Influence of Ca substitution by Mg on the Ca3Co 4O9 performances

[EN]: Ca3-xMgxCo4O9 polycrystalline thermoelectric ceramics with small amounts of Mg have been synthesized by the classical solid state method. Microstructural characterizations have shown that all the Mg has been incorporated into the Ca3Co4O 9 structure and no Mg-based secondary phases have been i...

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Detalhes bibliográficos
Autores: Constantinescu, G., Rasekh, Sh., Torres, M. A., Chocarro, C., Diez, J. C., Madre, M. A., Sotelo, Andres
Formato: artículo
Estado:Versión publicada
Fecha de publicación:2014
País:España
Recursos:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/118324
Acesso em linha:http://hdl.handle.net/10261/118324
Access Level:acceso abierto
Palavra-chave:Poder termoeléctrico
Propiedades eléctricas
Cobaltitas
Sinterizado
Dopado
Thermopower
Doping
Sintering
Cobaltites
Electrical properties
id ES_a99bab3ea9fb4babd2f8474fb48a2e0f
oai_identifier_str oai:digital.csic.es:10261/118324
network_acronym_str ES
network_name_str España
repository_id_str
spelling Influence of Ca substitution by Mg on the Ca3Co 4O9 performancesInfluencia de la sustitucion de Ca por Mg en las prestaciones del compuesto Ca3Co4O9Constantinescu, G.Rasekh, Sh.Torres, M. A.Chocarro, C.Diez, J. C.Madre, M. A.Sotelo, AndresPoder termoeléctricoPropiedades eléctricasCobaltitasSinterizadoDopadoThermopowerDopingSinteringCobaltitesElectrical properties[EN]: Ca3-xMgxCo4O9 polycrystalline thermoelectric ceramics with small amounts of Mg have been synthesized by the classical solid state method. Microstructural characterizations have shown that all the Mg has been incorporated into the Ca3Co4O 9 structure and no Mg-based secondary phases have been identified. Apparent density measurements have shown that samples do not modify their density until 0.05 Mg content, decreasing for higher contents. Electrical resistivity decreases and Seebeck coefficient slightly raises when Mg content increases until 0.05 Mg addition. The improvement in both parameters leads to higher power factor values than the usually obtained in samples prepared by the conventional solid state routes and close to those obtained in textured materials.[ES]: Se han preparado cerámicas termoeléctricas policristalinas de Ca3-xMgxCo4O9, con pequeñas cantidades de Mg, utilizando el método clásico de estado sólido. La caracterización microestructural ha mostrado que el Mg se ha incorporado en la estructura del Ca3Co4O9 y que no se han formado fases secundarias con el Mg. Las medidas de densidad aparente han mostrado que las muestras prácticamente poseen la misma densidad hasta un contenido de 0.05 Mg, disminuyendo para contenidos mayores. La resistividad eléctrica disminuye y el coeficiente Seebeck aumenta cuando el contenido de Mg se incrementa hasta valores de 0.05. La mejora de ambos parámetros conduce a valores del factor de potencia mayores que los obtenidos en muestras preparadas por la vía convencional de estado sólido, alcanzando valores próximos a los que se encuentran en materiales texturados.The authors wish to thank the Gobierno de Aragón (Research Groups T12 and T87) for financial support. Sh. Rasekh also acknowledges a JAE-PreDoc 2010 grant from CSIC.Peer ReviewedSociedad Española de Cerámica y VidrioConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]2015201520142015info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/118324reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttp://dx.doi.org/10.3989 / cyv.2014.v53.i1Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/1183242026-05-22T06:33:51Z
dc.title.none.fl_str_mv Influence of Ca substitution by Mg on the Ca3Co 4O9 performances
Influencia de la sustitucion de Ca por Mg en las prestaciones del compuesto Ca3Co4O9
title Influence of Ca substitution by Mg on the Ca3Co 4O9 performances
spellingShingle Influence of Ca substitution by Mg on the Ca3Co 4O9 performances
Constantinescu, G.
Poder termoeléctrico
Propiedades eléctricas
Cobaltitas
Sinterizado
Dopado
Thermopower
Doping
Sintering
Cobaltites
Electrical properties
title_short Influence of Ca substitution by Mg on the Ca3Co 4O9 performances
title_full Influence of Ca substitution by Mg on the Ca3Co 4O9 performances
title_fullStr Influence of Ca substitution by Mg on the Ca3Co 4O9 performances
title_full_unstemmed Influence of Ca substitution by Mg on the Ca3Co 4O9 performances
title_sort Influence of Ca substitution by Mg on the Ca3Co 4O9 performances
dc.creator.none.fl_str_mv Constantinescu, G.
Rasekh, Sh.
Torres, M. A.
Chocarro, C.
Diez, J. C.
Madre, M. A.
Sotelo, Andres
author Constantinescu, G.
author_facet Constantinescu, G.
Rasekh, Sh.
Torres, M. A.
Chocarro, C.
Diez, J. C.
Madre, M. A.
Sotelo, Andres
author_role author
author2 Rasekh, Sh.
Torres, M. A.
Chocarro, C.
Diez, J. C.
Madre, M. A.
Sotelo, Andres
author2_role author
author
author
author
author
author
dc.contributor.none.fl_str_mv Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Poder termoeléctrico
Propiedades eléctricas
Cobaltitas
Sinterizado
Dopado
Thermopower
Doping
Sintering
Cobaltites
Electrical properties
topic Poder termoeléctrico
Propiedades eléctricas
Cobaltitas
Sinterizado
Dopado
Thermopower
Doping
Sintering
Cobaltites
Electrical properties
description [EN]: Ca3-xMgxCo4O9 polycrystalline thermoelectric ceramics with small amounts of Mg have been synthesized by the classical solid state method. Microstructural characterizations have shown that all the Mg has been incorporated into the Ca3Co4O 9 structure and no Mg-based secondary phases have been identified. Apparent density measurements have shown that samples do not modify their density until 0.05 Mg content, decreasing for higher contents. Electrical resistivity decreases and Seebeck coefficient slightly raises when Mg content increases until 0.05 Mg addition. The improvement in both parameters leads to higher power factor values than the usually obtained in samples prepared by the conventional solid state routes and close to those obtained in textured materials.
publishDate 2014
dc.date.none.fl_str_mv 2014
2015
2015
2015
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Publisher's version
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/118324
url http://hdl.handle.net/10261/118324
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv http://dx.doi.org/10.3989 / cyv.2014.v53.i1
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Sociedad Española de Cerámica y Vidrio
publisher.none.fl_str_mv Sociedad Española de Cerámica y Vidrio
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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score 15,811543

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