Role of Ag in textured-annealed Bi2Ca2Co1.7Ox thermoelectric ceramic

Bi2Ca2Co1.7Ox thermoelectric ceramics with small Ag additions (0, 1, 2, 3, 4, and 5 wt.%) have been successfully grown from the melt, using the laser floating zone method and subsequently annealed at 800 °C for 24 h. The microstructure has shown a reduction of the amount of secondary phases for Ag c...

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Autores: Flahaut, D., Allouche, J., Sotelo, A., Rasekh, Sh., Torres, M.A., Madre, M.A., Diez, J.C.
Tipo de documento: artigo
Estado:Versión aceptada para publicación
Data de publicação:2016
País:España
Recursos:Universidad de Zaragoza
Repositório:Zaguán. Repositorio Digital de la Universidad de Zaragoza
OAI Identifier:oai:zaguan.unizar.es:56778
Acesso em linha:http://zaguan.unizar.es/record/56778
Access Level:Acceso aberto
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spelling Role of Ag in textured-annealed Bi2Ca2Co1.7Ox thermoelectric ceramicFlahaut, D.Allouche, J.Sotelo, A.Rasekh, Sh.Torres, M.A.Madre, M.A.Diez, J.C.Bi2Ca2Co1.7Ox thermoelectric ceramics with small Ag additions (0, 1, 2, 3, 4, and 5 wt.%) have been successfully grown from the melt, using the laser floating zone method and subsequently annealed at 800 °C for 24 h. The microstructure has shown a reduction of the amount of secondary phases for Ag contents up to 4 wt.%. This microstructural evolution leads to a decrease of the electrical resistivity values until an Ag content of 4 wt.%, whereas Seebeck coefficient has been maintained unchanged. This is in agreement with the presence of metallic Ag in all samples, confirmed not only by Energy Dispersive Spectrometry but also by X-ray photoelectron and Auger spectroscopy. These electrical properties lead to maximum power factor values of about 0.30 mW/K2.m at 650 °C for the 4 wt.% Ag containing samples, which is among the best results obtained for this type of materials.2016info:eu-repo/semantics/articleinfo:eu-repo/semantics/acceptedVersionapplication/pdfhttp://zaguan.unizar.es/record/56778reponame:Zaguán. Repositorio Digital de la Universidad de Zaragozainstname:Universidad de ZaragozaInglésinfo:eu-repo/grantAgreement/ES/MINECO/MAT2013-46505-C3-1-Rinfo:eu-repo/semantics/openAccessoai:zaguan.unizar.es:567782026-05-29T13:59:51Z
dc.title.none.fl_str_mv Role of Ag in textured-annealed Bi2Ca2Co1.7Ox thermoelectric ceramic
title Role of Ag in textured-annealed Bi2Ca2Co1.7Ox thermoelectric ceramic
spellingShingle Role of Ag in textured-annealed Bi2Ca2Co1.7Ox thermoelectric ceramic
Flahaut, D.
title_short Role of Ag in textured-annealed Bi2Ca2Co1.7Ox thermoelectric ceramic
title_full Role of Ag in textured-annealed Bi2Ca2Co1.7Ox thermoelectric ceramic
title_fullStr Role of Ag in textured-annealed Bi2Ca2Co1.7Ox thermoelectric ceramic
title_full_unstemmed Role of Ag in textured-annealed Bi2Ca2Co1.7Ox thermoelectric ceramic
title_sort Role of Ag in textured-annealed Bi2Ca2Co1.7Ox thermoelectric ceramic
dc.creator.none.fl_str_mv Flahaut, D.
Allouche, J.
Sotelo, A.
Rasekh, Sh.
Torres, M.A.
Madre, M.A.
Diez, J.C.
author Flahaut, D.
author_facet Flahaut, D.
Allouche, J.
Sotelo, A.
Rasekh, Sh.
Torres, M.A.
Madre, M.A.
Diez, J.C.
author_role author
author2 Allouche, J.
Sotelo, A.
Rasekh, Sh.
Torres, M.A.
Madre, M.A.
Diez, J.C.
author2_role author
author
author
author
author
author
description Bi2Ca2Co1.7Ox thermoelectric ceramics with small Ag additions (0, 1, 2, 3, 4, and 5 wt.%) have been successfully grown from the melt, using the laser floating zone method and subsequently annealed at 800 °C for 24 h. The microstructure has shown a reduction of the amount of secondary phases for Ag contents up to 4 wt.%. This microstructural evolution leads to a decrease of the electrical resistivity values until an Ag content of 4 wt.%, whereas Seebeck coefficient has been maintained unchanged. This is in agreement with the presence of metallic Ag in all samples, confirmed not only by Energy Dispersive Spectrometry but also by X-ray photoelectron and Auger spectroscopy. These electrical properties lead to maximum power factor values of about 0.30 mW/K2.m at 650 °C for the 4 wt.% Ag containing samples, which is among the best results obtained for this type of materials.
publishDate 2016
dc.date.none.fl_str_mv 2016
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/acceptedVersion
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status_str acceptedVersion
dc.identifier.none.fl_str_mv http://zaguan.unizar.es/record/56778
url http://zaguan.unizar.es/record/56778
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv info:eu-repo/grantAgreement/ES/MINECO/MAT2013-46505-C3-1-R
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv
publisher.none.fl_str_mv
dc.source.none.fl_str_mv reponame:Zaguán. Repositorio Digital de la Universidad de Zaragoza
instname:Universidad de Zaragoza
instname_str Universidad de Zaragoza
reponame_str Zaguán. Repositorio Digital de la Universidad de Zaragoza
collection Zaguán. Repositorio Digital de la Universidad de Zaragoza
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score 15,300719

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