Piezoelectric and pyroelectric properties of conductive polyethylene oxide-lead titanate composites

H. Khanbareh, S. Van Der Zwaag, W. A. Groen

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Polymer-ceramic composites with pyroelectric sensitivity are presented as promising candidates for sensing applications. Selection of the appropriate ceramic filler and the polymer matrix is one of the key parameters in the development of optimized materials for specific applications. In this work lead-titanate (PT) ceramic particulate is incorporated into a polymer matrix, polyethylene oxide (PEO) with a relatively high electrical conductivity to develop sensitive and at the same time flexible composites. PT particles are dispersed in PEO at varying volume fractions, and composite materials are cast in the form of films to measure their dielectric, piezoelectric and pyroelectric properties. From these data the piezoelectric voltage coefficients as well as pyroelctric figures of merit of the composite films have been determined. In order to determine the effect of electrical conductivity of the polymer matrix on the poling efficiency and the final properties, a poling study has been performed. Improving the electrical conductivity of the polymer phase enhances the poling process significantly. It is found that both the piezoelectric and the pyroelectric figures of merit increase with concentration of PT. PT-PEO composites show superior pyroelectric sensitivity compared to other composites with less conductive polymer matrices.

Original languageEnglish
Article number045020
JournalSmart Materials and Structures
Volume24
Issue number4
DOIs
Publication statusPublished - 1 Apr 2015

Keywords

  • composites
  • piezoelectricity
  • poling efficiency
  • pyroelectricity

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Condensed Matter Physics
  • Civil and Structural Engineering
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering
  • Signal Processing

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