Dielectric constant of quasi-critical percolation systems

Abstract

A way of obtaining binary composite materials having some properties of the critical percolation system is considered. These materials can be obtained by high-density current action on an initially well conducting mixture. This action destroys part of the contacts between adjacent conducting granules, bringing the system to the quasi-critical state. It is shown that quasi-critical systems may have high values of dielectric constant epsilon approximately=10²-10⁶ in the frequency range 010 Hz. The formation and dielectric properties of the systems are studied both by computer simulation and experimentally.