black silicon carbide micro powder polishing material

Product Details

Silicon Carbide is a man made mineral of extreme hardness and sharpness. It is the ideal abrasive for grinding / sanding materials of low tensile strength such as Cast Iron, Brass, Aluminum, Bronze etc. Its thermal properties make it an excellent medium for use in the manufacture of refractory products and crucibles.

Silicon Carbide is produced by a process involving the electrochemical reaction of silica – in the form of quartz with Carbon in the form of raw petroleum coke. The stoichiometric mixture is reacted in an electrical resistance furnace at a temperature greater than 2200˚C to yield high quality crystals. The large crystals are then segregated, crushed, cleaned of magnetic impurities in high intensity magnetic separators and classified into narrow size fractions to suit the end use. Dedicated lines produce products for different applications.

Silicon Carbide Grains are also used in marble and granite polishing, manufacture of Kiln furniture and as a deoxidizer in Iron and steel making.

Silicon carbide

This product, chemical formula of which is SiC, is obtained from the synthesis of high purity quarts sand and petroleum coke as basic raw materials under high temperature in an electric resistance furnace. It contains 85-99% of SiC and the admixtures of Fe2O3, Al2O3, CaO, SiO2, MnO2.

It is characterized by great hardness (9,2 in Mohs scale) and micro hardness (circa 3500 kG/mm2). Its specific gravity (density) of hexagonal type, which is affected by the degree of impurity, comes to 3,15+/-0,05 g/cm3. Bulk density equals 1,30 - 1,58g/cm3. Good thermal conductivity, low thermal expansion (decreasing with temperature growth) and high strength are another characteristics that ensure a wide use of the material. Electrically it is a semiconductor.

Application:

· production of abrasive tools designed for the finishing of the materials that have low resistance to extension, i.e. to the finishing of cast iron,

· aluminum, bronze, zinc, and also for tough and friable materials such as sintered carbide and glass,

· production of abrasive papers and cloths,

· in loose-grain machining, e.g. in gravestone letterer's craft,

· production of incombustible materials, heating elements in