Compositions: ceramic – Ceramic compositions – Refractory
Patent
1984-05-24
1985-08-06
Bell, Mark L.
Compositions: ceramic
Ceramic compositions
Refractory
501120, 501127, 501128, C04B 3558, C04B 3518, C04B 3510
Patent
active
045336466
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 as well as fines of the above mentioned refractory aggregate needed to achieve the desired screen analysis. The silicon metal and alumina react in the nitriding atmosphere to form a low porosity matrix generally comprising silicon oxynitride with corundum distributed therethrough.
REFERENCES:
patent: 2636826 (1953-04-01), Nicholson
patent: 2752258 (1956-06-01), Swentzel
patent: 3991166 (1976-11-01), Jack et al.
patent: 4104075 (1978-08-01), Hayashi et al.
patent: 4187116 (1980-02-01), Lange
patent: 4243621 (1981-01-01), Mori et al.
Wang Ke-Chin
Winkelbauer Howard M.
Bell Mark L.
Deutsch Barry E.
Dresser Industries Inc.
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