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 Production of Sr-deficient bismuth tantalates from microwave–hydrothermal derived precursors : structural and dielectric propertiesChemical synthesisDielectric propertiesCeramicsStrontium 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.2012-07-02T19:11:23Z2012-07-02T19:11:23Z2007info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfDIAS, 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/123456789/929O 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/openAccessDias, AndersonMoreira, Roberto Luizengreponame:Repositório Institucional da UFOPinstname:Universidade Federal de Ouro Preto (UFOP)instacron:UFOP2019-02-25T14:51:43Zoai:repositorio.ufop.br: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.none.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.none.fl_str_mv 2007
2012-07-02T19:11:23Z
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
format article
status_str publishedVersion
dc.identifier.uri.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.
00223697
http://www.repositorio.ufop.br/handle/123456789/929
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
url http://www.repositorio.ufop.br/handle/123456789/929
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:Repositório Institucional da UFOP
instname:Universidade Federal de Ouro Preto (UFOP)
instacron:UFOP
instname_str Universidade Federal de Ouro Preto (UFOP)
instacron_str UFOP
institution UFOP
reponame_str Repositório Institucional da UFOP
collection Repositório Institucional da UFOP
repository.name.fl_str_mv Repositório Institucional da UFOP - Universidade Federal de Ouro Preto (UFOP)
repository.mail.fl_str_mv repositorio@ufop.edu.br
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