Chemistry of inorganic compounds – Silicon or compound thereof – Binary compound
Patent
1990-07-24
1992-10-20
Chaudhuri, Olik
Chemistry of inorganic compounds
Silicon or compound thereof
Binary compound
264 65, 264 66, 423406, 501 97, C01B 2106, C04B 3558
Patent
active
051568306
ABSTRACT:
A process for preparing an alpha-phase silicon nitride material and thereafter converting to non-densified beta-phase silicon nitride material includes comminuting a slurry including a mixture of silicon powder and water to form non-oxidized surfaces on the silicon powder and to allow chemical reaction between the silicon and water, reducing the water content of the reacted slurry to a degree sufficient to form a resultant dry mass, nitriding the dry mass by exposure to a nitriding gas including at least nitrogen to form a mass of alpha-phase silicon nitride, and converting the resultant silicon nitride mass at a conversion temperature of from about 1450.degree. C. to about 2100.degree. C. to convert the silicon nitride from an alpha-phase material to a non-densified beta phase silicon nitride material.
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Edler James P.
Lisowsky Bohdan
Cargill L. E.
Chaudhuri Olik
Eaton Corporation
Horton Ken
Rulon P. S.
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