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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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Effect of poling temperature on piezoelectricity of CaZrO3-modified (K, Na)NbO3-based lead-free ceramics

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dc.contributor.author Yao, Fang-Zhou ko
dc.contributor.author Wang, Ke ko
dc.contributor.author Jo, Wook ko
dc.contributor.author Lee, Jae-Shin ko
dc.contributor.author Li, Jing-Feng ko
dc.date.available 2014-10-10T01:56:44Z -
dc.date.created 2014-10-08 ko
dc.date.issued 2014-09 ko
dc.identifier.citation JOURNAL OF APPLIED PHYSICS, v.116, no.11, pp.114102 ko
dc.identifier.issn 0021-8979 ko
dc.identifier.uri https://scholarworks.unist.ac.kr/handle/201301/7021 -
dc.description.abstract Electrical poling is indispensable for endowing isotropic ferroelectric polycrystals with a net macroscopic polarization and hence piezoelectricity. However, little attention has been paid to the optimization of poling conditions in (K, Na)NbO3-based ceramics with a polymorphic phase transition. This study investigated the electrical properties of CaZrO3-modified (K, Na, Li)(Nb, Ta)O3lead-free piezoceramics as a function of the poling temperature. Peak piezoelectric coefficient d33of 352 ± 7 pC/N and planar electromechanical coupling factor kpof 0.47 were obtained at the optimized poling temperature of 120°C, which crosses the polymorphic phase transition regime. In-depth analysis of the asymmetric polarization hysteresis loops and bipolar strain curves uncovered striking analogy between electrical poling and unipolar cycling in the current system, which is attributed to a competition between domain reorientation and space charge accumulation. ko
dc.description.statementofresponsibility open -
dc.language 영어 ko
dc.publisher AMER INST PHYSICS ko
dc.title Effect of poling temperature on piezoelectricity of CaZrO3-modified (K, Na)NbO3-based lead-free ceramics ko
dc.type ARTICLE ko
dc.identifier.scopusid 2-s2.0-84907185171 ko
dc.identifier.wosid 000342837000038 ko
dc.type.rims ART ko
dc.description.wostc 1 *
dc.description.scopustc 0 *
dc.date.tcdate 2015-05-06 *
dc.date.scptcdate 2014-10-08 *
dc.identifier.doi 10.1063/1.4895774 ko
dc.identifier.url http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=84907185171 ko
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