钛酸铋钠-钛酸钡铁电单晶纵向压电效应取向性质研究

摘要

The orientation dependence of piezoelectric properties was calculated for 0.95 Na0.5Bi0.5) TiO3-0.05BaTiO3 single crystal based on the full matrix properties.The longitudinal piezoelectric parameters had the same orientation property in (100) and (010) planes.The maximum values both appear along the [-001] direction,which is 360 pC/N;at (001),the piezoelectric parameter is independent of the plane and orientation,show isotropy,which values are 360 pC/N.The piezoelectric parameters in the plane (110) also have significant anisotropy,the maximum value is 209.2 pC/N,d33 is 88.1 pc/N along[111-] direction.%基于无铅铁电单晶钛酸铋钠-钛酸钡(0.95 (Na0.5Bi0.5)TiO3-0.05BaTiO3)的全矩阵系数,系统地研究了晶体纵向压电效应的取向性质.在(100)面和(010)面上纵向压电参数d33的取向变化规律完全相同,最大值均出现在[001]方向,其值为360pC/N;而在(001)面上,压电参数的大小与取向无关,表现出各向同性,其值均为360pC/N.在(110)面上压电参数也具有明显各向异性,最大值为209.2pC/N;沿[111]方向的d33为88.1pC/N.