Role of matrix porosity and poisson's ratio in the design of high-sensitivity piezocomposite transducers

Pieter J. Swart, Marco Avellaneda

Research output: Contribution to journalConference articlepeer-review

Abstract

The inclusion of piezoceramic rods in a passive polymer can highly enhance the piezoelectric effect - a fact which has been exploited in the manufacturing of sensitive transducers. We analyze this phenomenon from the point of view of the theory of composite materials, focusing on the evaluation of dh, the electro-acoustic coupling coefficient, dhgh, the hydrophone figure of merit, and kh, the corresponding coupling factor measuring electro-mechanical energy conversion. In the limit of large elastic contrast (soft matrix, hard ceramic), this allows for a clear explanation of the decoupling effect of the composite on the electro-acoustic coupling coefficient, as well as the role played by the porosity and Poisson's ratio of the matrix phase.

Original languageEnglish (US)
Pages (from-to)59-66
Number of pages8
JournalAmerican Society of Mechanical Engineers, Aerospace Division (Publication) AD
Volume45
StatePublished - 1994
EventProceedings of the 1994 International Mechanical Engineering Congress and Exposition - Chicago, IL, USA
Duration: Nov 6 1994Nov 11 1994

ASJC Scopus subject areas

  • Mechanical Engineering
  • Space and Planetary Science

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