Electronic conductivity in Gd-doped ceria with salt additions

Detalhes bibliográficos
Autor(a) principal: Nascimento, Rubens Maribondo do
Data de Publicação: 2019
Outros Autores: Grilo, João Paulo de Freitas, Macedo, Daniel Araújo de, Marques, Fernando M. B.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFRN
Texto Completo: https://repositorio.ufrn.br/handle/123456789/45493
Resumo: 2030-12
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spelling Nascimento, Rubens Maribondo doGrilo, João Paulo de FreitasMacedo, Daniel Araújo deMarques, Fernando M. B.2021-12-20T18:06:17Z2019-09GRILO, João P. F.; MACEDO, Daniel A.; NASCIMENTO, Rubens M.; MARQUES, Fernando M. B. Electronic conductivity in Gd-doped ceria with salt additions. Electrochimica Acta, [S.L.], v. 318, p. 977-988, set. 2019. Disponível em: https://www.sciencedirect.com/science/article/abs/pii/S0013468619312915?via%3Dihub. Acesso em: 31 mar. 2021. http://dx.doi.org/10.1016/j.electacta.2019.06.148.0013-4686https://repositorio.ufrn.br/handle/123456789/4549310.1016/j.electacta.2019.06.148ElsevierGd-doped ceriaSintering aidsHebb-Wagner polarizationElectronic conductivityImpedance spectroscopyElectronic conductivity in Gd-doped ceria with salt additionsinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article2030-12Samples of Gd-doped ceria (GDC, Ce0.9Gd0.1O1.95) with eutectic mixtures of Na2CO3 and Li2CO3 (NLC), or K2CO3, Na2CO3 and Li2CO3 (KNLC) as sintering aids (5 mol%) were studied against pure GDC and cobalt doped GDC. The former electrolytes reached densifications in excess of 95% when sintered at 1100 C, values comparable to pure GDC sintered at 1500 C, and more than 20% higher than for GDC sintered at 1100 C. X-ray diffraction powder patterns showed only typical GDC peaks without any noticeable lattice modification and microstructural analysis suggested a homogeneous distribution of residual amounts of sintering aids. The electrical properties of all materials were studied by impedance spectroscopy in air from 200 to 750 C. Materials with NLC and KNLC showed a total ionic conductivity matching pure GDC at 600 C. Hebb-Wagner polarization measurements, used to assess the impact of sintering aids on the nand p-type electronic conductivity of GDC (600e750 C) showed that NLC and KNLC additions lower the p-type conductivity of GDC while Co additions have the opposite effect. The efficacy of alkali metal salts to produce ceria-based electrolytes with competitive ionic and electronic transport properties is exposedengreponame:Repositório Institucional da UFRNinstname:Universidade Federal do Rio Grande do Norte (UFRN)instacron:UFRNinfo:eu-repo/semantics/openAccessCC-LICENSElicense_rdflicense_rdfapplication/rdf+xml; charset=utf-8811https://repositorio.ufrn.br/bitstream/123456789/45493/2/license_rdfe39d27027a6cc9cb039ad269a5db8e34MD52LICENSElicense.txtlicense.txttext/plain; charset=utf-81484https://repositorio.ufrn.br/bitstream/123456789/45493/3/license.txte9597aa2854d128fd968be5edc8a28d9MD53123456789/454932024-03-19 01:01:43.83oai:https://repositorio.ufrn.br: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Repositório de PublicaçõesPUBhttp://repositorio.ufrn.br/oai/opendoar:2024-03-19T04:01:43Repositório Institucional da UFRN - Universidade Federal do Rio Grande do Norte (UFRN)false
dc.title.pt_BR.fl_str_mv Electronic conductivity in Gd-doped ceria with salt additions
title Electronic conductivity in Gd-doped ceria with salt additions
spellingShingle Electronic conductivity in Gd-doped ceria with salt additions
Nascimento, Rubens Maribondo do
Gd-doped ceria
Sintering aids
Hebb-Wagner polarization
Electronic conductivity
Impedance spectroscopy
title_short Electronic conductivity in Gd-doped ceria with salt additions
title_full Electronic conductivity in Gd-doped ceria with salt additions
title_fullStr Electronic conductivity in Gd-doped ceria with salt additions
title_full_unstemmed Electronic conductivity in Gd-doped ceria with salt additions
title_sort Electronic conductivity in Gd-doped ceria with salt additions
author Nascimento, Rubens Maribondo do
author_facet Nascimento, Rubens Maribondo do
Grilo, João Paulo de Freitas
Macedo, Daniel Araújo de
Marques, Fernando M. B.
author_role author
author2 Grilo, João Paulo de Freitas
Macedo, Daniel Araújo de
Marques, Fernando M. B.
author2_role author
author
author
dc.contributor.author.fl_str_mv Nascimento, Rubens Maribondo do
Grilo, João Paulo de Freitas
Macedo, Daniel Araújo de
Marques, Fernando M. B.
dc.subject.por.fl_str_mv Gd-doped ceria
Sintering aids
Hebb-Wagner polarization
Electronic conductivity
Impedance spectroscopy
topic Gd-doped ceria
Sintering aids
Hebb-Wagner polarization
Electronic conductivity
Impedance spectroscopy
description 2030-12
publishDate 2019
dc.date.issued.fl_str_mv 2019-09
dc.date.accessioned.fl_str_mv 2021-12-20T18:06:17Z
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.citation.fl_str_mv GRILO, João P. F.; MACEDO, Daniel A.; NASCIMENTO, Rubens M.; MARQUES, Fernando M. B. Electronic conductivity in Gd-doped ceria with salt additions. Electrochimica Acta, [S.L.], v. 318, p. 977-988, set. 2019. Disponível em: https://www.sciencedirect.com/science/article/abs/pii/S0013468619312915?via%3Dihub. Acesso em: 31 mar. 2021. http://dx.doi.org/10.1016/j.electacta.2019.06.148.
dc.identifier.uri.fl_str_mv https://repositorio.ufrn.br/handle/123456789/45493
dc.identifier.issn.none.fl_str_mv 0013-4686
dc.identifier.doi.none.fl_str_mv 10.1016/j.electacta.2019.06.148
identifier_str_mv GRILO, João P. F.; MACEDO, Daniel A.; NASCIMENTO, Rubens M.; MARQUES, Fernando M. B. Electronic conductivity in Gd-doped ceria with salt additions. Electrochimica Acta, [S.L.], v. 318, p. 977-988, set. 2019. Disponível em: https://www.sciencedirect.com/science/article/abs/pii/S0013468619312915?via%3Dihub. Acesso em: 31 mar. 2021. http://dx.doi.org/10.1016/j.electacta.2019.06.148.
0013-4686
10.1016/j.electacta.2019.06.148
url https://repositorio.ufrn.br/handle/123456789/45493
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.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:Repositório Institucional da UFRN
instname:Universidade Federal do Rio Grande do Norte (UFRN)
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instname_str Universidade Federal do Rio Grande do Norte (UFRN)
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collection Repositório Institucional da UFRN
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