Product Description Raw Material Quartz sand and coal coke (petroleum coke) are produced by high temperature smelting in resistance furnace. Density 3.2g/cm3 Produce Processing Quartz sand , coal coke (petroleum coke) and sodium chloride are produced by high temperature smelting in resistance furnace. Characteristics of silicon carbide Great hardness,Good thermal conductivity, small coefficient of thermal expansion, stable chemical performance, good wear resistance and brittleness