Enhancement of mechanical and thermoelectric properties of Ca3Co4O9 by Ag addition

Ca3Co4O9 + x wt.% Ag (x = 0, 1, 3, 5, and 10) polycrystalline thermoelectric ceramics have been prepared by a sol–gel route via nitrates followed by high temperature treatment before sintering. Out-of-plane XRD data have shown that major phase is the Ca3Co4O9 one, accompanied by metallic Ag. SEM obs...

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Detalles Bibliográficos
Autores: Kahraman, F., Madre, M. A., Rasekh, Sh., Salvador, C., Bosque, P., Torres, M. A., Diez, J. C., Sotelo, Andres
Tipo de recurso: artículo
Estado:Versión enviada para evaluación y publicación
Fecha de publicación:2015
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/147688
Acceso en línea:http://hdl.handle.net/10261/147688
Access Level:acceso abierto
Palabra clave:Thermoelectricity
Flexural strength
Ca3Co4O9
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spelling Enhancement of mechanical and thermoelectric properties of Ca3Co4O9 by Ag additionKahraman, F.Madre, M. A.Rasekh, Sh.Salvador, C.Bosque, P.Torres, M. A.Diez, J. C.Sotelo, AndresThermoelectricityFlexural strengthCa3Co4O9Ca3Co4O9 + x wt.% Ag (x = 0, 1, 3, 5, and 10) polycrystalline thermoelectric ceramics have been prepared by a sol–gel route via nitrates followed by high temperature treatment before sintering. Out-of-plane XRD data have shown that major phase is the Ca3Co4O9 one, accompanied by metallic Ag. SEM observations have agreed with the XRD data. Apparent density measurements have revealed that all samples possess densities ranging between 80% and 90% when Ag content is raised. Mechanical properties have shown a drastic increase of bending stress when Ag is added to the samples. Electrical resistivity decreases with the Ag content, compared with the pure ones, while Seebeck coefficient slightly decreases. Maximum power factor values around 0.43 mW/K2 m at 800 °C have been achieved for the 10 wt.% Ag samples which is much higher than the measured in the pure Ca3Co4O9 samples.This research has been supported by MINECO-FEDER (MAT2013-46505-C3-1-R). The authors wish to thank the Gobierno de Aragón-Fondo Social Europeo (Consolidated Research Groups T12 and T87) for financial support.Peer ReviewedElsevierMinisterio de Economía y Competitividad (España)European CommissionGobierno de AragónConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]2017201720152017info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Preprintinfo:eu-repo/semantics/submittedVersionhttp://hdl.handle.net/10261/147688reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/MAT2013-46505-C3-1-Rhttps://doi.org/10.1016/j.jeurceramsoc.2015.05.029Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/1476882026-05-22T06:33:51Z
dc.title.none.fl_str_mv Enhancement of mechanical and thermoelectric properties of Ca3Co4O9 by Ag addition
title Enhancement of mechanical and thermoelectric properties of Ca3Co4O9 by Ag addition
spellingShingle Enhancement of mechanical and thermoelectric properties of Ca3Co4O9 by Ag addition
Kahraman, F.
Thermoelectricity
Flexural strength
Ca3Co4O9
title_short Enhancement of mechanical and thermoelectric properties of Ca3Co4O9 by Ag addition
title_full Enhancement of mechanical and thermoelectric properties of Ca3Co4O9 by Ag addition
title_fullStr Enhancement of mechanical and thermoelectric properties of Ca3Co4O9 by Ag addition
title_full_unstemmed Enhancement of mechanical and thermoelectric properties of Ca3Co4O9 by Ag addition
title_sort Enhancement of mechanical and thermoelectric properties of Ca3Co4O9 by Ag addition
dc.creator.none.fl_str_mv Kahraman, F.
Madre, M. A.
Rasekh, Sh.
Salvador, C.
Bosque, P.
Torres, M. A.
Diez, J. C.
Sotelo, Andres
author Kahraman, F.
author_facet Kahraman, F.
Madre, M. A.
Rasekh, Sh.
Salvador, C.
Bosque, P.
Torres, M. A.
Diez, J. C.
Sotelo, Andres
author_role author
author2 Madre, M. A.
Rasekh, Sh.
Salvador, C.
Bosque, P.
Torres, M. A.
Diez, J. C.
Sotelo, Andres
author2_role author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv Ministerio de Economía y Competitividad (España)
European Commission
Gobierno de Aragón
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Thermoelectricity
Flexural strength
Ca3Co4O9
topic Thermoelectricity
Flexural strength
Ca3Co4O9
description Ca3Co4O9 + x wt.% Ag (x = 0, 1, 3, 5, and 10) polycrystalline thermoelectric ceramics have been prepared by a sol–gel route via nitrates followed by high temperature treatment before sintering. Out-of-plane XRD data have shown that major phase is the Ca3Co4O9 one, accompanied by metallic Ag. SEM observations have agreed with the XRD data. Apparent density measurements have revealed that all samples possess densities ranging between 80% and 90% when Ag content is raised. Mechanical properties have shown a drastic increase of bending stress when Ag is added to the samples. Electrical resistivity decreases with the Ag content, compared with the pure ones, while Seebeck coefficient slightly decreases. Maximum power factor values around 0.43 mW/K2 m at 800 °C have been achieved for the 10 wt.% Ag samples which is much higher than the measured in the pure Ca3Co4O9 samples.
publishDate 2015
dc.date.none.fl_str_mv 2015
2017
2017
2017
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Preprint
info:eu-repo/semantics/submittedVersion
format article
status_str submittedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/147688
url http://hdl.handle.net/10261/147688
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv #PLACEHOLDER_PARENT_METADATA_VALUE#
info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/MAT2013-46505-C3-1-R
https://doi.org/10.1016/j.jeurceramsoc.2015.05.029
Sí
dc.rights.none.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:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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