Black silicon carbide is made from quartz sand, petroleum coke and high quality silica by high temperature smelting in resistance furnace. Its hardness is between corundum and diamond, mechanical strength is higher than corundum, brittle and sharp.
Silicon carbide (SiC) is made from quartz sand, petroleum coke (or coal coke) and sawdust by high temperature smelting in resistance furnace. Silicon carbide is also a rare mineral in nature, mossamite. Silicon carbide is also called carbide. Among the non-oxide high-tech refractory materials such as C, N and B, silicon carbide is the most widely used and economical one. It can be called gold steel sand or refractory sand.
Applications of black silicon carbide:
Silicon carbide has many other uses besides abrasive because of its stable chemical performance, high thermal conductivity, small thermal expansion coefficient and good wear resistance. For example, coating silicon carbide powder on the inner wall of turbine impeller or cylinder block by special technology can improve its wear resistance and prolong its service life by 1-2 times; high-grade refractory material used for making, thermal shock resistance, small volume and heavy weight. Light weight, high strength and good energy saving effect. Low grade silicon carbide (containing about 85% SiC) is an excellent deoxidizer. It can accelerate steelmaking speed, control chemical composition and improve the quality of steel. In addition, silicon carbide is also widely used in the manufacture of silicon-carbon rods for electrothermal components.
Silicon carbide is a semiconductor with high hardness and excellent thermal conductivity. It can resist oxidation at high temperature.