Please use this identifier to cite or link to this item: http://localhost:8080/xmlui/handle/123456789/2086
Title: Effect of interparticle distance and interfacial area on the properties of insulator –conductor composites
Authors: Deepa, K S
Sebastian, M T
James, J
Issue Date: 12-Nov-2007
Citation: Applied Physics Letters 91(20):202904 (1-3);12 Nov 2007
Abstract: The influence of conducting phase characteristics on dielectric properties of insulator-conductor composites was demonstrated by studying composites of polytetrafluoroethylene and different volume fractions ofLa0.5Sr0.5CoO3-y (LSCO). LSCO was prepared as coarse grained powder by solid state reaction and as fine powder by citrate gel method. The composites with fine powderof LSCO showed a rapid increase in dielectric constant and conductivity at 30%, while the corresponding value for coarse powder was 50%. The oeercikative behavior was found when the interparticle distance reduced to ~250 nm in both cases. The permitivity and conductivity of the composites were found to increase with the interfacial area.
Appears in Collections:2007

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