Method for producing a sintered silicon nitride base ceramic and

Details Method for producing a sintered silicon nitride base ceramic and Method for producing a sintered silicon nitride base ceramic and

1973-10-23

1976-04-13

Arnold, Donald J.

Plastic and nonmetallic article shaping or treating: processes

Including step of generating heat by friction

106 62, 106 65, 106 735, 264 66, 264332, F27D 706, C04B 3558

Patent

active

039504646

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: 3549402 (1970-12-01), Whitney
patent: 3811928 (1974-05-01), Henney et al.
Kingery, Introduction to Ceramics, p. 40, (1967).
Coles et al., "Formation and Reactivity of Nitrides: III, Boron, Aluminum, and Silicon Nitrides," J. Appl. Chem., 19, [6] pp. 178-181, (1969) - Abstract.

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