C - Chemistry – Metallurgy – 01 – B
Patent
C - Chemistry, Metallurgy
01
B
25/125
C01B 31/36 (2006.01) B01D 39/20 (2006.01) C04B 35/36 (2006.01) C04B 35/573 (2006.01) C04B 38/00 (2006.01)
Patent
CA 1219736
ABSTRACT OF THE DISCLOSURE A porous green-state body of carbon, with or without silicon carbide, is made with a cokable binder in accordance with methods disclosed in United States Patents 3,927,187; 4,059,682 and 4,060,592 from powders prepared in accordance with published German patent application DE-OS 30 05 587. The thus prepared body is then 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.
447731
Dias Francisco J.
Kampel Marian
Luhleich Hartmut
Kernforschungsanlage Julich Gesellschaft Mit Beschrankter Haftun
Smart & Biggar
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