Grain boundary Fe-doping effects in LSGM

Detalhes bibliográficos
Autor(a) principal: Gomes, Eduarda
Data de Publicação: 2008
Outros Autores: Figueiredo, F. M., Marques, F. M. B.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/20.500.11960/3049
Resumo: The electrical properties of La0.95Sr0.05Ga0.90Mg0.10O3 − δ (LSGM) were modified by selective doping of the grain boundaries, using LaFeO3 screen-printed layers and annealing at high temperature to promote Fe diffusion into LSGM. Scanning electron microscopy (SEM) and energydispersive spectroscopy (EDS) analyses showed that iron was mainly located along the grain boundaries with the bulk grain composition almost unchanged. Impedance spectra showed a significant increase in the total conductivity for the Fe-doped samples, the effect being greater for the grain boundary contribution. The formation of a parallel pathway for electronic conduction along the grain boundaries explains these effects. Ageing of these samples at high temperature, after removal of the Fe source, showed a steady shift to the original LSGM behaviour, due to dilution of Fe throughout the samples.
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spelling Grain boundary Fe-doping effects in LSGMLanthanum gallateGrain boundaryMixed conductorImpedance spectroscopyThe electrical properties of La0.95Sr0.05Ga0.90Mg0.10O3 − δ (LSGM) were modified by selective doping of the grain boundaries, using LaFeO3 screen-printed layers and annealing at high temperature to promote Fe diffusion into LSGM. Scanning electron microscopy (SEM) and energydispersive spectroscopy (EDS) analyses showed that iron was mainly located along the grain boundaries with the bulk grain composition almost unchanged. Impedance spectra showed a significant increase in the total conductivity for the Fe-doped samples, the effect being greater for the grain boundary contribution. The formation of a parallel pathway for electronic conduction along the grain boundaries explains these effects. Ageing of these samples at high temperature, after removal of the Fe source, showed a steady shift to the original LSGM behaviour, due to dilution of Fe throughout the samples.2022-12-29T15:18:24Z2008-01-01T00:00:00Z20082022-12-05T11:31:46Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/20.500.11960/3049eng0167-273810.1016/j.ssi.2008.01.057Gomes, EduardaFigueiredo, F. M.Marques, F. M. B.info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-03-21T14:42:53Zoai:repositorio.ipvc.pt:20.500.11960/3049Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T17:44:30.448363Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Grain boundary Fe-doping effects in LSGM
title Grain boundary Fe-doping effects in LSGM
spellingShingle Grain boundary Fe-doping effects in LSGM
Gomes, Eduarda
Lanthanum gallate
Grain boundary
Mixed conductor
Impedance spectroscopy
title_short Grain boundary Fe-doping effects in LSGM
title_full Grain boundary Fe-doping effects in LSGM
title_fullStr Grain boundary Fe-doping effects in LSGM
title_full_unstemmed Grain boundary Fe-doping effects in LSGM
title_sort Grain boundary Fe-doping effects in LSGM
author Gomes, Eduarda
author_facet Gomes, Eduarda
Figueiredo, F. M.
Marques, F. M. B.
author_role author
author2 Figueiredo, F. M.
Marques, F. M. B.
author2_role author
author
dc.contributor.author.fl_str_mv Gomes, Eduarda
Figueiredo, F. M.
Marques, F. M. B.
dc.subject.por.fl_str_mv Lanthanum gallate
Grain boundary
Mixed conductor
Impedance spectroscopy
topic Lanthanum gallate
Grain boundary
Mixed conductor
Impedance spectroscopy
description The electrical properties of La0.95Sr0.05Ga0.90Mg0.10O3 − δ (LSGM) were modified by selective doping of the grain boundaries, using LaFeO3 screen-printed layers and annealing at high temperature to promote Fe diffusion into LSGM. Scanning electron microscopy (SEM) and energydispersive spectroscopy (EDS) analyses showed that iron was mainly located along the grain boundaries with the bulk grain composition almost unchanged. Impedance spectra showed a significant increase in the total conductivity for the Fe-doped samples, the effect being greater for the grain boundary contribution. The formation of a parallel pathway for electronic conduction along the grain boundaries explains these effects. Ageing of these samples at high temperature, after removal of the Fe source, showed a steady shift to the original LSGM behaviour, due to dilution of Fe throughout the samples.
publishDate 2008
dc.date.none.fl_str_mv 2008-01-01T00:00:00Z
2008
2022-12-29T15:18:24Z
2022-12-05T11:31:46Z
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://hdl.handle.net/20.500.11960/3049
url http://hdl.handle.net/20.500.11960/3049
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 0167-2738
10.1016/j.ssi.2008.01.057
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 Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
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collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository.name.fl_str_mv Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
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