SiC refractory comprising silicon nitride bond thereto and...

Details SiC refractory comprising silicon nitride bond thereto and... SiC refractory comprising silicon nitride bond thereto and...

2004-07-23

2009-02-24

Group, Karl E (Department: 1793)

Compositions: ceramic

Ceramic compositions

Carbide or oxycarbide containing

C501S097200, C501S097400

Reexamination Certificate

active

07494949

ABSTRACT:
A silicon nitride-bonded SiC refractory is provided, which includes SiC as a main phase and Si3N4and/or Si2N2O as a secondary phase and which has a bending strength of 150 to 300 MPa and a bulk density of 2.6 to 2.9. A method for producing a silicon nitride-bonded SiC refractory is also provided, which comprises a step of mixing 30 to 70% by mass of a SiC powder of 30 to 300 μm as an aggregate, 10 to 50% by mass of a SiC powder of 0.05 to 30 μm, 10 to 30% by mass of a Si powder of 0.05 to 30 μm, and 0.1 to 3% by mass, in terms of oxide, of at least one member selected from the group consisting of Al, Ca, Fe, Ti, Zr and Mg.

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