Zhang Haifeng
IEEE Trans Ultrason Ferroelectr Freq Control. 2013 Jul;60(7):1453-66. doi: 10.1109/TUFFC.2013.2717.
Optimal cuts to determine the third-order piezoelectric constants and electrostrictive constants of langasite single crystals by the resonator method are proposed. By selecting several langasite resonators with optimal cut angles and measuring their electroelastic effects, third-order piezoelectric constants and electrostrictive constants of langasite single crystals may be extracted. The numerical method to search these optimal cut angles is presented. The methodology has been validated by finite element analysis. This method will simplify traditional methods used to determine the third-order piezoelectric and electrostrictive constants for langasite single crystals and could potentially produce more accurate results. The method could also be used to determine the third-order piezoelectric and electrostrictive constants for other crystals with trigonal 32 symmetry.
提出了通过谐振器法确定硅酸镧镓单晶三阶压电常数和电致伸缩常数的最佳切割方式。通过选择几个具有最佳切割角度的硅酸镧镓谐振器并测量其电弹性效应，可以提取硅酸镧镓单晶的三阶压电常数和电致伸缩常数。给出了搜索这些最佳切割角度的数值方法。该方法已通过有限元分析得到验证。此方法将简化用于确定硅酸镧镓单晶三阶压电和电致伸缩常数的传统方法，并有可能产生更准确的结果。该方法还可用于确定具有三角32对称性的其他晶体的三阶压电和电致伸缩常数。
