Electrical conductivity and microstructure of NiO-CGO composites prepared by one-step synthesis

Detalhes bibliográficos
Autor(a) principal: Nascimento, Rubens Maribondo do
Data de Publicação: 2013
Outros Autores: Macedo, Daniel Araújo de, Figueiredo, Filipe Miguel Lebre, Patrício, Sónia Gonçalves, Martinelli, Antonio Eduardo, Paskocimas, Carlos Alberto, Marques, Fernando Manuel Bico
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFRN
Texto Completo: https://repositorio.ufrn.br/handle/123456789/45734
http://dx.doi.org/10.1149/05022.0021ecst
Resumo: The correlation between the microstructure and electrical properties of NiO-Ce0.9Gd0.1O1.95 (NiO-CGO) composites prepared by a one-step synthesis method is reported in the present work, and compared to conventional samples synthesized by mechanically mixing commercial powders. Samples sintered between 1350 and 1450 °C had their microstructures and electrical properties investigated by scanning electron microscopy (SEM) and impedance spectroscopy. The total electrical conductivity in the range of 100 – 500 °C of one-step composites is more than one order of magnitude higher than for conventional material. This result is associated to the presence of a network of well-connected and homogeneously distributed NiO grains shown by SEM for the one-step composite, which is responsible for its improved percolative behavior and lower activation energy (0.24 eV at 250 – 650 °C).
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spelling Nascimento, Rubens Maribondo doMacedo, Daniel Araújo deFigueiredo, Filipe Miguel LebrePatrício, Sónia GonçalvesMartinelli, Antonio EduardoPaskocimas, Carlos AlbertoMarques, Fernando Manuel Bico2022-01-31T14:09:51Z2022-01-31T14:09:51Z2013-04-01MACEDO, Daniel Araújo de; FIGUEIREDO, Filipe Miguel Lebre; PATRICIO, Sónia Gonçalves; NASCIMENTO, Rubens Maribondo do; MARTINELLI, Antonio Eduardo; PASKOCIMAS, Carlos Alberto; MARQUES, Fernando Manuel Bico. Electrical conductivity and microstructure of NiO-CGO composites prepared by one-step synthesis. Ecs Transactions, [S.L.], v. 50, n. 22, p. 21-31, 1 abr. 2013. The Electrochemical Society. http://dx.doi.org/10.1149/05022.0021ecst. Disponível em: https://iopscience.iop.org/article/10.1149/05022.0021ecst. Acesso em: 08 abr. 2021.Print: 1938-5862Electronic: 1938-6737https://repositorio.ufrn.br/handle/123456789/45734http://dx.doi.org/10.1149/05022.0021ecstThe correlation between the microstructure and electrical properties of NiO-Ce0.9Gd0.1O1.95 (NiO-CGO) composites prepared by a one-step synthesis method is reported in the present work, and compared to conventional samples synthesized by mechanically mixing commercial powders. Samples sintered between 1350 and 1450 °C had their microstructures and electrical properties investigated by scanning electron microscopy (SEM) and impedance spectroscopy. The total electrical conductivity in the range of 100 – 500 °C of one-step composites is more than one order of magnitude higher than for conventional material. This result is associated to the presence of a network of well-connected and homogeneously distributed NiO grains shown by SEM for the one-step composite, which is responsible for its improved percolative behavior and lower activation energy (0.24 eV at 250 – 650 °C).The correlation between the microstructure and electrical properties of NiO-Ce0.9Gd0.1O1.95 (NiO-CGO) composites prepared by a one-step synthesis method is reported in the present work, and compared to conventional samples synthesized by mechanically mixing commercial powders. Samples sintered between 1350 and 1450 °C had their microstructures and electrical properties investigated by scanning electron microscopy (SEM) and impedance spectroscopy. The total electrical conductivity in the range of 100 – 500 °C of one-step composites is more than one order of magnitude higher than for conventional material. This result is associated to the presence of a network of well-connected and homogeneously distributed NiO grains shown by SEM for the one-step composite, which is responsible for its improved percolative behavior and lower activation energy (0.24 eV at 250 – 650 °C).IOP Publishingpropriedades elétricascondutividade elétricamicroscopia eletrônica de varreduraElectrical conductivity and microstructure of NiO-CGO composites prepared by one-step synthesisinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleengreponame: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/123456789/45734/2/license_rdfe39d27027a6cc9cb039ad269a5db8e34MD52LICENSElicense.txtlicense.txttext/plain; charset=utf-81484https://repositorio.ufrn.br/bitstream/123456789/45734/3/license.txte9597aa2854d128fd968be5edc8a28d9MD53123456789/457342022-10-19 16:43:37.012oai:https://repositorio.ufrn.br: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Repositório de PublicaçõesPUBhttp://repositorio.ufrn.br/oai/opendoar:2022-10-19T19:43:37Repositório Institucional da UFRN - Universidade Federal do Rio Grande do Norte (UFRN)false
