What is the difference between black silicon carbide and green silicon carbide

Silicon carbide has two commonly used basic varieties, black silicon carbide, and green silicon carbide, both of which belong to α-SiC. Green silicon carbide is basically the same as black silicon carbide, but the raw materials and manufacturing processes are different. The product is green and translucent, and its hardness and purity are better than black silicon carbide.

Silicon carbide

Its elastic coefficient reaches 410GPa, and it will not dissolve under normal temperature and pressure. It will be worn out when the temperature reaches above 1600°C, and it will decompose when it reaches 2815.5°C.

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. It is mostly used for processing hard alloys, titanium alloys, and optical glass, and is also used for honing cylinder liners and fine-grinding high-speed steel tools. In addition, there is cubic silicon carbide, which is a yellow-green crystal produced by a special process. The abrasive tools used to make it are suitable for the superfinishing of bearings. The surface roughness can be processed from Ra32-0.16 microns to Ra0.04- 0.02 microns.

Green silicon carbide chemical coefficient: Due to its stable chemical properties, high thermal conductivity, small thermal expansion coefficient, and good wear resistance, it has many other uses besides being used as an abrasive; It is small, light in weight, and high in strength, and has a 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 fine powder can also be used as a ceramic material. Due to the high purity of black silicon carbide, it is also widely 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 through a high-temperature resistance furnace. Its hardness is between corundum and diamond, its mechanical strength is higher than that of corundum, and it is brittle and sharp.

Silicon carbide powder

Anyang Lishi Industrial is a professional manufacturer of silicon carbide and has established long-term cooperative relationships with many foreign customers. If you have any needs, welcome to send inquiries to us!




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