Silicon carbide

详情

Silicon carbide
Green silicon carbide mainly divides into the black silicon carbide and silicon carbide.Silicon carbide is also called the moissanite.In contemporary C, N, B the oxide refractory raw materials in the high technology, such as silicon carbide as the most widely used, one of the most economic.Can be called corundum sand or refractory.Among them: black silicon carbide is quartz sand and petroleum coke and high quality silica as the main raw material, through high temperature electric resistance furnace smelting.Its hardness is between fused alumina and between diamond and mechanical strength higher than that of corundum, sharp and crisp.Black silicon carbide, metal luster, containing SiC by more than *5%, the strength is larger than the green silicon carbide, but hardness is low, it is mainly used for grinding of cast iron and non-metallic materials.
Silicon carbide (SiC) is using quartz sand and petroleum coke or coal tar, wood chips as raw material through high temperature electric resistance furnace smelting.There is also a rare mineral silicon carbide in nature, and the mo SangShi.Silicon carbide is also called the moissanite.In contemporary C, N, B the oxide refractory raw materials in the high technology, such as silicon carbide as the most widely used, one of the most economic.Can be called corundum sand or refractory.At present, the industrial production of silicon carbide can be divided into two black silicon carbide and green silicon carbide, are the six-party crystal, specific gravity of 3.*0 ~ 3.*5, the microhardness of ***0 ~ ***0 kg/was.
  
Silicon carbide purpose
1, main silicon carbide abrasive, stability of high hardness, toughness determined by sic grinding tool can be used in the manufacture of consolidation, coated abrasive free grinding glass, ceramics, stone, cast iron and some non-ferrous metals, hard alloy, titanium alloy, high speed steel cutter grinding wheel, etc.
2, refractory corrosion resistant material - main silicon carbide with high melting point (temperature), chemical inert reting resistance silicon carbide can be used for abrasive, ceramic products by burning kiln with shed board saggar, zinc smelting industry vertical cylinder distillation furnace with carbon silica brick, aluminum electrolytic cell line, crucible, such as a furnace material of silicon carbide ceramic products.
3, chemical use, silicon carbide steel melt steel hydrolysis and free oxygen, metal oxide reaction of carbon containing silicon oxide slag for smelting steel cleaning agent is used for steelmaking deoxidizer cast iron tissue conditioner, generally with using low purity of silicon carbide to reduce the raw material for manufacturing silicon tetrachloride.
4, electrical use, used for high temperature heating element, nonlinear resistance element semiconductor material silicon carbide heating element used in the ***0 ~ ***0 ℃(furnace) nonlinear resistance element all kinds of lightning protection valve plates.
5, the far-infrared radiation coating or silicon carbide silicon dryer with far infrared radiation.
New silicon carbide products is widely used in a particular industry, air conditioning, automotive engine, communications equipment, radar stations, the missile defense system, the space shuttle, and are used on aircraft carrier, especially in the aspect of space, some special parts, silicon carbide products to be reckoned with, and the effect of foreign resources, has the advantages of domestic, therefore, the development of an opportunity is also relatively well.
 
Matters needing attention
1, transport and loading and unloading: silicon carbide in the process of transportation, shall not use iron hook towing, should prevent and hard material mixture, not a strong vibration, friction, hit, hit, it is strictly prohibited to throw, should be light light discharge, in order to reduce packaging, affect the use.
2, storage: should be stored in a cool and dry place, prevent both inside and outside packing bag is broken, and prevent be affected with damp be affected with damp and other substances, deposit effect use effect and to stay away from pollution sources.
3, it is strictly prohibited under water: silicon carbide belongs to high abrasive, so in the process of transportation, storage and use, will absolutely prevent water immersion, due to flooding, seriously affect the use effect.