T he Black Sic product of High Density, Great Crystalline Form Hexagonal is made by Quartz Grain and petroleum Coke. We used advanced technology which come from abroad. This product has high compact density, big grain of crystallize and high purity. The hardness and toughness of black Sic are better than green SiC, when they have same content. This product is applicable of grind-material, high refractory material, engineering pottery and porcelain and so on.