High-performance 1-3-type lead-free piezo-composites with auxetic polyethylene matrices

V. Yu Topolov, C. R. Bowen

Research output: Contribution to journalArticle

14 Citations (Scopus)
129 Downloads (Pure)

Abstract

High piezoelectric sensitivity and large hydrostatic parameters are discussed for two 1-3-type single crystal/auxetic polymer composites. The single crystal components selected are based on lead-free (K,Na)(Nb,Ta)O3 and (Li,K,Na)(Nb,Ta)O3 solid solutions, and the auxetic polymers are characterised by Poisson's ratios -0.83 ≤ v ≤ -0.29. The composites examined exhibit advantageous properties over conventional lead-based piezo-active composites and ceramics such as high longitudinal piezoelectric coefficient g33∗∼(102-103) mV · m/N, squared figure of merit (Q33∗)2∼10-11 Pa-1, hydrostatic piezoelectric coefficient gh∗∼(102-103) mV · m/N and squared figure of merit (Qh∗)2∼(10-11-10-10) Pa-1. The composites also demonstrate an infinitely large anisotropy of piezoelectric coefficients d3j∗.

Original languageEnglish
Pages (from-to)265-268
Number of pages4
JournalMaterials Letters
Volume142
Early online date10 Dec 2014
DOIs
Publication statusPublished - 1 Mar 2015

Keywords

  • Composite materials
  • Elastic properties
  • Ferroelectrics
  • Piezoelectric materials
  • Polymers

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