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Title: Tailoring of unipolar strain in lead-free piezoelectrics using the ceramic/ceramic composite approach

The electric-field-induced strain response mechanism in a polycrystalline ceramic/ceramic composite of relaxor and ferroelectric materials has been studied using in situ high-energy x-ray diffraction. The addition of ferroelectric phase material in the relaxor matrix has produced a system where a small volume fraction behaves independently of the bulk under an applied electric field. Inter- and intra-grain models of the strain mechanism in the composite material consistent with the diffraction data have been proposed. The results show that such ceramic/ceramic composite microstructure has the potential for tailoring properties of future piezoelectric materials over a wider range than is possible in uniform compositions.
Authors:
;  [1] ; ; ;  [2] ;  [3] ;  [4]
  1. School of Materials Science and Engineering, University of New South Wales, NSW 2052 (Australia)
  2. Institute of Materials Science, Technische Universität Darmstadt, Alarich-Weiss-Straße 2, 64287 Darmstadt (Germany)
  3. Diamond Light Source, Beamline I12 JEEP, Didcot, Oxfordshire OX11 0DE (United Kingdom)
  4. The Australian Synchrotron, Clayton, Victoria 3168 (Australia)
Publication Date:
OSTI Identifier:
22271139
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 115; Journal Issue: 12; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; CERAMICS; COMPOSITE MATERIALS; ELECTRIC FIELDS; FERROELECTRIC MATERIALS; MATRIX MATERIALS; MICROSTRUCTURE; PIEZOELECTRICITY; POLYCRYSTALS; STRAINS; X-RAY DIFFRACTION