A random AC network model for dispersed ionic conductors

Conductivity and dielectric properties of dispersed ionic conductors are studied theoretically. The authors approach is based on a three-component AC network model, which accounts for the random geometrical distribution of insulating particles in a weakly conducting matrix and a highly conducting interface between both phases. The model is solved by using a position-space renormalisation technique, which they test against transfer-matrix calculations for a binary AC network. The potential of dielectric measurements as a method to study effects of interface percolation in dispersed conductors is pointed out.