Long-term high-temperature stability of directionally grown [Bi2Ba2O4]p[CoO2] rods

[Bi2Ba2O4]p[CoO2] thermoelectric ceramics have been successfully grown from the melt using the laser floating zone method, followed by a thermal treatment at 700°C under air between 0 and 1532 h. The microstructural, thermoelectric, and mechanical properties were evaluated as a function of the therm...

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Authors: Diez, J. C., Madre, M. A., Torres, M. A., Rasekh, Sh., Sotelo, Andres
Format: article
Status:Published version
Publication Date:2017
Country:España
Institution:Consejo Superior de Investigaciones Científicas (CSIC)
Repository:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/148749
Online Access:http://hdl.handle.net/10261/148749
Access Level:Open access
Keyword:Power factor
Flexural strength
Aging
Cobalt oxides
Thermoelectricity
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spelling Long-term high-temperature stability of directionally grown [Bi2Ba2O4]p[CoO2] rodsDiez, J. C.Madre, M. A.Torres, M. A.Rasekh, Sh.Sotelo, AndresPower factorFlexural strengthAgingCobalt oxidesThermoelectricity[Bi2Ba2O4]p[CoO2] thermoelectric ceramics have been successfully grown from the melt using the laser floating zone method, followed by a thermal treatment at 700°C under air between 0 and 1532 h. The microstructural, thermoelectric, and mechanical properties were evaluated as a function of the thermal treatment length. Microstructure has shown that as-grown samples are composed of thermoelectric grains, together with a relatively high amount of secondary phases. Thermal treatment decreased the number and amount of secondary phases, producing nearly single-phase samples after 384 h. Consequently, the thermoelectric properties evaluated through the power factor showed a slight increase with the thermal treatment length, mainly due to the decrease of electrical resistivity, while the Seebeck coefficient was nearly unchanged. On the other hand, flexural strength was practically constant after 24 h thermal treatment.This research has been supported by the Spanish MINECO-FEDER (MAT2013-46505-C3-1-R). The authors wish to thank the Gobierno de Aragón and Fondo Europeo de Desarrollo Regional (Consolidated Research Groups T87 and T12) for financial support.We acknowledge support by the CSIC Open Access Publication Initiative through its Unit of Information Resources for Research (URICI).Peer ReviewedMultidisciplinary Digital Publishing InstituteMinisterio de Economía y Competitividad (España)European CommissionConsejo Superior de Investigaciones Científicas (España)Gobierno de AragónConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]2017201720172017info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/148749reponame: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/10.3390/ma10020146Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/1487492026-05-22T06:33:51Z
dc.title.none.fl_str_mv Long-term high-temperature stability of directionally grown [Bi2Ba2O4]p[CoO2] rods
title Long-term high-temperature stability of directionally grown [Bi2Ba2O4]p[CoO2] rods
spellingShingle Long-term high-temperature stability of directionally grown [Bi2Ba2O4]p[CoO2] rods
Diez, J. C.
Power factor
Flexural strength
Aging
Cobalt oxides
Thermoelectricity
title_short Long-term high-temperature stability of directionally grown [Bi2Ba2O4]p[CoO2] rods
title_full Long-term high-temperature stability of directionally grown [Bi2Ba2O4]p[CoO2] rods
title_fullStr Long-term high-temperature stability of directionally grown [Bi2Ba2O4]p[CoO2] rods
title_full_unstemmed Long-term high-temperature stability of directionally grown [Bi2Ba2O4]p[CoO2] rods
title_sort Long-term high-temperature stability of directionally grown [Bi2Ba2O4]p[CoO2] rods
dc.creator.none.fl_str_mv Diez, J. C.
Madre, M. A.
Torres, M. A.
Rasekh, Sh.
Sotelo, Andres
author Diez, J. C.
author_facet Diez, J. C.
Madre, M. A.
Torres, M. A.
Rasekh, Sh.
Sotelo, Andres
author_role author
author2 Madre, M. A.
Torres, M. A.
Rasekh, Sh.
Sotelo, Andres
author2_role author
author
author
author
dc.contributor.none.fl_str_mv Ministerio de Economía y Competitividad (España)
European Commission
Consejo Superior de Investigaciones Científicas (España)
Gobierno de Aragón
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Power factor
Flexural strength
Aging
Cobalt oxides
Thermoelectricity
topic Power factor
Flexural strength
Aging
Cobalt oxides
Thermoelectricity
description [Bi2Ba2O4]p[CoO2] thermoelectric ceramics have been successfully grown from the melt using the laser floating zone method, followed by a thermal treatment at 700°C under air between 0 and 1532 h. The microstructural, thermoelectric, and mechanical properties were evaluated as a function of the thermal treatment length. Microstructure has shown that as-grown samples are composed of thermoelectric grains, together with a relatively high amount of secondary phases. Thermal treatment decreased the number and amount of secondary phases, producing nearly single-phase samples after 384 h. Consequently, the thermoelectric properties evaluated through the power factor showed a slight increase with the thermal treatment length, mainly due to the decrease of electrical resistivity, while the Seebeck coefficient was nearly unchanged. On the other hand, flexural strength was practically constant after 24 h thermal treatment.
publishDate 2017
dc.date.none.fl_str_mv 2017
2017
2017
2017
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/10261/148749
url http://hdl.handle.net/10261/148749
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/10.3390/ma10020146
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Multidisciplinary Digital Publishing Institute
publisher.none.fl_str_mv Multidisciplinary Digital Publishing Institute
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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