Purpose and nature of black silicon carbide quality specifications

A black silicon carbide is silicon carbide, refractory materials can be used, it can be used as the abrasive, and green silicon carbide similar are hexagonal crystals, a specific gravity of 3.20 ~ 3.25, microhardness of 2840 ~ 3320kg/mm2.
Black silicon carbide is composed of quartz sand, petroleum coke, wood and other raw materials at high temperatures in a resistance furnace smelting, its hardness between corundum and diamond, the mechanical strength is higher than corundum, brittle and sharp.
1 properties
Great hardness of silicon carbide, with excellent thermal and electrical conductivity, high temperature anti-oxidation.
2 Uses
(1) as an abrasive, can be used for abrasives, such as grinding wheel, Whetstone, grinding, sand tile etc..
(2) as a deoxidizer and high temperature metallurgical materials.
Silicon carbide has four major application areas, namely: functional ceramics, advanced refractories, abrasives and metallurgical raw materials. Currently a large number of silicon carbide coarse material has been able to supply, can not be considered high-tech products, and high-tech application of nanoscale silicon carbide powder is impossible to form a short time scale economies.
(3) high-purity single crystal, can be used for manufacturing a semiconductor, manufacturing a silicon carbide fibers.
3. Origin, exports to the country and quality specifications
(1) Place of Origin: Qinghai, Ningxia, Henan, Sichuan, Guizhou and other places.
(2) exports to country: United States, Japan, Korea, and some European countries.
(3) Specification:
① grade silicon carbide abrasive technical conditions at GB/T2480-96.
② abrasive particle size and composition according to GB/T2477-83. Abrasive grain size determination method according to GB/T2481-83.
Carbide such as silicon carbide refractory itself into the smelting industry also faces significant changes in the performance of pressure, high purity, high toughness, high density silicon carbide, it is in many performance with ordinary silicon carbide has a relatively large difference.
It is not only good toughness, bulk density, water absorption, porosity and purity silicon carbide and other indicators are normal can not be compared, is that it is most advantageous when processed into powder, chemical composition is not reduced, chemical and physical properties maintain the original features. For this reason, high-purity, high toughness, high-density silicon carbide is held in high esteem, the high-quality silicon carbide products for a variety of high-tech fields.