In metallurgical production, we often see silicon carbide resistance with green silicon carbide and black silicon carbide two different colors of silicon carbide, today to introduce two different colors of silicon carbide production mode: green silicon carbide and black silicon carbide production mode is basically the same, but different requirements for raw materials. Green silicon carbide is petroleum coke and high quality silicon dioxide as the main raw material, salt as additives, through the resistance furnace high temperature smelting, smelting into high purity crystal, high hardness, its hardness between corundum and diamond, mechanical strength is higher than emery. High crystal purity, high hardness.
Black silicon carbide, green silicon carbide manufacturing method, but the raw material purity requirements are higher, in the form of 2200°C resistance furnace, high temperature is green, translucent, hexagonal, black silicon carbide content is higher, physical properties and black silicon carbide similar, but its performance is slightly black brittle, but also has good thermal conductivity and electrical properties.