| 摘要 |
PROBLEM TO BE SOLVED: To obtain a porous silicon carbide compact, excellent in durability, hardly dusting and suitably usable in a heat insulating material, etc., of a high- temperature furnace by converting a part or all of a porous carbon compact into silicon carbide. SOLUTION: A thermosetting resin is mixed with a foaming agent, a curing agent and, as necessary, further a modifier, etc., and expanded and cured into a required shape to thereby provide a thermosetting resin foam, which is then carbonized at >=600 deg.C in a nonoxidizing atmosphere to afford a porous carbon compact. A part or all of the resultant porous carbon compact is subsequently converted into silicon carbide according to a method for reacting the porous carbon compact with silicon vapor or various silicon compounds at 1300-2300 deg.C temperature, etc., to thereby provide a porous silicon carbon compact. All or a part of the surface of the porous silicon carbide compact, as necessary, can be covered with a silicon carbide film or a carbon film by a method such as chemical vapor deposition(CVD) or physical vapor deposition(PVD). |