dc.title.pt_BR.fl_str_mv Electrical conductivity and microstructure of NiO-CGO composites prepared by one-step synthesis
title Electrical conductivity and microstructure of NiO-CGO composites prepared by one-step synthesis
spellingShingle Electrical conductivity and microstructure of NiO-CGO composites prepared by one-step synthesis
Nascimento, Rubens Maribondo do
propriedades elétricas
condutividade elétrica
microscopia eletrônica de varredura
title_short Electrical conductivity and microstructure of NiO-CGO composites prepared by one-step synthesis
title_full Electrical conductivity and microstructure of NiO-CGO composites prepared by one-step synthesis
title_fullStr Electrical conductivity and microstructure of NiO-CGO composites prepared by one-step synthesis
title_full_unstemmed Electrical conductivity and microstructure of NiO-CGO composites prepared by one-step synthesis
title_sort Electrical conductivity and microstructure of NiO-CGO composites prepared by one-step synthesis
author Nascimento, Rubens Maribondo do
author_facet Nascimento, Rubens Maribondo do
Macedo, Daniel Araújo de
Figueiredo, Filipe Miguel Lebre
Patrício, Sónia Gonçalves
Martinelli, Antonio Eduardo
Paskocimas, Carlos Alberto
Marques, Fernando Manuel Bico
author_role author
author2 Macedo, Daniel Araújo de
Figueiredo, Filipe Miguel Lebre
Patrício, Sónia Gonçalves
Martinelli, Antonio Eduardo
Paskocimas, Carlos Alberto
Marques, Fernando Manuel Bico
author2_role author
author
author
author
author
author
dc.contributor.author.fl_str_mv Nascimento, Rubens Maribondo do
Macedo, Daniel Araújo de
Figueiredo, Filipe Miguel Lebre
Patrício, Sónia Gonçalves
Martinelli, Antonio Eduardo
Paskocimas, Carlos Alberto
Marques, Fernando Manuel Bico
dc.subject.por.fl_str_mv propriedades elétricas
condutividade elétrica
microscopia eletrônica de varredura
topic propriedades elétricas
condutividade elétrica
microscopia eletrônica de varredura
description The correlation between the microstructure and electrical properties of NiO-Ce0.9Gd0.1O1.95 (NiO-CGO) composites prepared by a one-step synthesis method is reported in the present work, and compared to conventional samples synthesized by mechanically mixing commercial powders. Samples sintered between 1350 and 1450 °C had their microstructures and electrical properties investigated by scanning electron microscopy (SEM) and impedance spectroscopy. The total electrical conductivity in the range of 100 – 500 °C of one-step composites is more than one order of magnitude higher than for conventional material. This result is associated to the presence of a network of well-connected and homogeneously distributed NiO grains shown by SEM for the one-step composite, which is responsible for its improved percolative behavior and lower activation energy (0.24 eV at 250 – 650 °C).
publishDate 2013
dc.date.issued.fl_str_mv 2013-04-01
dc.date.accessioned.fl_str_mv 2022-01-31T14:09:51Z
dc.date.available.fl_str_mv 2022-01-31T14:09:51Z
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 MACEDO, Daniel Araújo de; FIGUEIREDO, Filipe Miguel Lebre; PATRICIO, Sónia Gonçalves; NASCIMENTO, Rubens Maribondo do; MARTINELLI, Antonio Eduardo; PASKOCIMAS, Carlos Alberto; MARQUES, Fernando Manuel Bico. Electrical conductivity and microstructure of NiO-CGO composites prepared by one-step synthesis. Ecs Transactions, [S.L.], v. 50, n. 22, p. 21-31, 1 abr. 2013. The Electrochemical Society. http://dx.doi.org/10.1149/05022.0021ecst. Disponível em: https://iopscience.iop.org/article/10.1149/05022.0021ecst. Acesso em: 08 abr. 2021.
dc.identifier.uri.fl_str_mv https://repositorio.ufrn.br/handle/123456789/45734
dc.identifier.issn.none.fl_str_mv Print: 1938-5862
Electronic: 1938-6737
dc.identifier.doi.none.fl_str_mv http://dx.doi.org/10.1149/05022.0021ecst
identifier_str_mv MACEDO, Daniel Araújo de; FIGUEIREDO, Filipe Miguel Lebre; PATRICIO, Sónia Gonçalves; NASCIMENTO, Rubens Maribondo do; MARTINELLI, Antonio Eduardo; PASKOCIMAS, Carlos Alberto; MARQUES, Fernando Manuel Bico. Electrical conductivity and microstructure of NiO-CGO composites prepared by one-step synthesis. Ecs Transactions, [S.L.], v. 50, n. 22, p. 21-31, 1 abr. 2013. The Electrochemical Society. http://dx.doi.org/10.1149/05022.0021ecst. Disponível em: https://iopscience.iop.org/article/10.1149/05022.0021ecst. Acesso em: 08 abr. 2021.
Print: 1938-5862
Electronic: 1938-6737
url https://repositorio.ufrn.br/handle/123456789/45734
http://dx.doi.org/10.1149/05022.0021ecst
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