Many materials used in our daily life are composites, which are often made up of at least two constituents or phases. This book investigates all possibility techniques have been designed for composite dielectric materials and optimum technique for obtaining the best electrical properties of dielectric mixtures under low and high frequencies and studies the effects of high frequencies on variant electrical properties of dielectric mixtures. New mathematical models of a breakdown channel configuration have been studied in solid dielectrics. This book introduces the preferred designed patterns of composite materials for electrical applications with respect to type of industrial application.