Use of laser technology to produce high thermoelectric performances in Bi2Sr2Co1.8Ox

Bi2Sr2Co1.8Ox bulk polycrystalline ceramics were prepared by conventional sintering of powders, obtained by polymer solution method and by directional growth using the laser floating zone technique. Microstructural analysis showed randomly oriented grains in the classical sintered materials, while i...

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Autores: Rasekh, Sh., Costa, F. M., Ferreira, Nuno M., Torres, M. A., Madre, 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:10261/121179
Acceso en línea:http://hdl.handle.net/10261/121179
Access Level:acceso abierto
Palabra clave:Thermoelectrics
Laser processing
Seebeck coefficient
Electrical resistivity
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spelling Use of laser technology to produce high thermoelectric performances in Bi2Sr2Co1.8OxRasekh, Sh.Costa, F. M.Ferreira, Nuno M.Torres, M. A.Madre, M. A.Diez, J. C.Sotelo, AndresThermoelectricsLaser processingSeebeck coefficientElectrical resistivityBi2Sr2Co1.8Ox bulk polycrystalline ceramics were prepared by conventional sintering of powders, obtained by polymer solution method and by directional growth using the laser floating zone technique. Microstructural analysis showed randomly oriented grains in the classical sintered materials, while in the laser-textured samples well oriented crystals with the c-axis nearly perpendicular to the growth direction were observed. A significant reduction on electrical resistivity, compared with the sintered materials, was observed due to the decrease on the secondary phases content. As a consequence, a raise on the power factor of about 2 and 5 times, compared with the classically sintered samples, was obtained for the as-grown and annealed laser-textured samples, respectively. The maximum power factor obtained at 650 °C in the annealed laser-textured samples (∼0.20 mW/K2 m) is much higher than the best value obtained in sinter–forged textured materials at the same temperature.The authors wish to thank the MINECO-FEDER (Project MAT2013--46505-C3-1-R) and the Gobierno de Aragón and Fondo Social Europeo (Research Groups T12 and T87) for financial support. F.M. Costa and N.M. Ferreira gratefully acknowledge the support from UID/CTM/50025/2013 project.Peer reviewedElsevierEuropean CommissionMinisterio de Economía y Competitividad (España)Gobierno de AragónUniversidade do Minho (Portugal)Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]201520152015info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Preprintinfo:eu-repo/semantics/submittedVersionhttp://hdl.handle.net/10261/121179reponame: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://dx.doi.org/10.1016/j.matdes.2015.03.005Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/1211792026-05-22T06:33:51Z
dc.title.none.fl_str_mv Use of laser technology to produce high thermoelectric performances in Bi2Sr2Co1.8Ox
title Use of laser technology to produce high thermoelectric performances in Bi2Sr2Co1.8Ox
spellingShingle Use of laser technology to produce high thermoelectric performances in Bi2Sr2Co1.8Ox
Rasekh, Sh.
Thermoelectrics
Laser processing
Seebeck coefficient
Electrical resistivity
title_short Use of laser technology to produce high thermoelectric performances in Bi2Sr2Co1.8Ox
title_full Use of laser technology to produce high thermoelectric performances in Bi2Sr2Co1.8Ox
title_fullStr Use of laser technology to produce high thermoelectric performances in Bi2Sr2Co1.8Ox
title_full_unstemmed Use of laser technology to produce high thermoelectric performances in Bi2Sr2Co1.8Ox
title_sort Use of laser technology to produce high thermoelectric performances in Bi2Sr2Co1.8Ox
dc.creator.none.fl_str_mv Rasekh, Sh.
Costa, F. M.
Ferreira, Nuno M.
Torres, M. A.
Madre, M. A.
Diez, J. C.
Sotelo, Andres
author Rasekh, Sh.
author_facet Rasekh, Sh.
Costa, F. M.
Ferreira, Nuno M.
Torres, M. A.
Madre, M. A.
Diez, J. C.
Sotelo, Andres
author_role author
author2 Costa, F. M.
Ferreira, Nuno M.
Torres, M. A.
Madre, M. A.
Diez, J. C.
Sotelo, Andres
author2_role author
author
author
author
author
author
dc.contributor.none.fl_str_mv European Commission
Ministerio de Economía y Competitividad (España)
Gobierno de Aragón
Universidade do Minho (Portugal)
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Thermoelectrics
Laser processing
Seebeck coefficient
Electrical resistivity
topic Thermoelectrics
Laser processing
Seebeck coefficient
Electrical resistivity
description Bi2Sr2Co1.8Ox bulk polycrystalline ceramics were prepared by conventional sintering of powders, obtained by polymer solution method and by directional growth using the laser floating zone technique. Microstructural analysis showed randomly oriented grains in the classical sintered materials, while in the laser-textured samples well oriented crystals with the c-axis nearly perpendicular to the growth direction were observed. A significant reduction on electrical resistivity, compared with the sintered materials, was observed due to the decrease on the secondary phases content. As a consequence, a raise on the power factor of about 2 and 5 times, compared with the classically sintered samples, was obtained for the as-grown and annealed laser-textured samples, respectively. The maximum power factor obtained at 650 °C in the annealed laser-textured samples (∼0.20 mW/K2 m) is much higher than the best value obtained in sinter–forged textured materials at the same temperature.
publishDate 2015
dc.date.none.fl_str_mv 2015
2015
2015
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/10261/121179
url http://hdl.handle.net/10261/121179
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://dx.doi.org/10.1016/j.matdes.2015.03.005
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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