Production of Sr-deficient bismuth tantalates from microwave–hydrothermal derived precursors : structural and dielectric properties

Detalhes bibliográficos
Autor(a) principal: Dias, Anderson
Data de Publicação: 2007
Outros Autores: Moreira, Roberto Luiz
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFOP
Texto Completo: http://www.repositorio.ufop.br/handle/123456789/929
Resumo: Strontium bismuth tantalates were produced for the first time from microwave–hydrothermal precursors at 200 _C, for 2 h. Structural and dielectric properties were investigated by X-ray diffraction and complex impedance spectroscopy. A high ferroelectric–paraelectric transition temperature of 375 _C ðTcÞ was observed, together with two different dielectric regimes for the ac electrical conductivity below Tc. The activation energies were calculated as 0.155 and 0.531 eV, and are related to conduction by oxygen vacancies. It was concluded that the low activation energies showed by these materials could contribute to their fatigue-free nature.
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spelling Dias, AndersonMoreira, Roberto Luiz2012-07-02T19:11:23Z2012-07-02T19:11:23Z2007DIAS, A.; MOREIRA, R. L. Production of Sr-deficient bismuth tantalates from microwave–hydrothermal derived precursors : structural and dielectric properties. Journal of Physics and Chemistry of Solids, v. 68, n.4, p.645-649, 2007. Disponível em: <http://www.sciencedirect.com/science/article/pii/S0022369707000844>. Acesso em: 02 jul. 2012.00223697http://www.repositorio.ufop.br/handle/123456789/929Strontium bismuth tantalates were produced for the first time from microwave–hydrothermal precursors at 200 _C, for 2 h. Structural and dielectric properties were investigated by X-ray diffraction and complex impedance spectroscopy. A high ferroelectric–paraelectric transition temperature of 375 _C ðTcÞ was observed, together with two different dielectric regimes for the ac electrical conductivity below Tc. The activation energies were calculated as 0.155 and 0.531 eV, and are related to conduction by oxygen vacancies. It was concluded that the low activation energies showed by these materials could contribute to their fatigue-free nature.Chemical synthesisDielectric propertiesCeramicsProduction of Sr-deficient bismuth tantalates from microwave–hydrothermal derived precursors : structural and dielectric propertiesinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleO Periódico Journal of Physics and Chemistry of Solids concede permissão para depósito deste artigo no Repositório Institucional da UFOP. Número da licença: 3333160646333info:eu-repo/semantics/openAccessengreponame:Repositório Institucional da UFOPinstname:Universidade Federal de Ouro Preto (UFOP)instacron:UFOPCC-LICENSElicense_urllicense_urltext/plain; charset=utf-843http://www.repositorio.ufop.br/bitstream/123456789/929/2/license_url5134edb0a80711cbbaa5247c36025151MD52ORIGINALARTIGO_ProductionSrDeficient.pdfARTIGO_ProductionSrDeficient.pdfapplication/pdf401909http://www.repositorio.ufop.br/bitstream/123456789/929/1/ARTIGO_ProductionSrDeficient.pdf1666dd3af65254e9927ee6a9466d0f5aMD51123456789/9292019-02-25 09:51:43.232oai:localhost:123456789/929Repositório InstitucionalPUBhttp://www.repositorio.ufop.br/oai/requestrepositorio@ufop.edu.bropendoar:32332019-02-25T14:51:43Repositório Institucional da UFOP - Universidade Federal de Ouro Preto (UFOP)false
dc.title.pt_BR.fl_str_mv Production of Sr-deficient bismuth tantalates from microwave–hydrothermal derived precursors : structural and dielectric properties
title Production of Sr-deficient bismuth tantalates from microwave–hydrothermal derived precursors : structural and dielectric properties
spellingShingle Production of Sr-deficient bismuth tantalates from microwave–hydrothermal derived precursors : structural and dielectric properties
Dias, Anderson
Chemical synthesis
Dielectric properties
Ceramics
title_short Production of Sr-deficient bismuth tantalates from microwave–hydrothermal derived precursors : structural and dielectric properties
title_full Production of Sr-deficient bismuth tantalates from microwave–hydrothermal derived precursors : structural and dielectric properties
title_fullStr Production of Sr-deficient bismuth tantalates from microwave–hydrothermal derived precursors : structural and dielectric properties
title_full_unstemmed Production of Sr-deficient bismuth tantalates from microwave–hydrothermal derived precursors : structural and dielectric properties
title_sort Production of Sr-deficient bismuth tantalates from microwave–hydrothermal derived precursors : structural and dielectric properties
author Dias, Anderson
author_facet Dias, Anderson
Moreira, Roberto Luiz
author_role author
author2 Moreira, Roberto Luiz
author2_role author
dc.contributor.author.fl_str_mv Dias, Anderson
Moreira, Roberto Luiz
dc.subject.por.fl_str_mv Chemical synthesis
Dielectric properties
Ceramics
topic Chemical synthesis
Dielectric properties
Ceramics
description Strontium bismuth tantalates were produced for the first time from microwave–hydrothermal precursors at 200 _C, for 2 h. Structural and dielectric properties were investigated by X-ray diffraction and complex impedance spectroscopy. A high ferroelectric–paraelectric transition temperature of 375 _C ðTcÞ was observed, together with two different dielectric regimes for the ac electrical conductivity below Tc. The activation energies were calculated as 0.155 and 0.531 eV, and are related to conduction by oxygen vacancies. It was concluded that the low activation energies showed by these materials could contribute to their fatigue-free nature.
publishDate 2007
dc.date.issued.fl_str_mv 2007
dc.date.accessioned.fl_str_mv 2012-07-02T19:11:23Z
dc.date.available.fl_str_mv 2012-07-02T19:11:23Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
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status_str publishedVersion
dc.identifier.citation.fl_str_mv DIAS, A.; MOREIRA, R. L. Production of Sr-deficient bismuth tantalates from microwave–hydrothermal derived precursors : structural and dielectric properties. Journal of Physics and Chemistry of Solids, v. 68, n.4, p.645-649, 2007. Disponível em: <http://www.sciencedirect.com/science/article/pii/S0022369707000844>. Acesso em: 02 jul. 2012.
dc.identifier.uri.fl_str_mv http://www.repositorio.ufop.br/handle/123456789/929
dc.identifier.issn.none.fl_str_mv 00223697
identifier_str_mv DIAS, A.; MOREIRA, R. L. Production of Sr-deficient bismuth tantalates from microwave–hydrothermal derived precursors : structural and dielectric properties. Journal of Physics and Chemistry of Solids, v. 68, n.4, p.645-649, 2007. Disponível em: <http://www.sciencedirect.com/science/article/pii/S0022369707000844>. Acesso em: 02 jul. 2012.
00223697
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