Method for producing nitride-base ceramics

Details Method for producing nitride-base ceramics Method for producing nitride-base ceramics

Filed on

1988-10-04

Date issued

1989-05-23

Examiner

Dixon, Jr., William R.

Patent Class

Compositions: ceramic

SubClass

Ceramic compositions

SubSubClass

Refractory

Other Related Categories

501 96, 501 98, 525474, 264 65, C04B 3558

Type

Patent

Status

active

Patent number

048331074

Description

ABSTRACT:
Fired nitride-base ceramics, i.e., silicon nitride or oxynitride, having a low carbon content and, therefore, low electrical and thermal conductivities, can be produced by heat treating a ceramic precursor comprising polysilazane, polysiloxazane or polycarbosilazane or a mixture thereof as the main ingredient in a reducing atmosphere such as hydrogen, ammonia or a gas containing these components, followed by firing.

REFERENCES:
patent: 3853567 (1974-12-01), Verbeek
patent: 4097294 (1978-06-01), Rice et al.
patent: 4535007 (1985-08-01), Cannady
patent: 4650773 (1987-03-01), Okamura et al.
patent: 4656300 (1987-04-01), Lebrun et al.
patent: 4743662 (1988-05-01), Lipowitz
U.S. patent application Ser. No. 572,209 Seyferth et al., 1984.

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