Electrical conduction mechanisms in graphene nanoplatelet/yttria tetragonal zirconia composites

Yttria tetragonal zirconia polycrystalline (3YTZP) ceramic composites with 5, 10 and 20 vol% graphene nanoplatelets (GNPs) were prepared by spark plasma sintering (SPS) and their electrical conductivity as a function of temperature was characterized. The composites exhibit anisotropic microstructure...

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Autores: Poyato, Rosalía, Osuna, Francisco J., Morales-Rodríguez, A., Gallardo-López, Ángela
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2018
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/193190
Acceso en línea:http://hdl.handle.net/10261/193190
Access Level:acceso abierto
Palabra clave:Electrical
Graphene nanoplatelets
Ceramic composites
Conductivity
Conduction mechanisms
3YTZP
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spelling Electrical conduction mechanisms in graphene nanoplatelet/yttria tetragonal zirconia compositesPoyato, RosalíaOsuna, Francisco J.Morales-Rodríguez, A.Gallardo-López, ÁngelaElectricalGraphene nanoplateletsCeramic compositesConductivityConduction mechanisms3YTZPYttria tetragonal zirconia polycrystalline (3YTZP) ceramic composites with 5, 10 and 20 vol% graphene nanoplatelets (GNPs) were prepared by spark plasma sintering (SPS) and their electrical conductivity as a function of temperature was characterized. The composites exhibit anisotropic microstructures so the electrical conductivity studies were carried out in two directions: perpendicular (σ) and parallel (σ) to the SPS pressing axis. The composites with 5 and 10 GNP vol% showed high electrical anisotropy, whereas the composite with 20 GNP vol% exhibited nearly isotropic electrical behavior. σ shows metallic-type behavior in the composites with 10 and 20 vol% GNP revealing that charge transport takes place through defect-free GNPs. For the composite with 5 vol% GNP the observed semiconductor-type behavior was explained by a two dimensional variable range hopping mechanism. σ shows metallic-type conductivity in the composite with 20 GNP vol% and positive dσ/dT slope in the composites with 5 and 10 GNP vol%.The authors acknowledge the financial support provided by the Spanish Ministerio de Economía y Competitividad, under Project MAT2015-67889-P, cofunded by European FEDER funding.Peer reviewedElsevierMinisterio de Economía y Competitividad (España)European CommissionConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]2019201920182019info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Postprintinfo:eu-repo/semantics/acceptedVersionapplication/pdfhttp://hdl.handle.net/10261/193190reponame: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/MAT2015-67889-Phttps://doi.org/10.1016/j.ceramint.2018.05.082Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/1931902026-05-22T06:33:51Z
dc.title.none.fl_str_mv Electrical conduction mechanisms in graphene nanoplatelet/yttria tetragonal zirconia composites
title Electrical conduction mechanisms in graphene nanoplatelet/yttria tetragonal zirconia composites
spellingShingle Electrical conduction mechanisms in graphene nanoplatelet/yttria tetragonal zirconia composites
Poyato, Rosalía
Electrical
Graphene nanoplatelets
Ceramic composites
Conductivity
Conduction mechanisms
3YTZP
title_short Electrical conduction mechanisms in graphene nanoplatelet/yttria tetragonal zirconia composites
title_full Electrical conduction mechanisms in graphene nanoplatelet/yttria tetragonal zirconia composites
title_fullStr Electrical conduction mechanisms in graphene nanoplatelet/yttria tetragonal zirconia composites
title_full_unstemmed Electrical conduction mechanisms in graphene nanoplatelet/yttria tetragonal zirconia composites
title_sort Electrical conduction mechanisms in graphene nanoplatelet/yttria tetragonal zirconia composites
dc.creator.none.fl_str_mv Poyato, Rosalía
Osuna, Francisco J.
Morales-Rodríguez, A.
Gallardo-López, Ángela
author Poyato, Rosalía
author_facet Poyato, Rosalía
Osuna, Francisco J.
Morales-Rodríguez, A.
Gallardo-López, Ángela
author_role author
author2 Osuna, Francisco J.
Morales-Rodríguez, A.
Gallardo-López, Ángela
author2_role author
author
author
dc.contributor.none.fl_str_mv Ministerio de Economía y Competitividad (España)
European Commission
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Electrical
Graphene nanoplatelets
Ceramic composites
Conductivity
Conduction mechanisms
3YTZP
topic Electrical
Graphene nanoplatelets
Ceramic composites
Conductivity
Conduction mechanisms
3YTZP
description Yttria tetragonal zirconia polycrystalline (3YTZP) ceramic composites with 5, 10 and 20 vol% graphene nanoplatelets (GNPs) were prepared by spark plasma sintering (SPS) and their electrical conductivity as a function of temperature was characterized. The composites exhibit anisotropic microstructures so the electrical conductivity studies were carried out in two directions: perpendicular (σ) and parallel (σ) to the SPS pressing axis. The composites with 5 and 10 GNP vol% showed high electrical anisotropy, whereas the composite with 20 GNP vol% exhibited nearly isotropic electrical behavior. σ shows metallic-type behavior in the composites with 10 and 20 vol% GNP revealing that charge transport takes place through defect-free GNPs. For the composite with 5 vol% GNP the observed semiconductor-type behavior was explained by a two dimensional variable range hopping mechanism. σ shows metallic-type conductivity in the composite with 20 GNP vol% and positive dσ/dT slope in the composites with 5 and 10 GNP vol%.
publishDate 2018
dc.date.none.fl_str_mv 2018
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/10261/193190
url http://hdl.handle.net/10261/193190
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/MAT2015-67889-P
https://doi.org/10.1016/j.ceramint.2018.05.082
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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