Microstructural Features and Functional Properties of Bilayered BaTiO3/BaTi1-xZrxO3 Ceramics

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dc.contributor.authorAmaral, Thiago Martins
dc.contributor.authorAntonelli, Eduardo [UNIFESP]
dc.contributor.authorAlejandro Ochoa, Diego
dc.contributor.authorEduardo Garcia, Jose
dc.contributor.authorHernandes, Antonio Carlos
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.contributor.institutionUniv Politecn Cataluna
dc.contributor.institutionUniversidade Federal de São Paulo (UNIFESP)
dc.date.accessioned2016-01-24T14:40:22Z
dc.date.available2016-01-24T14:40:22Z
dc.date.issued2015-04-01
dc.description.abstractValidity of mixture rule for dielectrics in series configuration and the correlation between microstructure and electrical properties in bilayered BaTiO3/BaTi1-xZrxO3 ceramics were studied. Samples were obtained from BaTi1-xZrxO3 (BTZx) nanopowder synthesized by the polymeric precursor technique and had their microstructure, dielectric, piezoelectric, and ferroelectric properties investigated. These bilayered ceramics' properties were compared to the properties of homogeneous BTZx samples. And, also, the formers' electrical permittivities were compared with the predictions of the simple mixture rule. According to the results, the microstructures of the layers do not differ from the microstructure of the corresponding homogeneous BTZx ceramic. and pyroelectric coefficient measurements show that the electrical properties of the interface do not contribute to the functional properties of the bilayered samples. Nevertheless, on increasing Zr4+, the agreement between the experimental and the predicted permittivity of the bilayered ceramics is gradually reduced, mainly at temperatures where the permittivity is governed by the response of the layer containing Zr4+. As a mechanical joint between the layers, the interface induces stresses during sintering due to thermal mismatch between compositions, thereby affecting the bilayers' electrical properties. Our results show that interface's mechanical effects compromise the functional properties of layered ferroelectric ceramics.en
dc.description.affiliationUniv São Paulo, Phys Inst Sao Carlos, Grp Crescimento Cristais & Mat Ceram, BR-13560970 São Paulo, Brazil
dc.description.affiliationUniv Politecn Cataluna, BarcelonaTech, Dept Appl Phys, ES-08034 Barcelona, Spain
dc.description.affiliationUniversidade Federal de São Paulo, Inst Sci & Technol, UNIFESP, São Paulo, Brazil
dc.description.affiliationUnifespUniversidade Federal de São Paulo, Inst Sci & Technol, UNIFESP, São Paulo, Brazil
dc.description.sourceWeb of Science
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.sponsorshipSpanish Government
dc.description.sponsorshipIDSpanish Government: MAT2013-48009-C4-2-P
dc.format.extent1169-1174
dc.identifierhttp://dx.doi.org/10.1111/jace.13417
dc.identifier.citationJournal of the American Ceramic Society. Hoboken: Wiley-Blackwell, v. 98, n. 4, p. 1169-1174, 2015.
dc.identifier.doi10.1111/jace.13417
dc.identifier.issn0002-7820
dc.identifier.urihttp://repositorio.unifesp.br/handle/11600/38976
dc.identifier.wosWOS:000352635100022
dc.language.isoeng
dc.publisherWiley-Blackwell
dc.relation.ispartofJournal of the American Ceramic Society
dc.rightsinfo:eu-repo/semantics/restrictedAccess
dc.rights.licensehttp://olabout.wiley.com/WileyCDA/Section/id-406071.html
dc.titleMicrostructural Features and Functional Properties of Bilayered BaTiO3/BaTi1-xZrxO3 Ceramicsen
dc.typeinfo:eu-repo/semantics/article
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