Experimental study of boron nitride in a wide temperature interval

In the present work thermal conductivity (λ), thermal diffusivity (a), heat capacity (c_p) and linear thermal expansion coefficient (LTEC, α) of boron nitride (BN) with hexagonal modification were studied in a wide temperature range of 298–1273…1474 K. The experiments were performed on the samples made from the same starting material with a density of 1.64 g/cm³ at room temperature. For all studied properties the approximation equations were obtained and the tables of recommended values were developed that can be used for various scientific and practical applications. (paper)