Method for production of sintered silicon nitride article

Details Method for production of sintered silicon nitride article Method for production of sintered silicon nitride article

1986-10-07

1990-03-27

Bell, Mark L.

Plastic and nonmetallic article shaping or treating: processes

Including step of generating heat by friction

264 66, 423344, 501 97, C04B 3558

Patent

active

049118706

ABSTRACT:
A method for the production of a silicon nitride ceramics exhibiting high mechanical strength at elevated temperature is disclosed. This production is effected by a method which comprises preparing a mixture of silicon dioxide with excess carbon as a silicon nitride material for the silicon nitride ceramic, reducing this mixture in an atmosphere of nitrogen, roasting the resulting mixture of silicon nitride with carbon thereby giving rise to a silicon nitride-carbon mixture with the free carbon content thereof adjusted in the range of 0.1 to 3% by weight, molding the produced mixture in combination with a sintering aid in a prescribed shape, calcining the molded mixture, and thereafter sintering the calcined mass.

REFERENCES:
patent: 4280989 (1981-07-01), Seimiya et al.
patent: 4414190 (1983-11-01), Seimiya et al.
patent: 4514370 (1985-04-01), Inoue et al.

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