Green Silicon Carbide is produced in an electric resistance furnace from quartz sand, petroleum coke and salt at high temperature. It's semi-transparet in green color with friability, high purity and high hardness. It's suited for grinding hard, brittle and non-metallic such as cemented carbides, optical glass, ceramics,etc.
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 which are widely used in applications requiring high endurance, such as car brakes, car clutches and ceramic plates in bulletproof vests. E
lectronic applications of silicon carbide as light emitting diodes (LEDs) and detectors in early radios were first demonstrated around 1907, and today SiC is widely used in high-temperature/high-voltage semiconductor electronics. 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.Because of the rarity of natural moissanite, most silicon carbide is synthetic. It is used as an abrasive, and more recently as a semiconductor and diamond simulant of gem quality. The simplest manufacturing process is to combine silica sand and carbon in an Acheson graphite electric resistance furnace at a high temperature, between 1600 and 2500 °C. Fine SiO2 particles in plant material (e.g. rice husks) can be converted to SiC by heating in the excess carbon from the organic material.The silica fume, which is a byproduct of producing silicon metal and ferrosilicon alloys, also can be converted to SiC by heating with graphite at 1500 °C.
Pure silicon carbide can be made by the so-called Lely process,in which SiC powder is sublimated in argon atmosphere at 2500 °C and redeposited into flake-like single crystals,sized up to 2×2 cm2, at a slightly colder substrate. This process yields high-quality single crystals, mostly of 6H-SiC phase (because of high growth temperature). A modified Lely process involving induction heating in graphite crucibles yields even larger single crystals of 4 inches (10 cm) in diameter, having a section 81 times larger compared to the conventional Lely process.
Cubic SiC is usually grown by the more expensive process of chemical vapor deposition (CVD).Homoepitaxial andheteroepitaxial SiC layers can be grown employing both gas and liquid phase approaches.Pure silicon carbide can also be prepared by the thermal decomposition of a polymer, poly(methylsilyne), under an inert atmosphere at low temperatures. Relative to the CVD process, the pyrolysis method is advantageous because the polymer can be formed into various shapes prior to thermalization into the ceramic.
Abrasives & Cutting Tools: In the arts, silicon carbide is a popular abrasive in modern lapidary due to the durability and low cost of the material. In manufacturing, it is used for its hardness in abrasive machining processes such as grinding, honing, water-jet cutting and sandblasting. Particles of silicon carbide are laminated to paper to create sandpapers and the grip tape on skateboards.
about us
Yichuan Shengyu Abrasives Co.,Limited is a China producer and supplier of Brown Fused Alumina and White Fused Alumina for refractory, abrasives, blasting and surface preparation industries located in Yichuan County,Luoyang Area,Henan Province. Our products are with the highest quality for refractory bricks, un-shapped refractory purposes, crucibles, casting and painting, precision cutting, grinding,lapping,polishing,sandblasting,shotblasting,anti-slipping purposes and other applications and industries.
Yichuan County is in central China with highly convenient transportation to all over China by highway, railway and air. It is one of the most important manufacturing bases for Brown Fused Alumina and White Fused Alumina, about 70% of BFA exported out of China is produced here.
web:www.sy-fusedalumina.com
We a company focusing in providing our clients in refractory and abrasives industries with quality raw materials&chemicals: Brown Fused Alumina 95% Al2O3, Vice-White Fused Alumina 97% Al2O3, White Fused Alumina for refractory and abrasives and other industrial mierals for refractory and abrasives industry. Our factory is located in Yichuan County, Hennan province, which is the manufacturing base of Brown Fused Alumina.
We focus on R&D of products to make best quality materials to supply to our customers from all parts of China, Japan, Taiwan, Korea, Europe, USA and other parts of the world. Although now 80% of our sales are from domestic market, we are growing quickly into an international company. And we are trying to make more new products and introduce them to our product line so that we can better serve our customers. With more than 15 years manufacturing and sales experience in this industry, we provide with quality materials and our ultimate service. We share with you our experience and knowledge in this industry and will work with you to grow and irmprove our products and service as far as possible.
Main Products:
Refractory Mineral, Abrasives Mineral, Grinding Media. FEPA, GB, JIS standard. Brown Fused Alumina(Brown Fused Aluminum Oxide, Brown Corundum) for refractory and abrasives(0-1mm, 1-3mm, 3-5mm, 5-8mm, 8-12mm, F12-F220, Fines, P12-P220 for coated abrasives, High Temperature and Medium Calcined Brown Fused Alumina; Rolling Machine, Ball Milled, Barmarc Milled, Fixed Furnace, Tilting Furnace), Vice White Fused Alumina with 97% Al2O3 for refractory(0-1mm, 1-3mm, 3-5mm, 5-8mm, 8-12mm), White Fused Alumina(White Fused Aluminum Oxide, White Corundum) for refractory and abrasives(0-1mm, 1-3mm, 3-5mm, 5-8mm, 8-12mm, F12-F220), Pink Fused Alumina, Zirconia Fused Alumina(Zirconium Fused Alumina), Black Fused Alumina, Green Silicon Carbide, Black Silicon Carbide, Glass Beads, Steel Shot, Corindon Marron, Corindon Blanco, Korund, Corundum, Alumino de Oxide, Abrasivos Refractories etc.
