Unravelling the optimization of few-layer graphene crystallinity and electrical conductivity in ceramic composites by Raman spectroscopy

Zirconia composites with few-layer graphene (FLG) were prepared by two powder processing routines -ultrasonic agitation or planetary ball milling- and spark plasma sintered at 1250 and 1300 °C. An in-depth study of the crystallinity of FLG, in terms of presence and nature of defects, was performed b...

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Autores: Muñoz Ferreiro, Carmen, López Pernía, Cristina, Gallardo López, Ángela María, Poyato Galán, Rosalía
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2021
País:España
Institución:Universidad de Sevilla (US)
Repositorio:idUS. Depósito de Investigación de la Universidad de Sevilla
OAI Identifier:oai:idus.us.es:11441/137979
Acceso en línea:https://hdl.handle.net/11441/137979
https://doi.org/10.1016/j.jeurceramsoc.2021.09.025
Access Level:acceso abierto
Palabra clave:Composites
Crystallinity
Electrical conductivity
Few-layer graphene
Raman spectroscopy
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spelling Unravelling the optimization of few-layer graphene crystallinity and electrical conductivity in ceramic composites by Raman spectroscopyMuñoz Ferreiro, CarmenLópez Pernía, CristinaGallardo López, Ángela MaríaPoyato Galán, RosalíaCompositesCrystallinityElectrical conductivityFew-layer grapheneRaman spectroscopyZirconia composites with few-layer graphene (FLG) were prepared by two powder processing routines -ultrasonic agitation or planetary ball milling- and spark plasma sintered at 1250 and 1300 °C. An in-depth study of the crystallinity of FLG, in terms of presence and nature of defects, was performed by Raman spectroscopy, revealing enhanced FLG crystallinity after sintering. This enhancement was more noticeable in the composites sintered at the highest temperature, with lower amount of structural defects and amorphous carbon. However, remaining amorphous carbon was detected in the composites prepared by planetary ball milling even after sintering at the highest temperature, resulting in lower electrical conductivities. Optimum results in terms of electrical conductivity were achieved for the composites prepared by ultrasonic agitation and sintered at 1300 °C, with electrical percolation limit below 2.5 vol% FLG and high electrical conductivity (678 S/m for 5 vol% FLG), as result of the enhanced FLG crystallinity after sintering.Ministerio de Ciencia, Innovación y Universidades PGC 2018- 101377-B-100Ministerio de Asuntos Económicos y Transformación Digital BES-2016- 078711Universidad de Sevilla USE-18740-HElsevierFísica de la Materia CondensadaMinisterio de Ciencia, Innovación y Universidades (MICINN). EspañaMinisterio de Asuntos Económicos y Transformación Digital (MINECO). EspañaUniversidad de Sevilla2021info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfapplication/pdfhttps://hdl.handle.net/11441/137979https://doi.org/10.1016/j.jeurceramsoc.2021.09.025reponame:idUS. Depósito de Investigación de la Universidad de Sevillainstname:Universidad de Sevilla (US)InglésJournal of the European Ceramic Society, 41 (16), 290-298.PGC 2018- 101377-B-100BES-2016- 078711USE-18740-Hhttp://doi.org/10.1016/j.jeurceramsoc.2021.09.025info:eu-repo/semantics/openAccessoai:idus.us.es:11441/1379792026-06-17T12:51:07Z
dc.title.none.fl_str_mv Unravelling the optimization of few-layer graphene crystallinity and electrical conductivity in ceramic composites by Raman spectroscopy
title Unravelling the optimization of few-layer graphene crystallinity and electrical conductivity in ceramic composites by Raman spectroscopy
spellingShingle Unravelling the optimization of few-layer graphene crystallinity and electrical conductivity in ceramic composites by Raman spectroscopy
Muñoz Ferreiro, Carmen
Composites
Crystallinity
Electrical conductivity
Few-layer graphene
Raman spectroscopy
title_short Unravelling the optimization of few-layer graphene crystallinity and electrical conductivity in ceramic composites by Raman spectroscopy
title_full Unravelling the optimization of few-layer graphene crystallinity and electrical conductivity in ceramic composites by Raman spectroscopy
title_fullStr Unravelling the optimization of few-layer graphene crystallinity and electrical conductivity in ceramic composites by Raman spectroscopy
title_full_unstemmed Unravelling the optimization of few-layer graphene crystallinity and electrical conductivity in ceramic composites by Raman spectroscopy
title_sort Unravelling the optimization of few-layer graphene crystallinity and electrical conductivity in ceramic composites by Raman spectroscopy
dc.creator.none.fl_str_mv Muñoz Ferreiro, Carmen
López Pernía, Cristina
Gallardo López, Ángela María
Poyato Galán, Rosalía
author Muñoz Ferreiro, Carmen
author_facet Muñoz Ferreiro, Carmen
López Pernía, Cristina
Gallardo López, Ángela María
Poyato Galán, Rosalía
author_role author
author2 López Pernía, Cristina
Gallardo López, Ángela María
Poyato Galán, Rosalía
author2_role author
author
author
dc.contributor.none.fl_str_mv Física de la Materia Condensada
Ministerio de Ciencia, Innovación y Universidades (MICINN). España
Ministerio de Asuntos Económicos y Transformación Digital (MINECO). España
Universidad de Sevilla
dc.subject.none.fl_str_mv Composites
Crystallinity
Electrical conductivity
Few-layer graphene
Raman spectroscopy
topic Composites
Crystallinity
Electrical conductivity
Few-layer graphene
Raman spectroscopy
description Zirconia composites with few-layer graphene (FLG) were prepared by two powder processing routines -ultrasonic agitation or planetary ball milling- and spark plasma sintered at 1250 and 1300 °C. An in-depth study of the crystallinity of FLG, in terms of presence and nature of defects, was performed by Raman spectroscopy, revealing enhanced FLG crystallinity after sintering. This enhancement was more noticeable in the composites sintered at the highest temperature, with lower amount of structural defects and amorphous carbon. However, remaining amorphous carbon was detected in the composites prepared by planetary ball milling even after sintering at the highest temperature, resulting in lower electrical conductivities. Optimum results in terms of electrical conductivity were achieved for the composites prepared by ultrasonic agitation and sintered at 1300 °C, with electrical percolation limit below 2.5 vol% FLG and high electrical conductivity (678 S/m for 5 vol% FLG), as result of the enhanced FLG crystallinity after sintering.
publishDate 2021
dc.date.none.fl_str_mv 2021
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/11441/137979
https://doi.org/10.1016/j.jeurceramsoc.2021.09.025
url https://hdl.handle.net/11441/137979
https://doi.org/10.1016/j.jeurceramsoc.2021.09.025
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Journal of the European Ceramic Society, 41 (16), 290-298.
PGC 2018- 101377-B-100
BES-2016- 078711
USE-18740-H
http://doi.org/10.1016/j.jeurceramsoc.2021.09.025
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:idUS. Depósito de Investigación de la Universidad de Sevilla
instname:Universidad de Sevilla (US)
instname_str Universidad de Sevilla (US)
reponame_str idUS. Depósito de Investigación de la Universidad de Sevilla
collection idUS. Depósito de Investigación de la Universidad de Sevilla
repository.name.fl_str_mv
repository.mail.fl_str_mv
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