Theoretical and experimental investigations of thickness- stretch modes in 1-3 piezoelectric composites

Bulk piezoelectric ceramics operating in thickness-stretch (TSt) modes have been widely used in acoustic-related devices. However, the fundamental TSt waves are always coupled with other modes, and the occurrence of these spurious modes in bulk piezoelectric ceramics affects its performance. To supp...

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Bibliographic Details
Published in:IOP conference series. Materials Science and Engineering 2015-12, Vol.103 (1), p.12045
Main Authors: Yang, Z T, Zeng, D P, He, M, Wang, H
Format: Article
Language:English
Subjects:
Acoustic coupling
Bulk sampling
Ceramics
Composite materials
Coupled modes
Electrical impedance
Joining
Mathematical analysis
Piezoelectric ceramics
Piezoelectricity
Thickness
Three dimensional
Vibration mode
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Summary:Bulk piezoelectric ceramics operating in thickness-stretch (TSt) modes have been widely used in acoustic-related devices. However, the fundamental TSt waves are always coupled with other modes, and the occurrence of these spurious modes in bulk piezoelectric ceramics affects its performance. To suppress the spurious modes, 1-3 piezoelectric composites are promising candidates. However, theoretical modeling of multiphase ceramic composite objects is very complex. In this study, a 1-3 piezoelectric composite sample and a bulk piezoelectric sample are fabricated. The electrical impedance of these two samples are compared. A simple analytical TSt vibration mode from the three dimensional equations of linear piezoelectricity is used to model the performance of 1-3 piezoelectric composites. The theoretical results agree well with the experimental results.
ISSN:1757-8981
1757-899X
DOI:10.1088/1757-899X/103/1/012045