Electrical Conductivity of Ceramics Based on Different Boron Nitride Modifications

Abstract

Boron nitride, along with diamond, is one of those rare high-ohmic materials which possesses high heat conductivity. The important peculiarity of boron nitride as compared to carbon is that all its modifications: c-BN — cubic, w-BN — wurtzite and h-BN — hexagonal (graphite-like) — have high resistance in contrast with hexagonal modification of carbongraphite, which is a material with high conductivity[1,2]. The difficulties in obtaining the diamond ceramics are connected in a great measure with possible appearance of graphite on baking of diamond powders under high pressures and temperatures.