Sintered silicon nitride base ceramic and said ceramic

Details Sintered silicon nitride base ceramic and said ceramic Sintered silicon nitride base ceramic and said ceramic

1975-11-18

1977-05-24

Douglas, Winston A.

Compositions: coating or plastic

Coating or plastic compositions

Metal-depositing composition or substrate-sensitizing...

106 62, 106 65, 106 69, 106 734, 106 735, C04B 3512, C04B 3520, C04B 3542

Patent

active

040253511

ABSTRACT:
A silicon nitride based ceramic is formed of silicon nitride and at least two metal oxides of such a type that when the metal oxides are heated separately they form a spinel. Combination of said metal oxides and said silicon nitride as fine powders and sintering same at a specified temperature for a specified period of time results in a silicon nitride based ceramic having improved mechanical and chemical properties.

REFERENCES:
patent: 2636828 (1953-04-01), Nicholson
patent: 3206318 (1965-09-01), Yamauchi
patent: 3305372 (1967-02-01), Taylor
patent: 3549402 (1970-12-01), Whitney
patent: 3811928 (1974-05-01), Henney et al.
patent: 3821005 (1974-06-01), Layden
patent: 3836374 (1974-09-01), Richerson et al.
patent: 3839540 (1974-10-01), Arrol et al.
patent: 3903230 (1975-09-01), Kamigaito et al.

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