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Statements

Subject Item
n2:RIV%2F60461373%3A22310%2F14%3A43897127%21RIV15-MSM-22310___
rdf:type
skos:Concept n17:Vysledek
dcterms:description
Highly electrically conductive materials with low heat transfer rates are of very high importance for high temperature fuel cell technologies and the refractory material industry. We aim to develop such materials with high electrical conductivities/high thermal resistivities by creating composite materials of graphene and Al2O3. Here we describe a novel and facile method for the synthesis of Al2O3-graphene composites. Graphite oxide, which was prepared by the Hofmann method, was reduced by active hydrogen generated by the reaction of aluminum with a solution of sodium hydroxide. This reaction led to the formation of a nanocrystalline composite of graphene and aluminum hydroxide. The Al(OH)3-graphene composite was then calcined and pressed into pellets. Sintering of the pellets yielded a nanostructured Al2O3-graphene composite. We characterized the properties of the Al(OH)3-graphene and Al2O3-graphene composite materials in all steps to get an understanding of the process of the nanocomposite formation. The materials were analyzed by XRD, high resolution XPS, Raman spectroscopy, SEM, SEM-EDS, STEM, STA and AFM. The resistivity and thermal conductivity of the final Al2O3-graphene composite were measured. The Al2O3-graphene nanocomposite is a promising conductive material for high-temperature applications Highly electrically conductive materials with low heat transfer rates are of very high importance for high temperature fuel cell technologies and the refractory material industry. We aim to develop such materials with high electrical conductivities/high thermal resistivities by creating composite materials of graphene and Al2O3. Here we describe a novel and facile method for the synthesis of Al2O3-graphene composites. Graphite oxide, which was prepared by the Hofmann method, was reduced by active hydrogen generated by the reaction of aluminum with a solution of sodium hydroxide. This reaction led to the formation of a nanocrystalline composite of graphene and aluminum hydroxide. The Al(OH)3-graphene composite was then calcined and pressed into pellets. Sintering of the pellets yielded a nanostructured Al2O3-graphene composite. We characterized the properties of the Al(OH)3-graphene and Al2O3-graphene composite materials in all steps to get an understanding of the process of the nanocomposite formation. The materials were analyzed by XRD, high resolution XPS, Raman spectroscopy, SEM, SEM-EDS, STEM, STA and AFM. The resistivity and thermal conductivity of the final Al2O3-graphene composite were measured. The Al2O3-graphene nanocomposite is a promising conductive material for high-temperature applications
dcterms:title
Towards highly electrically conductive and thermally insulating graphene nanocomposites: Al2O3-graphene Towards highly electrically conductive and thermally insulating graphene nanocomposites: Al2O3-graphene
skos:prefLabel
Towards highly electrically conductive and thermally insulating graphene nanocomposites: Al2O3-graphene Towards highly electrically conductive and thermally insulating graphene nanocomposites: Al2O3-graphene
skos:notation
RIV/60461373:22310/14:43897127!RIV15-MSM-22310___
n6:aktivita
n16:S
n6:aktivity
S
n6:cisloPeriodika
15
n6:dodaniDat
n12:2015
n6:domaciTvurceVysledku
n8:1924613 n8:3148262 n8:5250226 n8:6541690 n8:6562108
n6:druhVysledku
n13:J
n6:duvernostUdaju
n7:S
n6:entitaPredkladatele
n18:predkladatel
n6:idSjednocenehoVysledku
50829
n6:idVysledku
RIV/60461373:22310/14:43897127
n6:jazykVysledku
n11:eng
n6:klicovaSlova
Al2O3-graphene; nanocomposites; graphene; insulating; thermally; and; conductive; electrically; highly; Towards
n6:klicoveSlovo
n9:Towards n9:and n9:nanocomposites n9:graphene n9:Al2O3-graphene n9:insulating n9:thermally n9:electrically n9:highly n9:conductive
n6:kodStatuVydavatele
GB - Spojené království Velké Británie a Severního Irska
n6:kontrolniKodProRIV
[A449EF6FB58D]
n6:nazevZdroje
RSC Advances
n6:obor
n15:CA
n6:pocetDomacichTvurcuVysledku
5
n6:pocetTvurcuVysledku
6
n6:rokUplatneniVysledku
n12:2014
n6:svazekPeriodika
4
n6:tvurceVysledku
Jankovský, Ondřej Sofer, Zdeněk Pumera, Martin Huber, Štěpán Sedmidubský, David Šimek, Petr
n6:wos
000330241000008
s:issn
2046-2069
s:numberOfPages
7
n10:doi
10.1039/C3RA45069D
n14:organizacniJednotka
22310