Structural and dielectric properties of relaxor Sr0.5Ba0.5Bi2Nb2O9 ceramic

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dc.contributor.authorBehera, B. [UNESP]
dc.contributor.authorAraujo, E. B. [UNESP]
dc.contributor.authorJunior, A. F.
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversidade Federal de Goiás (UFG)
dc.date.accessioned2014-05-20T13:29:48Z
dc.date.available2014-05-20T13:29:48Z
dc.date.issued2010-01-01
dc.description.abstractSr0.5Ba0.5Bi2Nb2O9 ceramic was prepared by a conventional solid state reaction method and studied using X-ray powder diffraction and dielectric measurements. At room temperature, an orthorhombic structure was confirmed and their parameters were obtained using the Rietveld method. Dielectric properties were studied in a broad range of temperatures and frequencies. Typical relaxor behaviour was observed with strong dispersion of the complex relative dielectric permittivity. The temperature of the maximum dielectric constant T-m decreases with increasing frequency, and shifts towards higher temperature side. The activation energy E-a approximate to 0.194 +/- 0.003 eV and freezing temperature T-f approximate to 371 +/- 2 K values were found using the Vogel-Fulcher relationship. Conduction process in the material may be due to the hopping of charge carriers at low temperatures and small polarons and/or singly ionised oxygen vacancies at higher temperatures.en
dc.description.affiliationUniv Estadual Paulista, Dept Fis & Quim, BR-15385000 Ilha Solteira, SP, Brazil
dc.description.affiliationUniversidade Federal de Goiás (UFG), Inst Fis, BR-74001970 Goiania, Go, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, Dept Fis & Quim, BR-15385000 Ilha Solteira, SP, Brazil
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.description.sponsorshipIdFAPESP: 07/00183-7
dc.description.sponsorshipIdFAPESP: 07/05302-4
dc.description.sponsorshipIdCNPq: 301382/2006-9
dc.format.extent1-5
dc.identifierhttp://dx.doi.org/10.1179/174367509X12447975734195
dc.identifier.citationAdvances In Applied Ceramics. Leeds: Maney Publishing, v. 109, n. 1, p. 1-5, 2010.
dc.identifier.doi10.1179/174367509X12447975734195
dc.identifier.issn1743-6753
dc.identifier.lattes6725982228402054
dc.identifier.urihttp://hdl.handle.net/11449/10087
dc.identifier.wosWOS:000275304400001
dc.language.isoeng
dc.publisherManey Publishing
dc.relation.ispartofAdvances In Applied Ceramics
dc.relation.ispartofjcr1.092
dc.relation.ispartofsjr0,371
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectBismuth layereden
dc.subjectAurivilliusen
dc.subjectRelaxoren
dc.titleStructural and dielectric properties of relaxor Sr0.5Ba0.5Bi2Nb2O9 ceramicen
dc.typeArtigo
dcterms.licensehttp://maneypublishing.com/index.php/resources/authors/copyright_and_permissions_information_for_authors/
dcterms.rightsHolderManey Publishing
unesp.author.lattes6725982228402054
unesp.campusUniversidade Estadual Paulista (Unesp), Faculdade de Engenharia, Ilha Solteirapt

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Artigos - Física e Química - FEIS