What is silicon carbide? The author tells you.

Introduction to Silicon Carbide

Silicon carbide (SiC) is made by high-temperature smelting of resistance sand using quartz sand, petroleum coke (or coal coke), wood chips (need to add salt when producing green silicon carbide).

black silicon carbide

Silicon carbide also has a rare mineral in nature, Moissanite. Silicon carbide is also called moissanite. Among contemporary non-oxide high-tech refractory raw materials such as C, N, and B, silicon carbide is the most widely used and economical type, which can be called gold steel sand or refractory sand.

green silicon carbide

At present, silicon carbide produced in China is divided into black silicon carbide and green silicon carbide, both of which are hexagonal crystals with a specific gravity of 3.20 to 3.25 and a microhardness of 2840 to 3320kg/mm2.

Silicon carbide hardness

Silicon carbide, also known as gold steel sand, is a very high Mohs hardness material; the Mohs hardness of silicon carbide is between diamond and corundum,
The Mohs hardness is higher than corundum, but lower than the diamond with the highest Mohs hardness: 9<Silicon carbide Mohs hardness<10.

Silicon carbide structure

The silicon carbide bai crystal structure is divided into hexagonal or rhombohedral α-SiC and cubic du zhi β-SiC (called cubic silicon carbide). The silicon carbide crystal has 4 carbon atoms and 4 Si atoms in one unit cell. Due to the different stacking sequence of carbon and silicon atoms in its crystal structure, α-SiC constitutes many different variants. β-SiC transforms to α-SiC when it exceeds 2100°C.

Silicon carbide density

3.2g/cm³

Silicon carbide melting point

2700℃(sublimation)