Compositions: ceramic – Ceramic compositions – Refractory
Patent
1994-11-29
1995-12-26
Group, Karl
Compositions: ceramic
Ceramic compositions
Refractory
423344, C04B 35584
Patent
active
054787840
ABSTRACT:
Disclosed is a powder of silicon nitride particles having a specific surface area of from 5 to 20 m.sup.2 /g. When an aqueous solution of a polyvinyl alcohol having a mean degree of polymerization of X and a degree of saponification of Y (mol %) is adsorbed to the powder, the amount of saturated adsorption at 20.degree. C. is not higher than the amount of adsorption to be represented by:
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patent: 5273942 (1993-12-01), McCauley et al.
patent: 5348919 (1994-09-01), Kuwabara et al.
patent: 5378666 (1995-01-01), Bachelard et al.
patent: 5382554 (1995-01-01), Kuwabara et al.
Shibata Koji
Yamada Tetsuo
Yanagisawa Hiroshi
Group Karl
Ube Industries Ltd.
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