Abstract
The wide usage of piezoelectric plates in ultrasonics and communication systems has stimulated considerable interest in the determination of the resonant modes of vibration of these plates. Experimentally, it is possible to measure the frequency, the reactance, and the loss associated with modes that may occur in a plate of arbitrary geometry. The determination of these parameters are generally not sufficient to identify a particular mode of vibration. The use of electrostatic probe measurements and x-ray diffraction topography can be used to determine the actual particle displacements associated with the resonant modes. All of these measurements may be used to compliment and extend the present approximations to anisotropic-plate vibrations. This paper reviews the techniques for the measurement of frequency, displacement, and electrical parameters in piezoelectric plates. These measurements are compared with the results computed from Mindlin's first-order theory for rectangular AT-cut quartz plates.
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