Electrical Properties of Posistor Composite Materials Based on Polyethylene‐Graphite
Multidiscipline Modeling in Materials and Structures
ISSN: 1573-6105
Article publication date: 1 April 2006
Abstract
In this article the electric properties of conducting polymeric compounds with graphite filler was studied to obtain the information of its structural distinctions. It was defined, that the temperature dependences of the electrical resistivity of the investigated composite materials, which had different content of conductive filler, had the posistor properties. Their frequency dependences of dielectric permittivity were found dispersed at low‐frequency area. This phenomenon was explained based on the availability of “built‐in” charges at the boundary region to the particles of graphite of polymeric layer. It was determined by outflow of free charge carries from graphite to localized states in the polymeric matrix. The estimated thickness of “built‐in” charge, in the context of the model of concentric system of conductive particles in dielectric matrix is about a micron.
Keywords
Citation
Degtyar’ov, A.V., Tonkoshkur, A.S. and Lyashkov, A.Y. (2006), "Electrical Properties of Posistor Composite Materials Based on Polyethylene‐Graphite", Multidiscipline Modeling in Materials and Structures, Vol. 2 No. 4, pp. 435-441. https://doi.org/10.1163/157361106778554897
Publisher
:Emerald Group Publishing Limited
Copyright © 2006, Emerald Group Publishing Limited