Compositions: ceramic – Ceramic compositions – Carbide or oxycarbide containing
Reexamination Certificate
2006-09-19
2006-09-19
Group, Karl E. (Department: 1755)
Compositions: ceramic
Ceramic compositions
Carbide or oxycarbide containing
C423S345000
Reexamination Certificate
active
07109138
ABSTRACT:
The synergistic composition consists of a mixture of a source of pure silica such as silicon dioxide, a source of carbon such as activated charcoal, β-silicon carbide and a source of iron such as ferric nitrate. The cost effective synergistic composition is useful for the preparation of improved silicon carbide powder containing at least 90% SiC preferably rich in the β-phase. Silicon carbide powder finds wide usage in the manufacture of products suitable for refractory and engineering applications.
REFERENCES:
patent: 3754076 (1973-08-01), Cutler
patent: 3836356 (1974-09-01), Irani
patent: 3920446 (1975-11-01), Irani
patent: 5525556 (1996-06-01), Dunmead et al.
Bandyopadhyay Siddhartha
Maityi Himadri Sekhar
Council of Scientific and Industrial Research
Group Karl E.
Nixon & Vanderhye P.C.
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