压电双晶片参数及温度特性的动态测试方法

The Method of Dynamic Measurement for Piezoelectric Parameters and the Dependence of Temperature of Piezoelectric Bimorphs

本文提出一种压电材料参数动态测试模型 ,用于测量压电双晶片的几个主要材料参数 :压电应变常数 d31 、机电耦合系数 k31 、介电常数ε33T、弹性柔顺系数 s1 1 E及材料参数的温度特性。本文的这种测量方法不同于通常的由标准试样测量压电材料参数的方法 ,是直接由一种实用元件—压电双晶片 (非标准试样 )测量压电材料的参数。文中详细描述了测试原理、测试步骤及一种实际试样的测试结果。理论与实验结果表明

In this paper, the dynamic measuring model and method of piezoelectric parameters of piezoelectric bimorphs have been constituted. By this method, many parameters, for example, the piezoelectric constant d 31 , the electromechanical coupling constant k 31 ,the dielectric constant ε T 33 ,the elastic compliance constant s 11 E, and their dependence on temperature, can be gained. By contrast with common methods which measure piezomaterial parameters using standard samples, as we normally use, this new method uses a practical sample\|piezoelectric bimorphs. The measuring principle, measuring steps, and the experimental values of a typical example of piezoceramic bimorphs are described in detail in this paper. The principle and the results gained by experiment viladate the availability of this method.