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What is the difference between Silica Fume and Silicon Metal Powder?

Silicon Metal

Silicon Metal Powder

It is a powdered silicon powder made by grinding and processing silicon metal (industrial silicon).

Silicon metal is also known as crystalline silicon or industrial silicon, and its main use is as an additive for non-iron based alloys. Industrial silicon’s is also used as an alloying agent for demanding silicon steel, a deoxidizer for smelting special steel grades and non-iron based alloys. After a series of processes, industrial silicon can be drawn into monocrystalline silicon for use in the electronics industry.

Silicon metal powder uses

  1. Silicon metal powder is widely used in refractory materials and powder metallurgy industry to improve the high temperature resistance, wear resistance and oxidation resistance of products. Its products are widely used in steel-making furnaces, kilns and kiln furniture.
  2. In the organosilicon chemical industry, silicon metal powder is the basic raw material for organosilicon polymer synthesis, such as for the production of silicon monomer, silicone oil, silicone rubber anticorrosive agent, so as to improve the product’s high temperature resistance, electrical insulation, corrosion resistance, corrosion prevention, water resistance and other characteristics.
  3. Silicon metal powder is drawn into monocrystalline silicon, processed into silicon wafers are widely used in high-tech fields, is an integrated circuit, electronic components essential raw materials.
  4. Metallurgical casting industry, silicon metal powder as a non-iron-based alloy additives, silicon steel alloying agent, thereby improving steel hardenability. Industrial Silica Fume can also be applied as a reducing agent for certain metals, for new ceramic alloys, etc.

Silica Fume

Silica Fume, also known as microsilica, is the soot recovered from the production of silicon metal or ferroalloys.

Because the silica contained in Silica Fume is very high and the particles are extremely fine, it is widely used not only in the rubber and paint industries, but also in concrete and other industries, and Silica Fume has volcanic ash activity.

Silica Fume Uses

  1. Control the segregation and secretion of concrete materials, reduce or avoid the emergence of honeycomb, pockmark, weak sandwich, cracks and emulsion skin and other defects in concrete.
  2. Improve the compressive strength of concrete. The test proves that silica fume can substantially improve the strength of concrete.
  3. Improve the durability of concrete, and improve the anti-seepage, anti-freezing, anti-abrasion and anti-corrosion properties of concrete
  4. Improve the resistance of concrete to carbonation, for reinforced concrete, the incorporation of silica micropowder can not only improve the bond strength between the substrate and the reinforcement, but also enhance the corrosion resistance of the reinforcement.
  5. Improve the fluidity and dense degree of refractory materials, improve the high temperature strength and thermal shock of refractory materials

Silicon Metal Powder VS Silica Fume

  1. The main component of silicon metal powder is crystalline silicon, which is a powder formed after grinding and is mainly used in China’s refractory industry; the main component of silicon powder is silicon dioxide, which is formed during the production process and is the soot recovered when producing silicon metal.
  2. The color of silicon metal powder is black and not easy to change; the color of silicon powder varies greatly from white to black.
  3. The price of silicon metal powder in the market is relatively high.
  4. Silicon metal powder has low activity, and silicon powder has volcanic ash activity.

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