Significant reduction in processing time for Ca0.95Ce0.05MnO3 thermoelectric ceramics

Attrition-milling process has been applied to Ce-doped CaMnO3 precursors to obtain small grain-size powders. The use of Ce4+ as dopant instead a Rare Earth3+ has allowed decreasing by 50% the atomic proportion of dopant, to obtain equivalent charge carrier concentration, which is required for attain...

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Autores: Sotelo, Andres, Amirkhizi, Parisa, Dura, Oscar J., García, Gustavo, Asensio, A. C., Torres, M. A., Madre, M. A., Kovalevsky, Andrei V., Rasekh, Shahed
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2023
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/344465
Acceso en línea:http://hdl.handle.net/10261/344465
Access Level:acceso abierto
Palabra clave:Milling
Electrical conductivity
Thermal conductivity
Transition metal oxides
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spelling Significant reduction in processing time for Ca0.95Ce0.05MnO3 thermoelectric ceramicsSotelo, AndresAmirkhizi, ParisaDura, Oscar J.García, GustavoAsensio, A. C.Torres, M. A.Madre, M. A.Kovalevsky, Andrei V.Rasekh, ShahedMillingElectrical conductivityThermal conductivityTransition metal oxidesAttrition-milling process has been applied to Ce-doped CaMnO3 precursors to obtain small grain-size powders. The use of Ce4+ as dopant instead a Rare Earth3+ has allowed decreasing by 50% the atomic proportion of dopant, to obtain equivalent charge carrier concentration, which is required for attaining promising properties for thermoelectric applications. An impressive decrease in thermal processing time was achieved, together with an increase in thermoelectric performances, when compared to classically prepared materials. XRD and SEM analysis have confirmed that the final material is nearly single phase. Moreover, grain sizes and density increase with the sintering duration. These microstructural differences are reflected in a significant decrease in electrical resistivity, when compared to the samples prepared from ball-milled precursors (used as reference), without drastically modifying the Seebeck coefficient values. On the other hand, despite of their high electrical conductivity, thermal conductivity is decreased for short time sintered materials, leading to the highest ZT values at 800 °C (∼0.27) in samples sintered for 1 h at 1310 °C. These values are among the best reported in the literature, but they have been obtained in very short time using a simple, and easily scalable process. The suggested approach presented in this work appears particularly promising for large-scale production of oxide-based thermoelectric modules for power generation.The authors wish to thank the Gobierno de Aragón (Grupo de Investigacion T54_23R) and Universidad de Zaragoza (UZ2022-IAR-09) for financial support. G. García and A. C. Asensio acknowledge the Basque Government Industry Department through the Elkartek program (Exp: KK-2022/00040 - DIFERENTE). Sh. Rasekh acknowledges the support of the Research Employment Contract FCT–CEECIND/02608/2017. This work was also developed within the scope of the PhD project of P. Amirkhizi (grant 2020.08051. BD funded by FCT) and the project CICECO-Aveiro Institute of Materials, UIDB/50011/2020, UIDP/50011/2020 & LA/P/0006/2020, financed by national funds through the FCT/MCTES (PIDDAC). Authors would like to acknowledge the use of Servicio General de Apoyo a la Investigación-SAI, Universidad de Zaragoza.Peer reviewedElsevierGobierno de AragónUniversidad de ZaragozaEusko JaurlaritzaMinistério da Ciência, Tecnologia e Ensino Superior (Portugal)Fundação para a Ciência e a Tecnologia (Portugal)Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202420242023info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionapplication/pdfhttp://hdl.handle.net/10261/344465reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttps://doi.org/10.1016/j.ceramint.2023.09.107Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/3444652026-05-22T06:33:51Z
dc.title.none.fl_str_mv Significant reduction in processing time for Ca0.95Ce0.05MnO3 thermoelectric ceramics
title Significant reduction in processing time for Ca0.95Ce0.05MnO3 thermoelectric ceramics
spellingShingle Significant reduction in processing time for Ca0.95Ce0.05MnO3 thermoelectric ceramics
Sotelo, Andres
Milling
Electrical conductivity
Thermal conductivity
Transition metal oxides
title_short Significant reduction in processing time for Ca0.95Ce0.05MnO3 thermoelectric ceramics
title_full Significant reduction in processing time for Ca0.95Ce0.05MnO3 thermoelectric ceramics
title_fullStr Significant reduction in processing time for Ca0.95Ce0.05MnO3 thermoelectric ceramics
title_full_unstemmed Significant reduction in processing time for Ca0.95Ce0.05MnO3 thermoelectric ceramics
title_sort Significant reduction in processing time for Ca0.95Ce0.05MnO3 thermoelectric ceramics
dc.creator.none.fl_str_mv Sotelo, Andres
Amirkhizi, Parisa
Dura, Oscar J.
García, Gustavo
Asensio, A. C.
Torres, M. A.
Madre, M. A.
Kovalevsky, Andrei V.
Rasekh, Shahed
author Sotelo, Andres
author_facet Sotelo, Andres
Amirkhizi, Parisa
Dura, Oscar J.
García, Gustavo
Asensio, A. C.
Torres, M. A.
Madre, M. A.
Kovalevsky, Andrei V.
Rasekh, Shahed
author_role author
author2 Amirkhizi, Parisa
Dura, Oscar J.
García, Gustavo
Asensio, A. C.
Torres, M. A.
Madre, M. A.
Kovalevsky, Andrei V.
Rasekh, Shahed
author2_role author
author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv Gobierno de Aragón
Universidad de Zaragoza
Eusko Jaurlaritza
Ministério da Ciência, Tecnologia e Ensino Superior (Portugal)
Fundação para a Ciência e a Tecnologia (Portugal)
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Milling
Electrical conductivity
Thermal conductivity
Transition metal oxides
topic Milling
Electrical conductivity
Thermal conductivity
Transition metal oxides
description Attrition-milling process has been applied to Ce-doped CaMnO3 precursors to obtain small grain-size powders. The use of Ce4+ as dopant instead a Rare Earth3+ has allowed decreasing by 50% the atomic proportion of dopant, to obtain equivalent charge carrier concentration, which is required for attaining promising properties for thermoelectric applications. An impressive decrease in thermal processing time was achieved, together with an increase in thermoelectric performances, when compared to classically prepared materials. XRD and SEM analysis have confirmed that the final material is nearly single phase. Moreover, grain sizes and density increase with the sintering duration. These microstructural differences are reflected in a significant decrease in electrical resistivity, when compared to the samples prepared from ball-milled precursors (used as reference), without drastically modifying the Seebeck coefficient values. On the other hand, despite of their high electrical conductivity, thermal conductivity is decreased for short time sintered materials, leading to the highest ZT values at 800 °C (∼0.27) in samples sintered for 1 h at 1310 °C. These values are among the best reported in the literature, but they have been obtained in very short time using a simple, and easily scalable process. The suggested approach presented in this work appears particularly promising for large-scale production of oxide-based thermoelectric modules for power generation.
publishDate 2023
dc.date.none.fl_str_mv 2023
2024
2024
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/10261/344465
url http://hdl.handle.net/10261/344465
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv https://doi.org/10.1016/j.ceramint.2023.09.107
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
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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