminate silicate(Ca 2Al 2SiO 7,CAS)piezoelectric crystal was grown by the up-weighing Czochralski(CZ)method with the radio frequency heating.The growth habit of CAS crystals at different rotation rate and growth direction was studied.The effects of the rotation and growth direction on the morphology of CAS crystals were analyzed theoretically.It can be found that the morphology of CAS crystal was changed from round column to square and rectangular solid with the rotation rate increasing.The crystal presented polycrystalline morphology when the rotation rate reaches threshold limit value.The CAS crystal has different manifest facet with different growth direction,and had very strong manifest facet(001)during the growth process.The different manifest facets were characterized by X-ray diffraction spectroscopy analysis,and rocking test for(001)facet was carried out.The results indicated that the as-grown crystal structure was complete and the crystalline property was good.

关 键 词：压电传感器 硅酸铝钙(Ca 2Al 2SiO 7) 提拉法 高温 生长习性 

分 类 号：TM221[一般工业技术—材料科学与工程] TN384[电气工程—电工理论与新技术]