| 摘要 |
PURPOSE:To efficiently obtain a vetreous carbon material free from structural defect by alternately depositing specified porous sheets and half-cured molded plates of a thermosetting resin which acts as the precursor of vitreous carbon, hot pressing the laminated body and then calcining. CONSTITUTION:A thermosetting resin which acts as the precursor of vitreous carbon (e.g. phenolic resin) is molded into plates and subjected to primary curing at 50-100 deg.C to form half-cured molded plates of >=8mm thickness. A paper essentially comprising cellulose fiber obtd. by mixing rayon fiber containing >90% alpha-cellulose with needle-leaf tree pulp and making into paper is impregnated with a thermosetting resin, dried at 50-120 deg.C and cured to obtain half-cured porous sheets 2 of 10-300mum thickness. Then the molded plates 1 and porous sheets 2 are alternately laminated, hot pressed under 1-100kg/cm<2> pressure at 140-200 deg.C to cure the resin component, and baked at >=800 deg.C in a nonoxidative atmosphere. |
