Patent ID: 7494949

Claim:
A silicon nitride-bonded SiC refractory comprising: SiC as a main phase and Si 3 N 4 and/or Si 2 N 2 O as a secondary phase, and having a bending strength of 150 to 300 MPa, a bulk density of 2.6 to 2.9, and a thermal conductivity of 20 to 80 W/(m·K); wherein said silicon nitride-bonded SiC refractory is formed from a mixture that includes SiC powder having a particle diameter of 30 to 300 μm as aggregate particles in an amount of 30 to 70 mass % constituting the main phase, SiC powder having a particle diameter of 0.05 to 30 μm in amount of 10 to 50 mass %, Si powder having a particle size of 0.05 to 30 μm in an amount of 10 to 30 mass %, and at least one material selected from the group consisting of Al, Ca, Fe, Ti, Zr and Mg in an amount of 0.05 to 3 mass % in terms of an oxide; and wherein an amount of creep exhibited by said silicon nitride-bonded SiC refractory at a temperature of 1400° C. and a holding time of 200 hours is less than 0.1 mm.