THERMAL-CONDUCTIVITY OF HARD CARBON PREPARED FROM C-60 FULLERENE

We report measurements of thermal conductivity in 30-350 K range of ha rd fullerene-based carbon. The material has been prepared from C-60 fu llerene under pressure and has an unusual combination of large hardnes s and relatively high electrical conductivity. Its thermal conductivit y is about 5.5 W/mk at room temperature and decreases almost linearly in the investigated temperature range, The data obtained bear resembla nce to the thermal properties of amorphous materials. It is consistent with the structural investigation that allows one to suggest the exis tence of short-range crystalline order in this transformed substance.