The hard graphite felt is a composite which choose the PAN-based graphite felt as mixture material. The felt is achieved by carbonization and graphitization process with the special binding agent, after its primary graphitizing at over 2000℃. It has the good rigidity and self-support, less dense, no short fiber shedding, low thermal conductivity coefficient and can work under the temperature of 3200℃. It applies to a various of furnace such as high-pressure gas quenching furnace, pressure sintering furnace, poly-crystal casting furnace, single-crystal grown furnace (sapphire grown furnace) etc., especially for the high temperature furnace with strict requirement by atmosphere due to its most important character of supper purity (<200ppm) and extremely high temperature resistant. And it can shape to be plate, disc, cylindrical etc. with long working life and convenient installation and removal.

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  Hard graphite felt