High thermoelectric performance in Bi2-xPbxBa2Co2Oy promoted by directional growth and annealing

Bi2-xPbxBa2Co2Oy (x=0.0, 0.2, 0.4, and 0.6) misfit compounds were grown by the laser floating zone technique. Microstructural analysis has shown the formation of thermoelectric grains together with high amount of secondary phases. Thermoelectric grains orientation is increased until 0.4Pb, while fur...

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Autores: Madre, M. A., Costa, F. M., Ferreira, Nuno M., Rasekh, Sh., Torres, M. A., Diez, J. C., Amaral, Vitor S., Amaral, J.S., Sotelo, Andres
Tipo de recurso: artículo
Estado:Versión enviada para evaluación y publicación
Fecha de publicación:2016
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/148418
Acceso en línea:http://hdl.handle.net/10261/148418
Access Level:acceso abierto
Palabra clave:Grain growth
Ceramics
Doping
Electrical properties
Thermopower
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spelling High thermoelectric performance in Bi2-xPbxBa2Co2Oy promoted by directional growth and annealingMadre, M. A.Costa, F. M.Ferreira, Nuno M.Rasekh, Sh.Torres, M. A.Diez, J. C.Amaral, Vitor S.Amaral, J.S.Sotelo, AndresGrain growthCeramicsDopingElectrical propertiesThermopowerBi2-xPbxBa2Co2Oy (x=0.0, 0.2, 0.4, and 0.6) misfit compounds were grown by the laser floating zone technique. Microstructural analysis has shown the formation of thermoelectric grains together with high amount of secondary phases. Thermoelectric grains orientation is increased until 0.4Pb, while further substitution drastically destroys the preferential grain orientation. Electrical resistivity is very low compared with the values obtained in sintered materials, spectacularly increasing power factor. Moreover, the performance of these materials was further improved subjecting the as-grown samples to a postannealing step due to the rise of thermoelectric phase content. These microstructural modifications led to a high decrease of electrical resistivity, improving power factor in around a factor two at room temperature, compared with the as-grown samples. Moreover, the low thermal conductivity of the textured annealed samples leads to a maximum estimated ZT value of 0.53 for the 0.2 Pb-doped samples, much higher than the reported in literature.This research has been supported by the Spanish 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 and to C. Gallego, C. Estepa and J. A. Gomez for their technical assistance. The authors also acknowledge the PEst-C/CTM/LA 25/2013-14, RECI/CTM-CER/0336/2012 co-financed by FEDER, QREN reference COMPETE: FCOMP-01-0124-FEDER-027465, “Facing the challenges of characterizing novel thermal materials and processes (Heat@UA)” and CICECO-Aveiro Institute of Materials (Ref. FCT UID /CTM /50011/2013) funding.Peer ReviewedElsevierFundação para a Ciência e a Tecnologia (Portugal)Ministerio de Economía y Competitividad (España)Quadro de Referência Estratégico Nacional (Portugal)Universidade de AveiroGobierno de AragónEuropean CommissionConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]2017201720162017info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Preprintinfo:eu-repo/semantics/submittedVersionhttp://hdl.handle.net/10261/148418reponame: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-Rhttp://doi.org/10.1016/j.jeurceramsoc.2015.09.034Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/1484182026-05-22T06:33:51Z
dc.title.none.fl_str_mv High thermoelectric performance in Bi2-xPbxBa2Co2Oy promoted by directional growth and annealing
title High thermoelectric performance in Bi2-xPbxBa2Co2Oy promoted by directional growth and annealing
spellingShingle High thermoelectric performance in Bi2-xPbxBa2Co2Oy promoted by directional growth and annealing
Madre, M. A.
Grain growth
Ceramics
Doping
Electrical properties
Thermopower
title_short High thermoelectric performance in Bi2-xPbxBa2Co2Oy promoted by directional growth and annealing
title_full High thermoelectric performance in Bi2-xPbxBa2Co2Oy promoted by directional growth and annealing
title_fullStr High thermoelectric performance in Bi2-xPbxBa2Co2Oy promoted by directional growth and annealing
title_full_unstemmed High thermoelectric performance in Bi2-xPbxBa2Co2Oy promoted by directional growth and annealing
title_sort High thermoelectric performance in Bi2-xPbxBa2Co2Oy promoted by directional growth and annealing
dc.creator.none.fl_str_mv Madre, M. A.
Costa, F. M.
Ferreira, Nuno M.
Rasekh, Sh.
Torres, M. A.
Diez, J. C.
Amaral, Vitor S.
Amaral, J.S.
Sotelo, Andres
author Madre, M. A.
author_facet Madre, M. A.
Costa, F. M.
Ferreira, Nuno M.
Rasekh, Sh.
Torres, M. A.
Diez, J. C.
Amaral, Vitor S.
Amaral, J.S.
Sotelo, Andres
author_role author
author2 Costa, F. M.
Ferreira, Nuno M.
Rasekh, Sh.
Torres, M. A.
Diez, J. C.
Amaral, Vitor S.
Amaral, J.S.
Sotelo, Andres
author2_role author
author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv Fundação para a Ciência e a Tecnologia (Portugal)
Ministerio de Economía y Competitividad (España)
Quadro de Referência Estratégico Nacional (Portugal)
Universidade de Aveiro
Gobierno de Aragón
European Commission
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Grain growth
Ceramics
Doping
Electrical properties
Thermopower
topic Grain growth
Ceramics
Doping
Electrical properties
Thermopower
description Bi2-xPbxBa2Co2Oy (x=0.0, 0.2, 0.4, and 0.6) misfit compounds were grown by the laser floating zone technique. Microstructural analysis has shown the formation of thermoelectric grains together with high amount of secondary phases. Thermoelectric grains orientation is increased until 0.4Pb, while further substitution drastically destroys the preferential grain orientation. Electrical resistivity is very low compared with the values obtained in sintered materials, spectacularly increasing power factor. Moreover, the performance of these materials was further improved subjecting the as-grown samples to a postannealing step due to the rise of thermoelectric phase content. These microstructural modifications led to a high decrease of electrical resistivity, improving power factor in around a factor two at room temperature, compared with the as-grown samples. Moreover, the low thermal conductivity of the textured annealed samples leads to a maximum estimated ZT value of 0.53 for the 0.2 Pb-doped samples, much higher than the reported in literature.
publishDate 2016
dc.date.none.fl_str_mv 2016
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/10261/148418
url http://hdl.handle.net/10261/148418
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
http://doi.org/10.1016/j.jeurceramsoc.2015.09.034
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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score 15.811543

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