Characterization of porous piezoelectric ceramics: The length expander case

Journal Article · Mon Dec 01 04:00:00 EST 1997 · Journal of the Acoustical Society of America

DOI:https://doi.org/10.1121/1.420143· OSTI ID:565113

Gomez Alvarez-Arenas, T E; Montero de Espinosa, F ^[1]

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1. Instituto de Acustica, C.S.I.C., C/Serrano 144, 28006 Madrid (Spain)

Porous piezoelectric ceramics and 0{endash}3/3{endash}3 connectivity piezoelectric composites are normally characterized following the Standards on Piezoelectricity. Nevertheless, these materials are not homogeneous and losses are significant. New constitutive and wave equations have been obtained recently for these kind of materials. The objective of this paper is to derive new definitions for the electromechanical coupling coefficients and a suitable characterization procedure according to the new constitutive and wave equations previously mentioned. In particular, the case of the length expander bar mode is analyzed in detail. The study of resonant elements requires the use of suitable boundary conditions. In this case the boundary conditions are borrowed from the theory of poroelasticity and extended for a piezoelectric material. Finally the procedure is applied to characterize a commercial porous piezoelectric ceramic. {copyright} {ital 1997 Acoustical Society of America.}

• OSTI ID: 565113
• Journal Information: Journal of the Acoustical Society of America, Journal Name: Journal of the Acoustical Society of America Journal Issue: 6 Vol. 102; ISSN 0001-4966; ISSN JASMAN
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CERAMICS
ELECTROMECHANICS
PIEZOELECTRICITY
POROUS MATERIALS
RESONANCE
STANDARDS
WAVE EQUATIONS