Effect of microstructure on the oxidation resistance of porous carbon materials in air

The oxidation resistance of porous carbon materials in air was studied by t hermal analysis. The effects that the size, ordering, and orientation of ca rbon microcrystallites and the curvature of the surface of primary particle s have on the temperatures of oxidation onset and peak weight loss were exa mined. The extent and orientation of surface graphite-like layers were show n to have a crucial effect on the oxidation resistance of porous carbon mat erials, which may remain stable to oxidation up to 700 degrees C, the oxida tion temperature of graphite.