Method of producing permeable, porous molded bodies of silicon c

Details Method of producing permeable, porous molded bodies of silicon c Method of producing permeable, porous molded bodies of silicon c

1984-02-13

1985-07-30

Derrington, James

Plastic and nonmetallic article shaping or treating: processes

Carbonizing to form article

With carbonizing, then adding carbonizable material and...

264 60, 264 63, 264 65, C01B 3136

Patent

active

045320918

ABSTRACT:
A porous green-state body of carbon, with or without silicon carbide, made with a cokable binder, is crumbled to produce relatively coarse grains in the range from 0.2 to 10 mm and a fraction of the particles so produced with a much more limited range of grain size is then used to produce a second green-state body, which is then coked, siliconized if the silicon is not already provided in the making of the precursor body that was broken up, and converted into a silicon carbide body. If the siliconizing is done by immersion in a bath of molten silicon, the excess silicon is removed by vaporization or by boiling in sodium hydroxide solution.

REFERENCES:
patent: 3947550 (1976-03-01), Fitchmun
patent: 4154787 (1979-05-01), Brown
patent: 4248814 (1981-02-01), Yajima
patent: 4385020 (1983-05-01), Morelock

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