Emery scientific name of silicon carbide of SiC.Silicon carbide hardness only to diamond, boron carbide and cubic boron nitride, ranked fourth in the inorganic material.Through hot pressing sintering method, a high density of silicon carbide.It has high strength and good oxidation resistance, high temperature deformation, can be used as high temperature gas turbine on the turbine blades, but also for the wear of the sealing material, but also for the nozzle of the rocket nozzle and lightand bulletproof supplies.The unit cell is face-centered cubic structure, each unit cell contains four C atoms four Si atoms.Similar to the diamond structure.Pure is a colorless crystal.Density of 3.06 to 3.20.Great hardness, which is about 9 degrees Mohs.The general is a colorless powder particles.After grinding, can be used for abrasive powder, it can be to polish the paper, but also the system the friction surface of the grinding wheel and whetstone.Enhance thermal system on the electric stove in the sand and the amount of carbonEmery, also known as the garnet is a silicate mineral, after hydraulic carefully selected, abrasive materials made by mechanical processing, screening and classification methods, mainly used for grinding glass products products, industrial rust and water cut(1) on the silicon optical lens, precision instruments, polishing glass bulb glass, ceramic stone, leather, plastic, metal parts can improve the finish(2) sandblasting cutting, must be material to the manufacturing of grinding wheels, whetstone, emery cloth, sand(3) can be used as the construction of highway pavement, runways, wear rubber, industrial floor anti-slip paint, etc. the good and the wear-resistant materials(4) can be used for the chemical, petroleum, pharmaceutical, water treatment filter media and the drilling mud weighting agent(5) has a good effect of electroplating, nuclear pollution, protection of sand washing plant jeans sandblasting workshop. Quality water cutting industry with sandThe emery physical indicators: the density 3.96-4.10g/cm3, the melting point of 1180-1280 ° C, Mohs hardness 7.49-8.00 specification :8-220 mesh.Chemical composition; of SiO2 35-40%, Al2O3, 18-20%, FeO 25-37% and Fe2O3 0.9-1.0%, MnO, 0.5-2.0% and MgO 0.2-1.4% and CaO (2.2-3.9%)