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Response of intergrown microstructure to an electric field and its consequences in the lead-free piezoelectric bismuth sodium titanate

Liu, Yun; Noren, Lasse; Studer, Andrew J; Withers, Raymond; Guo, Yiping; Li, Yongxiang; Yang, Hiu; Wang, Jian

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We investigate the R3c average structure and micro-structure of the ceramic Bi 0.5Na 0.5TiO 3 (BNT) in situ under applied electric fields using diffraction techniques. Electron diffraction implies the presence of significant octahedral tilt twin disorder, corresponding to the existence of a fine scale intergrown microstructural (IGMS) 'phase' within the R3c rhombohedral average structure matrix. A careful neutron refinement suggests not only that the off-centre displacements of the cations...[Show more]

dc.contributor.authorLiu, Yun
dc.contributor.authorNoren, Lasse
dc.contributor.authorStuder, Andrew J
dc.contributor.authorWithers, Raymond
dc.contributor.authorGuo, Yiping
dc.contributor.authorLi, Yongxiang
dc.contributor.authorYang, Hiu
dc.contributor.authorWang, Jian
dc.date.accessioned2015-12-07T22:17:16Z
dc.identifier.issn0022-4596
dc.identifier.urihttp://hdl.handle.net/1885/18458
dc.description.abstractWe investigate the R3c average structure and micro-structure of the ceramic Bi 0.5Na 0.5TiO 3 (BNT) in situ under applied electric fields using diffraction techniques. Electron diffraction implies the presence of significant octahedral tilt twin disorder, corresponding to the existence of a fine scale intergrown microstructural (IGMS) 'phase' within the R3c rhombohedral average structure matrix. A careful neutron refinement suggests not only that the off-centre displacements of the cations relative to the oxygens in the R3c regions increases systematically on application of an electric field but also that the phase fraction of the IGMS regions increases systematically. The latter change in phase fraction on application of the electric field enhances the polar displacement of the cations relative to the oxygen anions and affects the overall strain response. These IGMS regions form local polar nano regions that are not correlated with one another, resulting in polarisation relaxation and strain behaviour observed in BNT-containing materials.
dc.publisherAcademic Press
dc.sourceJournal of Solid State Chemistry
dc.subjectKeywords: Applied electric field; Average structure; Bismuth sodium titanate; Diffraction techniques; In-phase; In-situ; Lead-free piezoelectrics; Micro-structural; Oxygen anion; Phase fractions; Strain response; TiO; Bismuth; Electron diffraction; Microstructure; Bismuth sodium titanate; Electron diffraction; Intergrown microstructure; Neutron diffraction
dc.titleResponse of intergrown microstructure to an electric field and its consequences in the lead-free piezoelectric bismuth sodium titanate
dc.typeJournal article
local.description.notesImported from ARIES
local.identifier.citationvolume187
dc.date.issued2012
local.identifier.absfor030206 - Solid State Chemistry
local.identifier.ariespublicationu5072968xPUB4
local.type.statusPublished Version
local.contributor.affiliationLiu, Yun, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationNoren, Lasse, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationStuder, Andrew J, Australian Nuclear Science and Technology Organisation
local.contributor.affiliationWithers, Raymond, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationGuo, Yiping, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationLi, Yongxiang, Shanghai Institute of Ceramics
local.contributor.affiliationYang, Hiu, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationWang, Jian, College of Physical and Mathematical Sciences, ANU
local.description.embargo2037-12-31
local.bibliographicCitation.startpage309
local.bibliographicCitation.lastpage315
local.identifier.doi10.1016/j.jssc.2012.01.027
local.identifier.absseo970103 - Expanding Knowledge in the Chemical Sciences
dc.date.updated2016-02-24T11:34:07Z
local.identifier.scopusID2-s2.0-84862785141
local.identifier.thomsonID000301011800048
CollectionsANU Research Publications

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