Plastic and nonmetallic article shaping or treating: processes – Pore forming in situ – By mechanically introducing gas into material
Patent
1991-08-14
1993-03-16
Derrington, James
Plastic and nonmetallic article shaping or treating: processes
Pore forming in situ
By mechanically introducing gas into material
264 63, 501 92, C04B 3558
Patent
active
051942011
ABSTRACT:
A method of manufacturing silicon nitride sintered bodies comprising the steps of preparing a powder consisting essentially of 100 parts by weight of silicon nitride, 2.about.15 parts by weight of a rare earth element, 0.5.about.15 parts by weight of a Zr compound and 0.3.about.5 parts by weight of SiC, molding the thus prepared powder and firing the resulting molding.
REFERENCES:
patent: 4187116 (1980-02-01), Lange
Handbook of Chemistry & Physics, The Chemical Rubber Co., Cleveland, Ohio, 50th Edition 1969-1970, B-153.
Asami Seiichi
Kajihara Takehiro
Miwa Shinichi
Derrington James
NGK Insulators Ltd.
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