High-temperature stability of hot-pressed Sr-doped Ca3Co4O9

Bulk textured Ca2.93Sr0.07Co4O9 samples have been prepared by hot uniaxial pressing followed by thermal treatment at 800°C under air for between 0 h and 1532 h. The microstructural, thermoelectric, and mechanical properties as well as density of all the samples were evaluated as a function of the du...

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Detalles Bibliográficos
Autores: Madre, M. A., Urrutibeascoa, Idoia, Garcia, Gustavo, Torres, M. A., Sotelo, Andres, Diez, J. C.
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2019
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/181589
Acceso en línea:http://hdl.handle.net/10261/181589
Access Level:acceso abierto
Palabra clave:Thermoelectricity
Cobalt oxides
Flexural strength
Power factor
Thermal stability
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spelling High-temperature stability of hot-pressed Sr-doped Ca3Co4O9Madre, M. A.Urrutibeascoa, IdoiaGarcia, GustavoTorres, M. A.Sotelo, AndresDiez, J. C.ThermoelectricityCobalt oxidesFlexural strengthPower factorThermal stabilityBulk textured Ca2.93Sr0.07Co4O9 samples have been prepared by hot uniaxial pressing followed by thermal treatment at 800°C under air for between 0 h and 1532 h. The microstructural, thermoelectric, and mechanical properties as well as density of all the samples were evaluated as a function of the duration of thermal treatment. Scanning electron microscopy characterization showed that the samples were mainly composed of Sr-doped Ca3Co4O9 thermoelectric (TE) phase, accompanied by minor amounts of Sr-free Ca3Co2O6 secondary phase. After an initial decrease of density after the first aging treatment, it remained practically constant for longer durations. This behavior is reflected in the mechanical properties, which slightly decreased after 12 h of thermal treatment, compared with the as-hot-pressed state, but remained practically constant after larger durations. However, the TE properties were not affected by the aging process, lying within typical errors independently of the aging duration. Moreover, the power factor values measured at 850°C (> 0.60 mW/K2 m) lie among the highest obtained so far for this kind of material.This research has been supported by the Spanish MINECO-FEDER (MAT2017-82183-C3-1-R), the Basque Government Industry Department through the Elkartek program (Exp: KK-2017/00099 - HiTOM), and the Gobierno de Aragón-FEDER (Research Group T 54-17R).Peer reviewedSpringer NatureMinerals, Metals and Materials SocietyAgencia Estatal de Investigación (España)Ministerio de Economía y Competitividad (España)Ministerio de Ciencia, Innovación y Universidades (España)European CommissionEusko JaurlaritzaGobierno de AragónConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]201920192019info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Postprintinfo:eu-repo/semantics/acceptedVersionhttp://hdl.handle.net/10261/181589reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE#MAT2017-82183-C3-1-R/AEI/10.13039/501100011033info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/MAT2017-82183-C3-1-Rhttps://doi.org/10.1007/s11664-018-6748-xSíinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/1815892026-05-22T06:33:51Z
dc.title.none.fl_str_mv High-temperature stability of hot-pressed Sr-doped Ca3Co4O9
title High-temperature stability of hot-pressed Sr-doped Ca3Co4O9
spellingShingle High-temperature stability of hot-pressed Sr-doped Ca3Co4O9
Madre, M. A.
Thermoelectricity
Cobalt oxides
Flexural strength
Power factor
Thermal stability
title_short High-temperature stability of hot-pressed Sr-doped Ca3Co4O9
title_full High-temperature stability of hot-pressed Sr-doped Ca3Co4O9
title_fullStr High-temperature stability of hot-pressed Sr-doped Ca3Co4O9
title_full_unstemmed High-temperature stability of hot-pressed Sr-doped Ca3Co4O9
title_sort High-temperature stability of hot-pressed Sr-doped Ca3Co4O9
dc.creator.none.fl_str_mv Madre, M. A.
Urrutibeascoa, Idoia
Garcia, Gustavo
Torres, M. A.
Sotelo, Andres
Diez, J. C.
author Madre, M. A.
author_facet Madre, M. A.
Urrutibeascoa, Idoia
Garcia, Gustavo
Torres, M. A.
Sotelo, Andres
Diez, J. C.
author_role author
author2 Urrutibeascoa, Idoia
Garcia, Gustavo
Torres, M. A.
Sotelo, Andres
Diez, J. C.
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv Agencia Estatal de Investigación (España)
Ministerio de Economía y Competitividad (España)
Ministerio de Ciencia, Innovación y Universidades (España)
European Commission
Eusko Jaurlaritza
Gobierno de Aragón
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Thermoelectricity
Cobalt oxides
Flexural strength
Power factor
Thermal stability
topic Thermoelectricity
Cobalt oxides
Flexural strength
Power factor
Thermal stability
description Bulk textured Ca2.93Sr0.07Co4O9 samples have been prepared by hot uniaxial pressing followed by thermal treatment at 800°C under air for between 0 h and 1532 h. The microstructural, thermoelectric, and mechanical properties as well as density of all the samples were evaluated as a function of the duration of thermal treatment. Scanning electron microscopy characterization showed that the samples were mainly composed of Sr-doped Ca3Co4O9 thermoelectric (TE) phase, accompanied by minor amounts of Sr-free Ca3Co2O6 secondary phase. After an initial decrease of density after the first aging treatment, it remained practically constant for longer durations. This behavior is reflected in the mechanical properties, which slightly decreased after 12 h of thermal treatment, compared with the as-hot-pressed state, but remained practically constant after larger durations. However, the TE properties were not affected by the aging process, lying within typical errors independently of the aging duration. Moreover, the power factor values measured at 850°C (> 0.60 mW/K2 m) lie among the highest obtained so far for this kind of material.
publishDate 2019
dc.date.none.fl_str_mv 2019
2019
2019
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Postprint
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/181589
url http://hdl.handle.net/10261/181589
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv #PLACEHOLDER_PARENT_METADATA_VALUE#
#PLACEHOLDER_PARENT_METADATA_VALUE#
MAT2017-82183-C3-1-R/AEI/10.13039/501100011033
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/MAT2017-82183-C3-1-R
https://doi.org/10.1007/s11664-018-6748-x
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Springer Nature
Minerals, Metals and Materials Society
publisher.none.fl_str_mv Springer Nature
Minerals, Metals and Materials Society
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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