SiC has passed ISO certified
1.good hardness
2.has good wear-resisting property
3.has small coefficient of thermal expansion
1.good hardness
2.has good wear-resisting property
3.has small coefficient of thermal expansion
Pure SiC is colorless and transparent crystal.Industrial silicon carbide due to impurities contained in different types and levels, but was light yellow, green, blue and even black,
transparency varies with its purity.SiC crystal structure is divided into six or rhombohedron of α-SiC and cubic β-SiC (called cubic silicon carbide).α-SiC crystal structure
because of its carbon and silicon atoms form different stacking sequence of many different variants have been found in 70 species.β-SiC at 2100 °C above into α-SiC.
Black and green silicon carbide silicon carbide silicon carbide used two basic varieties, are considered α-SiC.(1)black silicon carbide SiC containing about 98.5%, higher than
the toughness of the green silicon carbide, mostly for the processing of low tensile strength materials such as glass, ceramics, stone, refractory material, cast iron and non-
ferrous metals.(2)green silicon carbide with SiC99% or more, since the sharpness is good, mostly for processing hard alloy, titanium alloy and optical glass, also used for
honing cylinder liners and grinding high speed steel cutting tools.There are also cubic silicon carbide, which is a special process Preparation of yellow-green crystals, suitable
for the production of bearings super abrasive finishing, make the surface roughness Ra32 ~ 0.16 micron from a process to Ra0.04 ~0.02 micron.
As the chemical properties of silicon carbide stability, high thermal conductivity, thermal expansion coefficient, good wear resistance, in addition to abrasive used, there are
many other uses, such as: a special technique to silicon carbide powder coating on the turbine impeller or cylinder blockwall, can improve the wear resistance and extend the
service life of 1 to 2 times; made of high-level refractory material used, heat shock, small volume, weight light and high strength, good energy saving effect.Low-grade silicon
carbide (SiC containing about 85%) is an excellent deoxidizing agent, use it to speed up the steel-making speed, and easy to control the chemical composition, to improve the
quality of steel.In addition, silicon carbide is also used extensively for production of silicon carbide heating elements.
Silicon carbide is very hard, has excellent thermal conductivity, is a semiconductor, high temperature resistant to oxidation.
Use
(1) as the abrasive, can be used for abrasive, such as grinding wheels, whetstone, grinding wheel, sand tiles etc.
(1) as the abrasive, can be used for abrasive, such as grinding wheels, whetstone, grinding wheel, sand tiles etc.
(2) as a deoxidizing agent and high temperature materials, metallurgy.
SiC there are four main application areas, namely: functional ceramics, advanced refractories, abrasives and metallurgical materials.Currently coarse silicon carbide have been
available in large numbers, can not be considered high-tech products, high-tech applications nanometer silicon carbide powder is impossible to form a short time scale.
(3) high purity single crystal, can be used to manufacture semiconductors, manufacture of silicon carbide fibers.
Place of origin, exports to the country and quality specifications
(1) Origin: Changbai Mountains, Henan, Qinghai, Ningxia, Sichuan, Guizhou, Hubei, Dan, etc..
(1) Origin: Changbai Mountains, Henan, Qinghai, Ningxia, Sichuan, Guizhou, Hubei, Dan, etc..
(2) exports to the country: the United States, Japan, Korea, and some European countries.
(3) Specification:
(1)abrasive particle size and composition by GB/T2477-83.Abrasive grain size determination by GB/T2481-83.
GB / T 9258.1-2000 | coated abrasives size analysis Part 1: Grain size
GB / T 9258.2-2008 | coated abrasives size analysis Part 2: coarse grain P12 ~ P220 Determination of particle size
GB / T 9258.3-2000 | coated abrasives size analysis Part 3: Powder P240 ~ P2500 Determination of particle size
Specific physical and chemical indicators
The proportion of the project
SiC Fe2O3 F.C specific weight
1 .≥ 97% ≤ 1.2% ≤ 0.3% 3.2g/cm3
2. ≥ 90% ≤ 1.5% ≤ 0.5%
1 .≥ 97% ≤ 1.2% ≤ 0.3% 3.2g/cm3
2. ≥ 90% ≤ 1.5% ≤ 0.5%