Polarisation orientation effects and hydrostatic parameters in novel 2-2 composites basedon PMN-x PT single crystals

C.R. Bowen, V.Yu. Topolov

Research output: Contribution to journalArticle

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Abstract

Polarisation orientation effects in piezo-active composites based on relaxor-ferroelectric single crystals of (1-x)Pb(MgNb )O-xPbTiO open up new possibilities to vary the effective electromechanical properties and related parameters. In the present paper the hydrostatic performance of 2-2 parallel-connected single crystal / auxetic polymer composites is studied for x = 0.28 - 0.33 and two poling directions of the single-crystal component, [001] (4mm symmetry) and [011] (mm2 symmetry) in the perovskite unit cell. The effect of the orientation of the main crystallographic axes in the single-crystal component on the hydrostatic piezoelectric coefficients d*, e * and squared figure of merit d*g * is analysed for three rotation modes in single crystals and at various anisotropy of their piezoelectric and elastic properties. The role of the auxetic polymer component is emphasised in the context of the large hydrostatic parameters and anisotropy of squared figures of merit d*g* (j = 1, 2 and 3). The largest maximum values of d* and e* (1990 pC/N and 42.5 C/m, respectively) are achieved in the composite based on [011]-poled 0.71Pb(MgNb)O-0.29PbTiO
LanguageEnglish
Pages21-28
Number of pages8
JournalFerroelectrics
Volume466
Issue number1
DOIs
StatusPublished - 4 Jul 2014

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hydrostatics
Single crystals
Polarization
composite materials
single crystals
Composite materials
polarization
figure of merit
Crystal orientation
Polymers
Anisotropy
anisotropy
polymers
Crystal symmetry
symmetry
Perovskite
Ferroelectric materials
elastic properties
coefficients
cells

Cite this

Polarisation orientation effects and hydrostatic parameters in novel 2-2 composites basedon PMN-x PT single crystals. / Bowen, C.R.; Topolov, V.Yu.

In: Ferroelectrics, Vol. 466, No. 1, 04.07.2014, p. 21-28.

Research output: Contribution to journalArticle

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