Manufacture of porous carbon plate consisting of high density layer and low density layer

Abstract

Abstract PURPOSE:To obtain a porous carbon plate consisting of a high density layer and a low density layer by stacking prepreg pieces in a semi-hardened state so as to form the high density layer, then stacking prepreg pieces over the high density layer before they are pressed at a pressure lower than that used in forming the high density layer so as to form a unified body consisting of the high density layer and a low density layer, being followed by carbonizing the resin. CONSTITUTION:A prepreg piece is formed by using carbon paper or a carbon mat impregnated with a resin. After a require number of prepreg pieces are stacked according to the desired apparent density of a porous carbon plate, areas 1 with a high apparent density are pressed and heated so as to be converted into a semi-hardened state. Next, prepreg pieces constituting an area 2 having a low apparent density are stacked over the semi-hardened areas 1, then the thus obtained body is heated and hardened at a pressure equal to or below the pressure used in forming the high density areas 1 to form a laminate plate. Lastly, the resin of the laminate plate consisting of the high density and the low density layers is heated and corbonized, thereby obtaining a porous carbon plate consisting of a high density layer and a low density layer.

Inventors

• 👤 Tamotsu Koshiishi
• 👤 興石　保

Bibliographic Details