Temperature Dependence of the Thermal Conductivity of Type IIA Diamond Crystals

摘要

Thermal diffusivities of Type IIA diamond crystals of two isotopic compositionsare measured as a function of temperature between 255K and 390K. The results show that the isotopically enriched (0.1% 13C) sample is consistently higher (approximately 50%) than the natural abundance sample. The temperature dependence of the thermal conductivities of both samples follow an empirical power law (T-1.55) which has previously been reported in the literature for adamant materials.