Heat-Conducting Properties of High-Temperature Materials Based on Graphite Foam

Abstract

The laser flash method is used to determine the temperature dependences of the thermal conductivity of graphite foams that differ in the defectiveness of their graphite matrix. It is shown that the heat capacity of the materials which were obtained is independent of the method used to make them. The thermal conductivity of specimens of graphite foam obtained at 1000°C decreases with an increase in temperature, while that of specimens of graphite foam obtained at 400°C remains nearly constant. The thermal conductivity 0.46 W/(m·K) that was achieved is comparable to the thermal conductivity of graphite felt.