Black silicon carbide contains about 98.5% SiC, and its toughness is higher than that of green silicon carbide. It is mostly used for processing materials with low tensile strength, such as glass, ceramics, stone, refractory materials, cast iron and non-ferrous metals.
Green silicon carbide contains more than 99% SiC and has good self-sharpening properties. In addition, there is cubic silicon carbide, which is a yellow-green crystal obtained by a special process. The abrasive tool used to manufacture it is suitable for super-finishing of bearings.
Green silicon carbide chemical coefficient: due to its stable chemical properties, high thermal conductivity, small thermal shrinkage coefficient, and good wear resistance, it has many other uses besides abrasives; Small size, light weight and high strength, good energy saving effect.
Green silicon carbide is suitable for grinding copper, brass, aluminum, precious stones, optical glass, ceramics and other hard alloys, metals and hard and brittle non-metallic materials. Its micropowder can also be used as a ceramic material. Due to the high purity of black silicon carbide, it is also commonly used in the manufacture of refractory materials and various abrasive tools.
Black silicon carbide is made of quartz sand, petroleum coke and high-quality silica as the main raw materials, and is smelted at high temperature in a resistance furnace. Its hardness is between corundum and diamond, its mechanical strength is higher than corundum, and it is brittle and sharp.