Effect of carbon black content on the effective dielectric constant of ethylene vinyl acetate matrix composites

A sharp increase in the effective permittivity of composites with an ethylene vinyl acetate matrix at concentrations of carbon black corresponding to the percolation region was established, as well as the presence of a maximum of dielectric losses at a concentration when the dominant contribution to conductivity is due to field emission. A correlation was revealed between the dependences of the effective permittivity and conductivity on the content of carbon black. A contactless technique is presented that allows determining the permittivity of semiconducting materials using the capacitor method.