Process for producing sintered silicon nitride-base body

Details Process for producing sintered silicon nitride-base body Process for producing sintered silicon nitride-base body

1982-11-22

1985-04-16

Derrington, James

Plastic and nonmetallic article shaping or treating: processes

Including step of generating heat by friction

501 97, C04B 3558

Patent

active

045115257

ABSTRACT:
Disclosed is a process for producing a sintered silicon nitride-base body, which comprises; mixing powder (A) of heat-treated or not heat-treated silicon nitride powder and powder (B) of powder obtained by heat-treating a powdery mixture of silicon nitride powder and a sintering additive in a non-oxidizing atmosphere and then grinding the resulting heat-treated products into powder; and forming the resultant powdery mixture into a desired shape, which is then sintered in a non-oxidizing atmosphere.
The process is characterized by heating powder (B), or powder (A) and powder (B), before sintering, thereby producing sintered silicon nitride body of highly improved properties.

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