The electrical resistivity of boron nitride over the temperature range 700 degrees C to 1400 degrees C

The electrical resistivity of pure hexagonal boron nitride in the c direction was measured from 700 degrees C to 1400 degrees C. Special attention was paid to allowance for electrical leakage of the measurement rig. The logarithm of the resistivity increased linearly with the reciprocal of absolute temperature, suggesting that conduction was intrinsic in the temperature range considered. A gap width of 7.1+or-0.1 eV between valence and conduction bands was deduced.