Model No.	Chemical Composition (%)
	SiC	F.C.	Fe2O3
	≥	≤
SiC 98	98	0.3	0.3
SiC 97	97	1.0	1.5
SiC 95	95	1.5	2.5
SiC 90	90	3.0	2.5
SiC 88	88	4.0	3.0
SiC 80	80	5.0	4.0
SiC 70	70	7.0	5.0

Silicon Carbide is a chemical compound mainly consist of silicon and carbon. SIlicon Carbide SiC is produced in electrical resistance furnace from silica sand or quartz sand and petroleum coke in high temperature. In addition, the function of industrial salt (NaCl) is to facilitate the removal of alumina and oxidized matter present in the material. Iron and other impurities.

Pure silicon carbide is colorless and transparent, but due to the presence of free carbon, iron, silicon and other impurities in industrially produced silicon carbide. However, the relative molecular mass of silicon carbide is 40.09, of which silicon accounts for 70.04% and carbon accounts for 29.964%. True density 3.21. Melting point (sublimation) 2600℃.

Silicon carbide has a high melting point, low specific gravity, Mohs hardness of 9.2, high strength, and good thermal shock stability. Moreover, it is insoluble in water and acid, but it can dissolve in molten alkali. Silicon carbide has poor oxidation resistance between 800 and 1140°C, because the oxide film (SiO2) generated at this time is loose and cannot provide sufficient protection.

Applications of SiC

Metallurgy grade Silicon Carbide is a good deoxidizer and additive of silicon and carbon in steel and casting industry. It also improved the toughness and hardness of the steel and iron. For example, SiC88 and SiC90 is most commonly used SiC model;

Because SIlicon Carbide SiC abrasive has high hardness, chemical stability and certain toughness, it is a very versatile abrasive. It applies to make grinding wheels, whetstones, coated abrasives, glass, ceramics, stone, cast iron and some non-ferrous metals. Meanwhile, has poor reactivity with these materials.

Silicon carbide refractory materials have excellent high-temperature properties. Such as high strength, high thermal conductivity, impact resistance, oxidation resistance, wear resistance, and corrosion resistance. As a result, it is widely used in metallurgy, energy, chemical and other industries.