GaPO_4晶体弹性与压电性能的研究  

Study on Elastic and Piezoelectric Properties of GaPO_4 Crystal

作　　者：王越[1] 孙云旭[1] 蒋毅坚[1] 杨赤[2] 

机构地区：[1]北京工业大学应用数理学院,北京100022 [2]中国科学院大气物理研究所,北京100028

出　　处：《人工晶体学报》2001年第2期178-184,共7页Journal of Synthetic Crystals

基　　金：北京工业大学青年教师基金资助项目

摘　　要：本文首先绘制了GaPO4 晶体在 (10 0 )、(0 10 )、(0 0 1)三个主晶面内慢度分布曲线 ,计算了声速的最大值 ,并与水晶进行了比较 ,发现GaPO4 晶体的声速普遍小于水晶的声速 ;其次还探讨了GaPO4 晶体压电系数d11及机电耦合系数k11随空间方向变化的规律 ,得到了GaPO4 晶体d11、k11的最大值及其方向 ,并分别和水晶进行了比较 ,发现GaPO4 晶体的d11和k11都远大于水晶的。这些结果将对GaPO4 晶体在压电器件和声光器件的设计、开发及利用等方面具有一定的理论指导作用。In this paper,the curves of slowness in (100),(010) and (001) for GaPO 4 have been plotted.The maximum of acoustic velocities and their directions have also been gained,and compared with that of α SiO 2.Crystal orientation dependence of piezoelectric constant d 11 and electromechanical coupling factor k 11 have been calculated phenomenologically.The maximum of longitudinal piezoelectric constant d 11 and electromechanical coupling factor k 11 are obtained.The orientation was also determined.It is found that the d 11 and k 11 of GaPO 4 are much larger than that of SiO 2 and the velocity of acoustic wave is smaller than that of SiO 2.These results will give certain directions for the use of GaPO 4 in piezoelectrical and acoustic optical devices.

关 键 词：压电材料 磷酸镓晶体 克里斯托夫方程 压电系数 机电耦合系数 弹性 压电性能 

分 类 号：O738[理学—晶体学] TM22[一般工业技术—材料科学与工程]