| Carborundum, also known as silicon carbide (SIC), is made of quartz sand, petroleum coke (or coal coke), sawdust (salt is needed in the production of green silicon carbide) and other raw materials by high-temperature smelting in resistance furnace. Silicon carbide is also a rare mineral in nature, morsonite Silicon carbide is also called carborundum. Among the non oxide high-tech refractory materials such as C, N and B, silicon carbide is the most widely used and economical one, which can be called steel sand or refractory sand At present, China's industrial silicon carbide is divided into black silicon carbide and green silicon carbide, both of which are hexagonal crystals, with a specific gravity of 3.20-3.25 and a microhardness of 2840-3320kg / mm2. |
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