Suppression of ferroelectric phase-transition in niobates via solid solution formation
Autor(a) principal: | |
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Data de Publicação: | 2019 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1016/j.matlet.2019.07.032 http://hdl.handle.net/11449/189396 |
Resumo: | Suppression of the phase-transition type ferro-paraelectric from doping of KSr2Nb5O15 host-structure was investigated by set of techniques X-ray diffraction, Mössbauer spectroscopy and Dielectric spectroscopy at high temperature. High crystalline and single phase iron-doped niobate ceramic with Tetragonal Tungsten Bronze TTB-type structure, stoichiometry KSr2(FeNb4)O15-δ, was prepared by conventional technique using high energy milling. Both techniques Rietveld Method and Mössbauer spectroscopy showed that Fe3+ cations occupy two different octahedral sites in the TTB structure on the niobium octahedral sites, termed as Nb(1) and Nb(2). At room temperature, the dielectric permittivity value of the KSr2(FeNb4)O15-δ is two times higher than the permittivity values of the KSr2Nb5O15. The suppression with extinction of ferro-para phase-transition occurs as function of break-down of polar characteristic. New non-polar space group development stemming from solid solution formation is discussed. |
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Suppression of ferroelectric phase-transition in niobates via solid solution formationDielectric spectroscopyMössbauer spectroscopyNiobatePhase-transition suppressionSuppression of the phase-transition type ferro-paraelectric from doping of KSr2Nb5O15 host-structure was investigated by set of techniques X-ray diffraction, Mössbauer spectroscopy and Dielectric spectroscopy at high temperature. High crystalline and single phase iron-doped niobate ceramic with Tetragonal Tungsten Bronze TTB-type structure, stoichiometry KSr2(FeNb4)O15-δ, was prepared by conventional technique using high energy milling. Both techniques Rietveld Method and Mössbauer spectroscopy showed that Fe3+ cations occupy two different octahedral sites in the TTB structure on the niobium octahedral sites, termed as Nb(1) and Nb(2). At room temperature, the dielectric permittivity value of the KSr2(FeNb4)O15-δ is two times higher than the permittivity values of the KSr2Nb5O15. The suppression with extinction of ferro-para phase-transition occurs as function of break-down of polar characteristic. New non-polar space group development stemming from solid solution formation is discussed.Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Department of Chemistry and Biochemistry São Paulo State University (Unesp) School of Technology and Sciences, R. Roberto Simonsen – 305, CEP: 19060-900Department of Physics São Paulo State University (Unesp) School of Technology and Sciences, R. Roberto Simonsen – 305, CEP: 19060-900Department of Physics Universidade Estadual de Maringá, Av. Colombo, 5790 Zona 7, CEP: 87020-900Department of Chemistry and Biochemistry São Paulo State University (Unesp) School of Technology and Sciences, R. Roberto Simonsen – 305, CEP: 19060-900Department of Physics São Paulo State University (Unesp) School of Technology and Sciences, R. Roberto Simonsen – 305, CEP: 19060-900FAPESP: 2007/03510-9FAPESP: 2014/11189-0FAPESP: 2019/06623-6Universidade Estadual Paulista (Unesp)Universidade Estadual de Maringá (UEM)Lanfredi, S. [UNESP]Praxedes, F. R. [UNESP]Ivashita, F. F.Paesano, A.Nobre, M. A.L. [UNESP]2019-10-06T16:39:18Z2019-10-06T16:39:18Z2019-11-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article85-88http://dx.doi.org/10.1016/j.matlet.2019.07.032Materials Letters, v. 254, p. 85-88.1873-49790167-577Xhttp://hdl.handle.net/11449/18939610.1016/j.matlet.2019.07.0322-s2.0-85068873325Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengMaterials Lettersinfo:eu-repo/semantics/openAccess2024-06-18T18:17:57Zoai:repositorio.unesp.br:11449/189396Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T16:46:44.675659Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Suppression of ferroelectric phase-transition in niobates via solid solution formation |
title |
Suppression of ferroelectric phase-transition in niobates via solid solution formation |
spellingShingle |
Suppression of ferroelectric phase-transition in niobates via solid solution formation Lanfredi, S. [UNESP] Dielectric spectroscopy Mössbauer spectroscopy Niobate Phase-transition suppression |
title_short |
Suppression of ferroelectric phase-transition in niobates via solid solution formation |
title_full |
Suppression of ferroelectric phase-transition in niobates via solid solution formation |
title_fullStr |
Suppression of ferroelectric phase-transition in niobates via solid solution formation |
title_full_unstemmed |
Suppression of ferroelectric phase-transition in niobates via solid solution formation |
title_sort |
Suppression of ferroelectric phase-transition in niobates via solid solution formation |
author |
Lanfredi, S. [UNESP] |
author_facet |
Lanfredi, S. [UNESP] Praxedes, F. R. [UNESP] Ivashita, F. F. Paesano, A. Nobre, M. A.L. [UNESP] |
author_role |
author |
author2 |
Praxedes, F. R. [UNESP] Ivashita, F. F. Paesano, A. Nobre, M. A.L. [UNESP] |
author2_role |
author author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) Universidade Estadual de Maringá (UEM) |
dc.contributor.author.fl_str_mv |
Lanfredi, S. [UNESP] Praxedes, F. R. [UNESP] Ivashita, F. F. Paesano, A. Nobre, M. A.L. [UNESP] |
dc.subject.por.fl_str_mv |
Dielectric spectroscopy Mössbauer spectroscopy Niobate Phase-transition suppression |
topic |
Dielectric spectroscopy Mössbauer spectroscopy Niobate Phase-transition suppression |
description |
Suppression of the phase-transition type ferro-paraelectric from doping of KSr2Nb5O15 host-structure was investigated by set of techniques X-ray diffraction, Mössbauer spectroscopy and Dielectric spectroscopy at high temperature. High crystalline and single phase iron-doped niobate ceramic with Tetragonal Tungsten Bronze TTB-type structure, stoichiometry KSr2(FeNb4)O15-δ, was prepared by conventional technique using high energy milling. Both techniques Rietveld Method and Mössbauer spectroscopy showed that Fe3+ cations occupy two different octahedral sites in the TTB structure on the niobium octahedral sites, termed as Nb(1) and Nb(2). At room temperature, the dielectric permittivity value of the KSr2(FeNb4)O15-δ is two times higher than the permittivity values of the KSr2Nb5O15. The suppression with extinction of ferro-para phase-transition occurs as function of break-down of polar characteristic. New non-polar space group development stemming from solid solution formation is discussed. |
publishDate |
2019 |
dc.date.none.fl_str_mv |
2019-10-06T16:39:18Z 2019-10-06T16:39:18Z 2019-11-01 |
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 |
http://dx.doi.org/10.1016/j.matlet.2019.07.032 Materials Letters, v. 254, p. 85-88. 1873-4979 0167-577X http://hdl.handle.net/11449/189396 10.1016/j.matlet.2019.07.032 2-s2.0-85068873325 |
url |
http://dx.doi.org/10.1016/j.matlet.2019.07.032 http://hdl.handle.net/11449/189396 |
identifier_str_mv |
Materials Letters, v. 254, p. 85-88. 1873-4979 0167-577X 10.1016/j.matlet.2019.07.032 2-s2.0-85068873325 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Materials Letters |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
85-88 |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1808128699479883776 |