New aspect-ratio effect in three-component composites for piezoelectric sensor, hydrophone and energy-harvesting applications

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

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)
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Abstract

In this paper the influence of the aspect ratio of ferroelectric ceramic inclusions on the piezoelectric performance and hydrostatic parameters of novel three-component 1-3-type composites based on relaxor-ferroelectric single crystals is studied. Differences in the microgeometry of the ceramic/polymer matrix with 0-3 connectivity and the presence of two piezo-active components with contrasting piezoelectric and mechanical properties lead to a considerable dependence of the piezoelectric performance, hydrostatic response and related parameters of the 1-0-3 composite on the aspect ratio and volume fraction of the aligned ceramic inclusions. The influence of the elastic anisotropy of the ceramic/polymer matrix on composite properties with changes in the aspect ratio and volume fraction of the inclusions is discussed. The piezoelectric performance of the 1-0-3 0.67Pb(Mg1/3Nb2/3)O3-0.33PbTiO3 single crystal/modified PbTiO3 ceramic/polymer composite suggests that such a material is of interest for both sensor and energy-harvesting applications due to large values of the piezoelectric coefficient g33∗∼400-550 mV m/N, squared figure of merit d33∗g33∗∼10-10 Pa-1 and related anisotropy factor d33∗g33∗/(d31∗g31∗)∼8-9. Such composites can also be used in hydrophone applications due to their large hydrostatic parameters, e.g., dh∗∼102 pC/N, gh∗∼100-160 mV m/N and dh∗gh∗∼10-11 Pa-1.

Original languageEnglish
Pages (from-to)94-103
Number of pages10
JournalSensors and Actuators A-Physical
Volume229
Early online date28 Mar 2015
DOIs
Publication statusPublished - 15 Jun 2015

Keywords

  • Ferroelectric ceramic
  • Piezo-active composite
  • Piezoelectric sensitivity
  • Polymer
  • Relaxor-ferroelectric single crystal

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