| 摘要 |
PURPOSE:To obtain thin carbon plates for separator excellent in gas impermeability, electric conductivity and mechanical strength without generating cracking and the like by combining phenol fiber, obtained such that novolak type phenol resin is spun and subjected to hardening process, with thermohardening resin and graphite powder. CONSTITUTION:Phenol fiber, obtained such that novolak type phenol resin is spun and subjected to hardening process, is combined with thermohardening resin and graphite powder. It is used as said phenol resin that is obtained by fusing and spinning phenol resin composed of phenol and formaldehyde by using acid catalyst, and subjecting same to hardening process at a temperature of 100 deg.C-150 deg.C. In case of felt or cloth type of said phenol resin, it is laminated and formed into a plate shape to have a desired thickness after being dipped in a solution where graphite powder and phenol resin powder are mixed, and dried. While in case of fiber type, it is formed into a plate shape after being mixed with phenol resin powder evenly. Next, said plate shape molding is completely hardened and thereafter heated to 1,000 deg.C to be carbonized so that thin carbon plates 1, 1' for fuel cell separator may be obtained. |
