Improvement of thermoelectric properties of Ca0.9Gd0.1MnO3 by powder engineering through K2CO3 additions

Oxide materials based on calcium manganite show clear prospects as thermoelectrics, provided by their stability at high temperatures and inherent flexibility in tuning the relevant electrical and thermal transport properties. Donor-doped CaMnO3 is an n-type semiconductor with a perovskite structure...

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Autores: Ferreira, Nuno M., Ferro, M. C., Sarabando, Artur R., Ribeiro, A., Davarpanah, A., Amaral, Vitor S., Madre, M. A., Kovalevsky, A. V., Torres, M. A., Costa, F. M., Sotelo, Andres
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2019
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/181590
Acceso en línea:http://hdl.handle.net/10261/181590
Access Level:acceso abierto
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spelling Improvement of thermoelectric properties of Ca0.9Gd0.1MnO3 by powder engineering through K2CO3 additionsFerreira, Nuno M.Ferro, M. C.Sarabando, Artur R.Ribeiro, A.Davarpanah, A.Amaral, Vitor S.Madre, M. A.Kovalevsky, A. V.Torres, M. A.Costa, F. M.Sotelo, AndresOxide materials based on calcium manganite show clear prospects as thermoelectrics, provided by their stability at high temperatures and inherent flexibility in tuning the relevant electrical and thermal transport properties. Donor-doped CaMnO3 is an n-type semiconductor with a perovskite structure and relatively high thermoelectric performance. In this work, the precursor powders have been modified through potassium carbonate additions to produce Ca0.9Gd0.1MnO3 pellets without the usual delamination problems occurring during the compaction process. In order to demonstrate the relevant effects, several samples with different amounts of potassium carbonate (0–15 wt%) have been prepared. The results showed that potassium additions significantly facilitate the compaction procedure, while also improving the thermoelectric performances. The results also highlight the importance of porosity control for improving ZT, by decreasing the thermal conductivity without reduction of the electrical performance. The highest ZT values were observed for the samples processed at 15 wt% of potassium carbonate addition, exhibiting an improvement at least 30% at 800 °C when compared to the pure samples.N.M. Ferreira, A.V. Kovalevsky and FM Costa acknowledge the support of i3 N (UID/CTM/50025/2013) and CICECO-Aveiro Institute of Materials (UID/CTM/50011/2013), financed by FCT/MEC and FEDER under the PT2020 Partnership Agreement. The support from FCT (Portugal) grant SFRH/BPD/111460/2015, and the funding that allowed a scientific mission to Zaragoza to perform the present work, is also acknowledged. A. Sotelo, M. A. Madre, J. C. Diez, and M. A. Torres acknowledge the Gobierno de Aragon (Grupo de Investigacion T 54-17 R), and the MINECO-FEDER (MAT2017-82183-C3-1-R) for funding.Peer reviewedSpringer NatureAgencia Estatal de Investigación (España)Universidade de AveiroFundação para a Ciência e a Tecnologia (Portugal)Ministério da Educação e Ciência (Portugal)European CommissionGobierno de AragónMinisterio de Ciencia, Innovación y Universidades (España)Ministerio de Economía y Competitividad (España)Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]201920192019info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Postprintinfo:eu-repo/semantics/acceptedVersionhttp://hdl.handle.net/10261/181590reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/MAT2017-82183-C3-1-RMAT2017-82183-C3-1-R/AEI/10.13039/501100011033https://doi.org/10.1007/s10853-018-3058-xSíinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/1815902026-05-22T06:33:51Z
dc.title.none.fl_str_mv Improvement of thermoelectric properties of Ca0.9Gd0.1MnO3 by powder engineering through K2CO3 additions
title Improvement of thermoelectric properties of Ca0.9Gd0.1MnO3 by powder engineering through K2CO3 additions
spellingShingle Improvement of thermoelectric properties of Ca0.9Gd0.1MnO3 by powder engineering through K2CO3 additions
Ferreira, Nuno M.
title_short Improvement of thermoelectric properties of Ca0.9Gd0.1MnO3 by powder engineering through K2CO3 additions
title_full Improvement of thermoelectric properties of Ca0.9Gd0.1MnO3 by powder engineering through K2CO3 additions
title_fullStr Improvement of thermoelectric properties of Ca0.9Gd0.1MnO3 by powder engineering through K2CO3 additions
title_full_unstemmed Improvement of thermoelectric properties of Ca0.9Gd0.1MnO3 by powder engineering through K2CO3 additions
title_sort Improvement of thermoelectric properties of Ca0.9Gd0.1MnO3 by powder engineering through K2CO3 additions
dc.creator.none.fl_str_mv Ferreira, Nuno M.
Ferro, M. C.
Sarabando, Artur R.
Ribeiro, A.
Davarpanah, A.
Amaral, Vitor S.
Madre, M. A.
Kovalevsky, A. V.
Torres, M. A.
Costa, F. M.
Sotelo, Andres
author Ferreira, Nuno M.
author_facet Ferreira, Nuno M.
Ferro, M. C.
Sarabando, Artur R.
Ribeiro, A.
Davarpanah, A.
Amaral, Vitor S.
Madre, M. A.
Kovalevsky, A. V.
Torres, M. A.
Costa, F. M.
Sotelo, Andres
author_role author
author2 Ferro, M. C.
Sarabando, Artur R.
Ribeiro, A.
Davarpanah, A.
Amaral, Vitor S.
Madre, M. A.
Kovalevsky, A. V.
Torres, M. A.
Costa, F. M.
Sotelo, Andres
author2_role author
author
author
author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv Agencia Estatal de Investigación (España)
Universidade de Aveiro
Fundação para a Ciência e a Tecnologia (Portugal)
Ministério da Educação e Ciência (Portugal)
European Commission
Gobierno de Aragón
Ministerio de Ciencia, Innovación y Universidades (España)
Ministerio de Economía y Competitividad (España)
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
description Oxide materials based on calcium manganite show clear prospects as thermoelectrics, provided by their stability at high temperatures and inherent flexibility in tuning the relevant electrical and thermal transport properties. Donor-doped CaMnO3 is an n-type semiconductor with a perovskite structure and relatively high thermoelectric performance. In this work, the precursor powders have been modified through potassium carbonate additions to produce Ca0.9Gd0.1MnO3 pellets without the usual delamination problems occurring during the compaction process. In order to demonstrate the relevant effects, several samples with different amounts of potassium carbonate (0–15 wt%) have been prepared. The results showed that potassium additions significantly facilitate the compaction procedure, while also improving the thermoelectric performances. The results also highlight the importance of porosity control for improving ZT, by decreasing the thermal conductivity without reduction of the electrical performance. The highest ZT values were observed for the samples processed at 15 wt% of potassium carbonate addition, exhibiting an improvement at least 30% at 800 °C when compared to the pure samples.
publishDate 2019
dc.date.none.fl_str_mv 2019
2019
2019
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Postprint
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/181590
url http://hdl.handle.net/10261/181590
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv #PLACEHOLDER_PARENT_METADATA_VALUE#
#PLACEHOLDER_PARENT_METADATA_VALUE#
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/MAT2017-82183-C3-1-R
MAT2017-82183-C3-1-R/AEI/10.13039/501100011033
https://doi.org/10.1007/s10853-018-3058-x
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Springer Nature
publisher.none.fl_str_mv Springer Nature
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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