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Jo, Wook
Sustainable Functional Ceramics Lab.
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dc.citation.endPage 4086 -
dc.citation.number 33 -
dc.citation.startPage 4079 -
dc.citation.title ADVANCED FUNCTIONAL MATERIALS -
dc.citation.volume 23 -
dc.contributor.author Yao, Fang-Zhou -
dc.contributor.author Jo, Wook -
dc.contributor.author Gobeljic, Danka -
dc.contributor.author Shvartsman, Vladimir V. -
dc.contributor.author Lupascu, Doru C. -
dc.contributor.author Li, Jing-Feng -
dc.contributor.author Roedel, Juergen -
dc.date.accessioned 2023-12-22T03:37:44Z -
dc.date.available 2023-12-22T03:37:44Z -
dc.date.created 2014-10-21 -
dc.date.issued 2013-09 -
dc.description.abstract The development of lead-free piezoceramics has attracted great interest because of growing environmental concerns. A polymorphic phase transition (PPT) has been utilized in the past to tailor piezoelectric properties in lead-free (K,Na)NbO3 (KNN)-based materials accepting the drawback of large temperature sensitivity. Here a material concept is reported, which yields an average piezoelectric coefficientd(33) of about 300 pC/N and a high level of unipolar strain up to 0.16% at room temperature. Most intriguingly, field-induced strain varies less than 10% from room temperature to 175 degrees C. The temperature insensitivity of field-induced strain is rationalized using an electrostrictive coupling to polarization amplitude while the temperature-dependent piezoelectric coefficient is discussed using localized piezoresponse probed by piezoforce microscopy. This discovery opens a new development window for temperature-insensitive piezoelectric actuators despite the presence of a polymorphic phase transition around room temperature. -
dc.identifier.bibliographicCitation ADVANCED FUNCTIONAL MATERIALS, v.23, no.33, pp.4079 - 4086 -
dc.identifier.doi 10.1002/adfm.201203754 -
dc.identifier.issn 1616-301X -
dc.identifier.scopusid 2-s2.0-84883590808 -
dc.identifier.uri https://scholarworks.unist.ac.kr/handle/201301/7521 -
dc.identifier.url http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=84883590808 -
dc.identifier.wosid 000327492300004 -
dc.language 영어 -
dc.publisher WILEY-V C H VERLAG GMBH -
dc.title Temperature-insensitive (K,Na)NbO3-based lead-free piezoactuator ceramics -
dc.type Article -
dc.description.journalRegisteredClass scie -
dc.description.journalRegisteredClass scopus -

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