Silicon carbide (sic), also known as carborundum, is a compound of silicon and carbon with chemical formula sic. It occurs in nature as the extremely rare mineral moissanite. Silicon carbide powder has been mass-produced since 1893 for use as an abrasive. Grains of silicon carbide can be bonded together by sintering to form very hard ceramics  that are widely used in applications requiring high endurance, such as car brakes, car clutches and ceramic plates in bulletproof vests. Electronic applications of silicon carbide as light-emitting diodes (leds) and detectors in early radios were first demonstrated around 1907. Today sic is used in semiconductor electronics applications that are high-temperature, high-voltage or both. Large single crystals of silicon carbide can be grown by the lely method; they can be cut into gems known as synthetic moissanite. Silicon carbide with high surface area can be produced from sio2 contained in plant material.
Black silicon carbide use quartz sand and petroleum coke as the main raw material, smelting the raw material at high temperature electric resistance furnace . Black silicon carbide contains SiC about 95%. The toughness is higher than that of green silicon carbide, black crystals. The microhardness is HV3100-3280kg / mm², brittle and sharp and has a certain electrical conductivity and thermal conductivity. Abrasive made of black silicon carbide is suitable for grinding cast iron, nonferrous metals and rubber, leather, plastic, wood, minerals and other non-metallic materials. Additionally, you can make advanced refractory material and so on.
Green silicon carbide for refractories
Green silicon carbide(sic) can also be used for refractory applications because of its high strength, low expansion rate and good thermal conductivity for refractory materials, special ceramics, coating and plastic fillings etc.
Physical and chemical properties
True gravity: ?3.15 g /cm3
Bulk density: 1.20-1.60 g / cm3
Mosh hardness: ?9
Color: green/light green
Melting point: 2700 celcius degree
Sizes: 0-1mm, 1-3mm, 3-5mm, 0-10mm etc.
Applications of refractory grade green silicon carbide
Products of various high grade shaped and unshaped refractory materials
Used for semi-conductor deoxidizer
Used as deoxidizer in steel making industry to improve quality and productivity of steel
Production of silicon carbide rod in electric thermal industry
Silica, silicon carbide, silicon carbide, also known as carbon refractory sand, is made of quartz sand and petroleum coke, sawdust and other raw materials in smelting in electric resistance furnace, high temperature and be become.Green silicon carbide black silicon carbide and silicon carbide two commonly used basic varieties: (1) black silicon carbide containing SiC by about 95%, its toughness is higher than the green silicon carbide, mostly used for processing low tensile strength of material, such as glass, ceramics, stone, refractory material, cast iron and nonferrous metal, etc.;(2) the green silicon carbide containing SiC98 % above, good self-sharpening, mostly used for processing hard alloy, titanium alloy and optical glass, also used for honing cylinder jacket and fine grinding HSS cutting tools.
Green Silicon Carbide is produced basically in the same way as black silicon carbide in a resistance type electric furnace with petroleum coke, quartz sand and other materials. It has a good hardness, strong cutting ability, stable chemical properties and excellent heat-conducting property.
Green silicon carbide is produced as the same type as the black silicon carbide, except the different raw materials.Ití»s crystallization have higher purity and hardness.Green silicon carbide is suitable for processing hard alloy, metallic and non-metallic marterails with hard and brittle feature such as copper, brass, aluminium, magnesslum , jewel, optical glass, ceramics, etc.Super micropower of it is also a kind of ceramics material.
