About: Dielectric properties of carbon nanofibre/alumina composites

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	Carbon nanofibre (CNF)/Al2O3 composites with concentrations between 1 and 9 vol.% of CNF were prepared by the traditional ceramic processing route followed by spark plasma sintering. The dielectric properties of these composites have been studied in a broad frequency range from mHz to the infrared range. Unlike conventional composites, the percolation threshold in this system is more complex depending on the particles topology. Positive and negative variations by several orders of magnitude in the low frequency ac conductivity have been detected for concentrations near the threshold at 2 vol.% of CNF. To explain these results, a modified percolation model has been proposed which takes into consideration the effect of the concentration of the filler on the microstructure of the composite. Carbon nanofibre (CNF)/Al2O3 composites with concentrations between 1 and 9 vol.% of CNF were prepared by the traditional ceramic processing route followed by spark plasma sintering. The dielectric properties of these composites have been studied in a broad frequency range from mHz to the infrared range. Unlike conventional composites, the percolation threshold in this system is more complex depending on the particles topology. Positive and negative variations by several orders of magnitude in the low frequency ac conductivity have been detected for concentrations near the threshold at 2 vol.% of CNF. To explain these results, a modified percolation model has been proposed which takes into consideration the effect of the concentration of the filler on the microstructure of the composite. (en)
Title	Dielectric properties of carbon nanofibre/alumina composites Dielectric properties of carbon nanofibre/alumina composites (en)
skos:prefLabel	Dielectric properties of carbon nanofibre/alumina composites Dielectric properties of carbon nanofibre/alumina composites (en)
skos:notation	RIV/68378271:_____/13:00396177!RIV14-MSM-68378271
http://linked.open...avai/riv/aktivita	I P
http://linked.open...avai/riv/aktivity	I, P(GAP204/12/0232), P(LD12025)
http://linked.open...iv/cisloPeriodika	JUN
http://linked.open...vai/riv/dodaniDat	2014
http://linked.open...aciTvurceVysledku	Petzelt, Jan Kempa, Martin Nuzhnyy, Dmitry Savinov, Maxim Bovtun, Viktor
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Fyzikální ústav AV ČR, v. v. i.
http://linked.open...dnocenehoVysledku	69555
http://linked.open...ai/riv/idVysledku	RIV/68378271:_____/13:00396177
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	alumina; carbon nanofibre; dielectric and THz spectroscopy; infrared spectroscopy; percolation threshold (en)
http://linked.open.../riv/klicoveSlovo	infrared spectroscopy carbon nanofibre dielectric and THz spectroscopy percolation threshold alumina
http://linked.open...odStatuVydavatele	US - Spojené státy americké
http://linked.open...ontrolniKodProRIV	[34EF9595F7CE]
http://linked.open...i/riv/nazevZdroje	Carbon
http://linked.open...in/vavai/riv/obor	BM
http://linked.open...ichTvurcuVysledku	5 (xsd:int)
http://linked.open...cetTvurcuVysledku	9 (xsd:int)
http://linked.open...vavai/riv/projekt	Dielectric and phonon spectroscopy of nanocomposite dielectrics and conductors Functional nanocomposites and their broadband dielectric and AC conductivity properties
http://linked.open...UplatneniVysledku	2013
http://linked.open...v/svazekPeriodika	57
http://linked.open...iv/tvurceVysledku	Bovtun, Viktor Kempa, Martin Nuzhnyy, Dmitry Petzelt, Jan Savinov, Maxim Fernandez-Garcia, L. Menéndez, J. L. Pecharromán, C. Suarez, M.
http://linked.open...ain/vavai/riv/wos	000319030000043
issn	0008-6223
number of pages	8 (xsd:int)
http://bibframe.org/vocab/doi	10.1016/j.carbon.2013.01.086

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