Chemical Composition of silicon carbide

Silicon carbide includes black silicon carbide and green silicon carbide,is produced in electrical internal resistance furnaces from silica sands and petroleum coke(added salt during smelting when produce green silicon carbide).

And chemical composition of silicon carbide is as follows:

SiC                                 ≥98.6%

C_F                                  ≤0.20%

Fe₂O₃                               ≤0.40%

SiO₂                               ≤0.05%