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Jo, Wook
Sustainable Functional Ceramics Lab
Research Interests
  • Lead-free piezoceramics, ultra - low temperature sintering, ferroelectrics, relaxor ferroelectrics, 2D materials, magnetoelectric materials, multiferroics

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

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Title
Tailoring of unipolar strain in lead-free piezoelectrics using the ceramic/ceramic composite approach
Author
Khansur, Neamul H.Groh, ClaudiaJo, WookReinhard, ChristinaKimpton, Justin A.Webber, Kyle G.Daniels, John E.
Keywords
FREE ELECTROMECHANICAL CERAMICS; FREE PIEZOCERAMICS; GIANT STRAIN; SYSTEM; FERROELECTRICS; PERSPECTIVE; BEHAVIOR; NIOBATE
Issue Date
2014-03
Publisher
AMER INST PHYSICS
Citation
JOURNAL OF APPLIED PHYSICS, v.115, no.12, pp. -
Abstract
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.
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DOI
10.1063/1.4869786
ISSN
0021-8979
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