Characteristics of different colors of silicon carbide 

Silicon carbide has many colors, and black silicon carbide and green silicon carbide are common.

Commonly used silicon carbide abrasives have two different crystals, one is green silicon carbide, containing more than 97% SiC, mainly used for grinding hard gold-containing tools. Silicon green carbide is made of petroleum coke and silica as the main raw material, adding table salt as an additive, and smelted at high temperature through a resistance furnace. Its hardness is between corundum and diamond, and its mechanical strength is higher than that of corundum. The other is black silicon carbide, which has a metallic luster, contains more than 95% SiC, is stronger than green silicon carbide, but has lower hardness, and is mainly used for grinding cast iron and non-metallic materials.

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