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dc.contributor.authorLv, Xiang
dc.contributor.authorWu, Jiagang
dc.contributor.authorZhu, Jianguo
dc.contributor.authorXiao, Dingquan
dc.contributor.authorZhang, Xixiang
dc.date.accessioned2017-08-21T06:28:03Z
dc.date.available2017-08-21T06:28:03Z
dc.date.issued2017-08-18
dc.identifier.citationLv X, Wu J, Zhu J, Xiao D, Zhangb X (2017) A New Method to Improve the Electrical Properties of KNN-based Ceramics: Tailoring Phase Fraction. Journal of the European Ceramic Society. Available: http://dx.doi.org/10.1016/j.jeurceramsoc.2017.08.016.
dc.identifier.issn0955-2219
dc.identifier.doi10.1016/j.jeurceramsoc.2017.08.016
dc.identifier.urihttp://hdl.handle.net/10754/625357
dc.description.abstractAlthough both the phase type and fraction of multi-phase coexistence can affect the electrical properties of (K,Na)NbO3 (KNN)-based ceramics, effects of phase fraction on their electrical properties were few concerned. In this work, through changing the calcination temperature of CaZrO3 powders, we successfully developed the 0.96K0.5Na0.5Nb0.96Sb0.04O3-0.01CaZrO3-0.03Bi0.5Na0.5HfO3 ceramics containing a wide rhombohedral-tetragonal (R-T) phase coexistence with the variations of T (or R) phase fractions. It was found that higher T phase fraction can warrant a larger piezoelectric constant (d33) and d33 also showed a linear variation with respect to tetragonality ratio (c/a). More importantly, a number of domain patterns were observed due to high T phase fraction and large c/a ratio, greatly benefiting the piezoelectricity. In addition, the improved ferroelectric fatigue behavior and thermal stability were also shown in the ceramics containing high T phase fraction. Therefore, this work can bring a new viewpoint into the physical mechanism of KNN-based ceramics behind R-T phase coexistence.
dc.description.sponsorshipAuthors gratefully acknowledge the supports of the National Science Foundation of China (NSFC Nos., 51332003 and 51272164) and King Abdullah University of Science and Technology. We thank Mrs. Wang Hui for measuring FE-SEM images.
dc.publisherElsevier BV
dc.relation.urlhttp://www.sciencedirect.com/science/article/pii/S0955221917305551
dc.rightsNOTICE: this is the author’s version of a work that was accepted for publication in Journal of the European Ceramic Society. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Journal of the European Ceramic Society, [, , (2017-08-18)] DOI: 10.1016/j.jeurceramsoc.2017.08.016 . © 2017. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subjectLead-free piezoceramics
dc.subjectMultiphase coexistence
dc.subjectPhase fraction
dc.subjectElectrical properties
dc.titleA New Method to Improve the Electrical Properties of KNN-based Ceramics: Tailoring Phase Fraction
dc.typeArticle
dc.contributor.departmentMaterial Science and Engineering Program
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.identifier.journalJournal of the European Ceramic Society
dc.eprint.versionPost-print
dc.contributor.institutionDepartment of Materials Science, Sichuan University, Chengdu 610064, China
kaust.personLv, Xiang
kaust.personZhang, Xixiang
refterms.dateFOA2019-08-18T00:00:00Z
dc.date.published-online2017-08-18
dc.date.published-print2018-01


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