| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a silicon nitride-combined SiC refractory which has heat resistance, thermal shock resistance, oxidation resistance, and high strength, and is excellent in creep resistance and thermal conductivity; and to provide a method for producing the same. <P>SOLUTION: The silicon nitride-combined SiC refractory contains SiC as a main phase and Si<SB>3</SB>N<SB>4</SB>and/or Si<SB>2</SB>N<SB>2</SB>O as sub-phases, and has a bending strength of ≥150 MPa, and a bulk specific gravity of ≥2.6. The method for producing the silicon nitride-combined SiC refractory includes a process for mixing 0.1-3 wt.%, expressed in terms of oxide, of at least one kind selected from Al, Ca, Fe, Ti, Zr and Mg with 30-70 wt.% SiC powder, as aggregate, having grain sizes of 30-300 μm, 10-50 wt.% SiC powder having particle sizes of 0.05-30 μm, and 10-30 wt.% Si powder having particle sizes of 0.05-30 μm. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
