The Dispersion Relations of a Lithium Niobate Plate Covered with a Thin Isotropic Elastic Layer

The Dispersion Relations of a Lithium Niobate Plate Covered with a Thin Isotropic Elastic Layer

In this paper, we study wave propagation in a lithium niobate plate covered with a thin isotropic elastic layer. The three-dimensional piezoelectric elastic theory and isotropic elastic theory are used for the lithium niobate plate and the elastic layer, respectively. A transcendental frequency equa...

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Bibliographic Details
Published in:2022 16th Symposium on Piezoelectricity, Acoustic Waves, and Device Applications (SPAWDA) pp. 552 - 556
Main Authors: Liu, Chong, Huang, De-Jin, Zhen, Xiao-Hu
Format: Conference Proceeding
Language:English
Published: IEEE 11-10-2022
Subjects:
Cutoff frequency
Dispersion
Dispersion curve
Lithium niobate
Piezoelectric devices
Piezoelectricity
Propagation
Vibrations
Wave propagation
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Summary:In this paper, we study wave propagation in a lithium niobate plate covered with a thin isotropic elastic layer. The three-dimensional piezoelectric elastic theory and isotropic elastic theory are used for the lithium niobate plate and the elastic layer, respectively. A transcendental frequency equation that determines the dispersion relations of the waves is obtained. The dispersion relations are obtained and plotted. We analyzed the effect the elastic layer on the frequency of each vibration mode. Because of the existence of the elastic layer, the frequencies of the waves become smaller. In addition, the effect of the elastic layer increases with the increase of wave number. This analysis method and conclusion are usful to the design of piezoelectric devices with composite structure.
DOI:10.1109/SPAWDA56268.2022.10045925