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Characterization of piezoceramics

机译:压电陶瓷的表征

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摘要

A 3-D approach to piezoelectric material characterization, based on the assumption that the coordinate axes are pure mode propagation directions, is described. In this case the general equations simplify and an analytical solution can be achieved. For two geometrical shapes (rectangular and cylindrical), stress and strain tensor components and the electrical impedance of the sample are obtained. These 3-D equations show that the wave velocities and permittivity are intrinsic parameters of the medium and do not depend on either the sample geometry or the mode that is considered. This was not true for the 1-D models where the wave velocities and permittivity are different for each of the modes or geometries.
机译:描述了基于坐标轴为纯模式传播方向的压电材料表征的3-D方法。在这种情况下,通用方程式得以简化,并且可以实现解析解。对于两个几何形状(矩形和圆柱形),可以获得应力和应变张量分量以及样品的电阻抗。这些3-D方程表明,波速和介电常数是介质的固有参数,与样本几何形状或所考虑的模式无关。对于其中每个模式或几何形状的波速和介电常数不同的一维模型,情况并非如此。

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