Nitride bonded oxide refractories

Details Nitride bonded oxide refractories Nitride bonded oxide refractories

C - Chemistry, Metallurgy

04

B

261/1, 25/128

C04B 35/58 (2006.01) C04B 35/101 (2006.01) C04B 35/44 (2006.01) C04B 35/65 (2006.01) C04B 35/66 (2006.01)

Patent

CA 1203254

Nitride Bonded Oxide Refractories Abstract This invention relates to a method for producing nitride bonded refractory shapes in which the bonding matrix is formed in situ. The method comprises forming a batch including a coarser portion selected from the group calcined and fused aggregates of alumina, aluminosilicate, and magnesium aluminate spinel and a finer portion consisting essentially of finely divided silicon metal and alumina. The silicon metal and alumina react in the nitriding atmosphere to form a low porosity matrix generally comprising silicon oxynitride with corundum distributed therethrough.

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