Piezoelectric sensitivity and hydrostatic response of novel lead-free 2–0–2 composites with two single-crystal components

V Yu Topolov, C. R. Bowen, A A Panich, A. N. Isaeva

Research output: Contribution to journalArticle

1 Citation (Scopus)
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Abstract

This paper reports the piezoelectric performance and important related hydrostatic parameters of 2–0–2 composites based on lead-free ferroelectric and piezoelectric single crystals with 4mm symmetry. We demonstrate that ferroelectric domain-engineered alkali niobate-tantalate based single crystals provide large values of the piezoelectric coefficients g3j and related parameters when used in a 2–0–2 composite system with a relatively wide range of volume fractions of single-crystal components. An ‘aspect-ratio effect’ as a result of the presence of inclusions of a piezoelectric Li2B4O7 single crystal in a polymer medium is studied for the first time for a case where the elastic compliance s12 in the single crystal/polymer layer of the composite passes through zero. It is observed that changes in the aspect ratio and volume fraction of the Li2B4O7 inclusions influence the hydrostatic piezoelectric coefficient gh , squared figure of merit dh gh and electromechanical coupling factor kh of the composite, and large values of gh ∼102 mV·m/N, dh gh ∼ (10−11–10−10) Pa−1 and kh ≈ 0.6–0.7 are achieved. A link between max kh and a change in sgns12 is first described for the 2–2-type composite, and a comparison of the hydrostatic parameters of the novel and related composites is made. The present results show the potential of lead-free 2–0–2 composites that are suitable for piezoelectric sensor, energy-harvesting and hydroacoustic applications.

Original languageEnglish
Pages (from-to)224-234
Number of pages11
JournalMaterials Chemistry and Physics
Volume201
Early online date19 Aug 2017
DOIs
Publication statusPublished - 1 Nov 2017

Fingerprint

hydrostatics
Lead
Single crystals
composite materials
sensitivity
single crystals
Composite materials
Ferroelectric materials
Aspect ratio
Volume fraction
Polymers
aspect ratio
inclusions
Electromechanical coupling
Underwater acoustics
Energy harvesting
Crystal symmetry
piezoelectric crystals
Alkalies
underwater acoustics

Keywords

  • Elastic properties
  • Hydrostatic parameters
  • Piezo-active composite
  • Piezoelectric properties
  • Single crystal

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Piezoelectric sensitivity and hydrostatic response of novel lead-free 2–0–2 composites with two single-crystal components. / Topolov, V Yu; Bowen, C. R.; Panich, A A; Isaeva, A. N.

In: Materials Chemistry and Physics, Vol. 201, 01.11.2017, p. 224-234.

Research output: Contribution to journalArticle

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