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Silicon metal is widely used in
metallurgy, chemical industry, electronics and other industries.
In the metallurgical industry, silicon is used as a major
non-ferrous alloy additives.Added to non-ferrous metals, silicon
can enhance the strength, hardness and wear resistance of the
metal. To some extent,it can enhance the performance of the
casting and welding. |
Silicon is a
non-metallic element ,it is grey, metallic color , hard and
crisp. The total silicon content is about 26% of the
earth's crust;Its atomic weight 28.80; density 2.33g/m3; melting
point 1410 ℃; boiling point 2355 ℃; resistivity 2140Ω.m.
Silicon metal is widely used in
the aluminum alloy industry and aluminium profile industry.
Silicon in the chemical industry is
mainly used to produce silicon-based compounds such as silane,
silicone, organosilicon, silicone oil etc
Silicon is also widely used in the
semiconductor, ceramics, carborundum, silicon nitride area
Silicon metal is classified based on the content of iron,
aluminum, calcium which are listed as the primary impurity, and
the major types we can supply as follows:
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#331 |
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Si: |
≥99% |
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Fe: |
≤0.3% |
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Al: |
≤0.3% |
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Ca: |
≤0.1% |
Properties of Silicon Metal
Most metallurgical silicon metal is used as an alloying
agent in the aluminium industry due to its ability to
increase the strength of aluminium. Demand from the
aluminium industry has grown steadily in recent years due to
increased usage of aluminium in structural engineering,
aircraft manufacture and the automotive industry. Aluminium
alloys are lighter and more resistant to corrosion than
carbon-steel and can be made by addition of metals such as
copper, zinc, magnesium, manganese as well as silicon.
Production of Silicon Metal
On a commercial scale metallurgical silicon metal is
produced by the carbothermic reaction of silica (quartz) in
an electric arc furnace using carbon electrodes where the
temperature in the main reaction zone of temperatures
exceeds 1800șC. Commercially produced metallurgical grade
silicon metal is typically Si 98% pure and is notably
produced in China, Russia, Brazil, Norway, South Africa and
USA.
Silicon Metal Application
Silicon metal is important to the electronic industry, as it is the base material used in the manufacture of high purity polycrystalline silicon. Silicon metal can also be the application for the aluminium alloy .Alloying agent (hardener) in iron and aluminum, the production of silicones, an addition to ceramics, welding rods, powder metallurgy, pyrotechnics, ammunition, ordnance, refractories, electronic substrates, cement, vapor deposition, plasma spray, chemical formulations, and grinding wheels. Futhermore ,Silicon metal is an important chemical structure material. Trichlorosilane is the silicon compound most commonly used as the intermediate, although silicon tetrachloride and silane are also used. When these gases are blown over silicon at high temperature, they decompose to high-purity silicon. |
