Enhanced thermoelectric properties in Bi2Sr2-XBaxCo2Oy ceramics by Ba doping

Bi2Sr2-xBaxCo2Oy polycrystalline samples (0.00 = × =0.15) were prepared through the classical solid-state reaction method. It has been found that Ba-doped Bi2Sr2Co2Oy was obtained as major phase in all samples, based on XRD results. On the other hand, SEM studies have shown the presence of small amo...

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Autores: Özkurt, B., Madre Sediles, M. A., Sotelo Mieg, A., Torres Portero, M. A.
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2022
País:España
Institución:Universidad de Zaragoza
Repositorio:Zaguán. Repositorio Digital de la Universidad de Zaragoza
OAI Identifier:oai:zaguan.unizar.es:127747
Acceso en línea:http://zaguan.unizar.es/record/127747
Access Level:acceso abierto
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spelling Enhanced thermoelectric properties in Bi2Sr2-XBaxCo2Oy ceramics by Ba dopingÖzkurt, B.Madre Sediles, M. A.Sotelo Mieg, A.Torres Portero, M. A.Bi2Sr2-xBaxCo2Oy polycrystalline samples (0.00 = × =0.15) were prepared through the classical solid-state reaction method. It has been found that Ba-doped Bi2Sr2Co2Oy was obtained as major phase in all samples, based on XRD results. On the other hand, SEM studies have shown the presence of small amounts of secondary phases. The electrical resistivity values of all Ba doped samples decreased when compared to the undoped one, being minimum for the 0.075Ba doped ones. Seebeck coefficient increase with the increasing temperature in all samples, reaching the highest values in the 0.025 Ba doped sample. Finally, power factor has been calculated using the Seebeck coefficient and electrical resistivity values to determine the thermoelectric performances of samples. The maximum PF value of 0.14 mW/K2 m at 650 °C was obtained for 0.075Ba doped sample, which is around 25% higher than the undoped sample at the same temperature. All these results clearly show that the thermoelectric properties of the Bi2Sr2Co2Oy system can be improved by Ba doping at optimal values. © 2022 Elsevier B.V.2022info:eu-repo/semantics/articleinfo:eu-repo/semantics/acceptedVersionapplication/pdfhttp://zaguan.unizar.es/record/127747reponame:Zaguán. Repositorio Digital de la Universidad de Zaragozainstname:Universidad de ZaragozaInglésinfo:eu-repo/grantAgreement/ES/DGA-FEDER/T54-20Rinfo:eu-repo/grantAgreement/ES/MINECO-FEDER/MAT2017-82183-C3-1-Rinfo:eu-repo/semantics/openAccessoai:zaguan.unizar.es:1277472026-05-29T13:59:51Z
dc.title.none.fl_str_mv Enhanced thermoelectric properties in Bi2Sr2-XBaxCo2Oy ceramics by Ba doping
title Enhanced thermoelectric properties in Bi2Sr2-XBaxCo2Oy ceramics by Ba doping
spellingShingle Enhanced thermoelectric properties in Bi2Sr2-XBaxCo2Oy ceramics by Ba doping
Özkurt, B.
title_short Enhanced thermoelectric properties in Bi2Sr2-XBaxCo2Oy ceramics by Ba doping
title_full Enhanced thermoelectric properties in Bi2Sr2-XBaxCo2Oy ceramics by Ba doping
title_fullStr Enhanced thermoelectric properties in Bi2Sr2-XBaxCo2Oy ceramics by Ba doping
title_full_unstemmed Enhanced thermoelectric properties in Bi2Sr2-XBaxCo2Oy ceramics by Ba doping
title_sort Enhanced thermoelectric properties in Bi2Sr2-XBaxCo2Oy ceramics by Ba doping
dc.creator.none.fl_str_mv Özkurt, B.
Madre Sediles, M. A.
Sotelo Mieg, A.
Torres Portero, M. A.
author Özkurt, B.
author_facet Özkurt, B.
Madre Sediles, M. A.
Sotelo Mieg, A.
Torres Portero, M. A.
author_role author
author2 Madre Sediles, M. A.
Sotelo Mieg, A.
Torres Portero, M. A.
author2_role author
author
author
description Bi2Sr2-xBaxCo2Oy polycrystalline samples (0.00 = × =0.15) were prepared through the classical solid-state reaction method. It has been found that Ba-doped Bi2Sr2Co2Oy was obtained as major phase in all samples, based on XRD results. On the other hand, SEM studies have shown the presence of small amounts of secondary phases. The electrical resistivity values of all Ba doped samples decreased when compared to the undoped one, being minimum for the 0.075Ba doped ones. Seebeck coefficient increase with the increasing temperature in all samples, reaching the highest values in the 0.025 Ba doped sample. Finally, power factor has been calculated using the Seebeck coefficient and electrical resistivity values to determine the thermoelectric performances of samples. The maximum PF value of 0.14 mW/K2 m at 650 °C was obtained for 0.075Ba doped sample, which is around 25% higher than the undoped sample at the same temperature. All these results clearly show that the thermoelectric properties of the Bi2Sr2Co2Oy system can be improved by Ba doping at optimal values. © 2022 Elsevier B.V.
publishDate 2022
dc.date.none.fl_str_mv 2022
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv http://zaguan.unizar.es/record/127747
url http://zaguan.unizar.es/record/127747
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv info:eu-repo/grantAgreement/ES/DGA-FEDER/T54-20R
info:eu-repo/grantAgreement/ES/MINECO-FEDER/MAT2017-82183-C3-1-R
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
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dc.source.none.fl_str_mv reponame:Zaguán. Repositorio Digital de la Universidad de Zaragoza
instname:Universidad de Zaragoza
instname_str Universidad de Zaragoza
reponame_str Zaguán. Repositorio Digital de la Universidad de Zaragoza
collection Zaguán. Repositorio Digital de la Universidad de Zaragoza
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