New orientation effect in piezo-active 1-3-type composites

V. Yu Topolov, C. R. Bowen, P. Bisegna, A. V. Krivoruchko

Research output: Contribution to journalArticle

15 Citations (Scopus)
34 Downloads (Pure)

Abstract

This paper demonstrates the influence of the mutual orientation of the poling direction of single-crystal and ceramic components on the properties of 1-0-3 composites containing two ferroelectric components and a piezo-passive polymer. Effective properties to be considered are hydrostatic piezoelectric performance, anisotropy of squared figures of merit and electromechanical coupling factors. We demonstrate that the elastic and piezoelectric anisotropy of the 0-3 connectivity ferroelectric ceramic/polymer matrix with prolate inclusions leads to large hydrostatic piezoelectric coefficients (dh∗ and gh∗) and squared figure of merit (dh∗gh∗) in a 1-0-3 0.67Pb(Mg1/3Nb2/3)O3-0.33PbTiO3 single crystal/(Pb1-xCax)TiO3 ceramic/araldite composite with x = 0.20-0.25. In this type of composite values of maxgh∗ ∼102 mV m/N and max(dh∗gh∗) ∼10-11 Pa-1 are achieved at specific volume-fraction and rotation-angle ranges due to a new orientation effect in the presence of a highly anisotropic 0-3 matrix. Such composites are of interest for sensor, actuator and energy-harvesting applications.

Original languageEnglish
Pages (from-to)187-195
Number of pages9
JournalMaterials Chemistry and Physics
Volume151
DOIs
Publication statusPublished - 1 Feb 2015

Keywords

  • Composite materials
  • Elastic properties
  • Ferroelectricity
  • Piezoelectricity

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