SiC, also known as silicon carbide, is produced through a high-temperature smelting process in a resistance furnace. The raw materials used in the production include quartz sand, petroleum coke (or coal coke), sawdust, and salt (only for green silicon carbide). These materials are carefully selected to ensure high-quality end products. During the production process, the raw materials are heated to extreme temperatures, causing them to react and form crystalline silicon carbide. The resultant SiC has excellent properties, including high thermal conductivity, high strength, and excellent resistance to wear and corrosion. This makes it ideal for use in various industrial applications, including automotive, aerospace, electronics, and energy production.
According to Mohs hardness scale, the theoretical hardness of green silicon carbide is 9.4, whereas black silicon carbide has a slightly lower theoretical value of 9.15. Therefore, in theory, green silicon carbide is considered to have a slightly higher hardness.