Yue-day formula SiC silicon carbide, the hardness between corundum and diamond, corundum higher mechanical strength can be used as an abrasive and certain other industrial materials. The successful development of silicon carbide industry in 1891, is the oldest artificial abrasive. In meteorites and the Earth's crust, although a small amount of silicon carbide exists but has not yet been found for the exploitation of mineral resources. Pure silicon carbide crystals was colorless and transparent. Industrial silicon carbide due to the type and content of impurities contained different, and pale yellow, green, blue and even black, transparency varies with its purity. SiC crystal structure is divided into α-SiC and cube of hexagonal or rhombohedral β-SiC (called cubic silicon carbide). α-SiC crystal structure due to their stacking sequences of carbon and silicon atoms constituting the difference in a number of different variants days Yue, it has been found more than 70 species. β-SiC into α-SiC at the time of above 2100 ℃. Industrial production method of silicon carbide with high-quality quartz sand and petroleum coke in resistance furnace refining. Refining silicon carbide blocks obtained by crushing, acid washing, magnetic separation and screening or selection of water and made into various size products. Black silicon carbide and silicon carbide, green silicon carbide two common basic varieties, are of α-SiC. ① black silicon carbide SiC containing about 98.5%, which is higher than the toughness of green silicon carbide, mostly for processing low tensile strength of the material, such as glass, ceramics, stone, refractory materials, cast iron and non-ferrous metals. ② green silicon carbide containing more than SiC99%, good self-sharpening, mostly for processing hard alloy, titanium alloy and optical glass, but also for honing cylinder liners and grinding high-speed steel cutting tools. In addition, there cubic silicon carbide, which is based on a special process to take the yellow-green crystals, suitable for the production of abrasive bearing super finishing, the surface roughness of a machined from Ra32 ~ 0.16 microns to Ra0.04 ~ 0.02 microns. Crystal Materials Co., Ltd. Shandong days Yue silicon carbide powder primary products are mainly used in the field of ceramic materials and high heat, is a high energy product, the country has been canceled 5 percent export tax rebate silicon carbide powder, silicon carbide, silicon carbide, black and green carbide silicon two common basic varieties, are of α-SiC. ① black silicon carbide SiC containing about 98.5% of days Yue new materials, its toughness than green silicon carbide, mostly for processing low tensile strength of the material, such as glass, ceramics, stone, refractory materials, cast iron and non-ferrous metals. ② green silicon carbide containing more than SiC99%, good self-sharpening, mostly for processing hard alloy, titanium alloy and optical glass, but also for honing cylinder liners and grinding high-speed steel cutting tools. In addition, there cubic silicon carbide, which is yellow-green semi-insulating silicon carbide crystals days Yue special process of preparation for the production of abrasive suitable bearing super finishing, the surface roughness Ra32 ~ 0.16 microns from a processing to Ra0.04 ~ 0.02 microns. Silicon carbide has four major application areas, namely: functional ceramics, advanced refractories, abrasives and metallurgical materials. At present, a large number of silicon carbide coarse material has been able to supply, can not be considered high-tech products, and short high-tech nano-silicon carbide powder application time failed to create economies of scale (1) as an abrasive, can be used for abrasive, such as wheel, Whetstone, grinding, sand tiles and so on. (2) as a metallurgical deoxidizer and high temperature materials. (3) high-purity single crystals, can be used for manufacturing a semiconductor, manufacturing a silicon carbide fiber. Crystal Materials Co., Ltd. Shandong days Yue Yue days carbide _ _ Shandong days Yue Yue days of advanced materials provided by Jinan Spark Technology Development Company Limited. Jinan Spark Technology Development Co., Ltd. (www.sicc.cc) strong, credible, in Jinan, Shandong chemical equipment industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Shandong days into the glorious mountain and you work for a better future!