| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method for producing an inexpensive, porous β-type silicon carbide sintered compact with a high thermal shock resistance and freely controllable porosity and pore diameter. <P>SOLUTION: The method for producing the porous β-type silicon carbide sintered compact comprises immersing an organic molded article in a slurry containing silicon nitride and a carbon source and firing the immersed molded article in a non-oxidative atmosphere. Preferably, the silicon nitride is a β-type powder; the carbon source is at least one selected from among a phenol resin, an epoxy resin, a furan resin, a phenoxy resin, an oligosaccharide (e.g. sucrose), a polysaccharide (e.g. cellulose or starch), pitch, and tar; and a nitrogen gas is used for a non-oxidative atmosphere. Thus produced porous β-type silicon carbide sintered compact is suitable for a diesel particulate filter (DPF). <P>COPYRIGHT: (C)2004,JPO&NCIPI |
