Difference between green silicon carbide and black silicon carbide

Green silicon carbide and black silicon carbide are basically the same, but the raw materials and smelting process are different.

Green silicon carbide is green, with higher hardness and purity than black silicon carbide.

Black silicon carbide contains about 98.5% SiC, and its toughness is higher than green silicon carbide. It is mainly used for processing materials with low tensile strength, such as glass, ceramics, stone, refractory, cast iron and non-ferrous metals.

Green silicon carbide contains more than 99% SiC and has good self sharpening characteristics. In addition, there is cubic silicon carbide, which is a yellow green crystal obtained by a special process. The grinding tools used to make it are suitable for super finishing of bearings.

Green silicon carbide chemical coefficient: due to its stable chemical property, high thermal conductivity, small thermal shrinkage coefficient, and good wear resistance, it has many other uses besides abrasives; Small size, light weight, high strength and good energy-saving effect.

Green silicon carbide is suitable for grinding hard alloys, metals and hard brittle non-metallic materials such as copper, brass, aluminum, precious stones, optical glass, ceramics, etc. Its fine powder can also be used as ceramic materials. Because of its high purity, black silicon carbide is also commonly used to make refractories and various abrasive tools.

Black silicon carbide is made of quartz sand, petroleum coke and high-quality silicon dioxide as the main raw materials, which are melted in a resistance furnace at high temperature. Its hardness is between corundum and diamond, its mechanical strength is higher than corundum, and it is brittle and sharp.