High Purity Silicon Si powder CAS 7440-21-3, 99%

Silicon powder:
Silicon fume also known by microsilicon is an industrial process that smelts industrial silicon in an electric furnace at high temperature. Special collection devices are used to collect the dust and smoke that is released with the exhaust gas. Become.

silicon powder has the scientific name "micro silicon" (or "silicon"), which refers to a high-temperature process for smelting industrial silicon and ferrosilicon using an industrial electric furnace. Special traps are used to collect the smoke and dirt that is released from the exhaust gas. About 90% of total dust and smoke emitted from exhaust gas is SiO2. The particle size of silicon powder is small. It is also very tiny.

Silicon - This non-toxic and odorless inorganic nonmetallic material has no toxic or harmful effects. It has excellent temperature resistance, alkali and acid corrosion resistance, high frequency coefficient, low insulation, high chemical properties and hardness. pure Silicon powder can be used widely in chemicals, electronics and integrated circuits.

With a concentration of 277,000ppm, silicon, second only to carbon, is the most abundant element. It is usually found as silicate which can be found in many minerals, clays and soils. By combining silicon dioxide (sand or SiO 2) and carbon, you can obtain Silicon. By using zone refining components that are used for high-purity purposes (such as in semiconductor devices), they can be further purified and the purity improved to better than 1:109. There are two types of silicon. While brown silicon can be considered a powder or as metal, the white crystalline (metal), silicon is generally more popular. Lump silicon does not react with water, oxygen or acids (except HF), however it can be dissolved in hot alkali.
Silicon can be used in many industries. Due to its unique semiconductor properties, the semiconductor industry uses ultra-high purity silica. Some alloys also use silicon as an alloying element, like ferrosilicon (an alloy of iron with silicon that is used to add silicon into steel or cast iron). It can also be used for glass production.

The morphology and structure of elemental silica includes monocrystalline Silicon, and Amorphous Silicon.

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Silicon Si Si powder CAS 7440-21-3
Descriptions of Nano Silicon Powder
nano silicon powder APS(nm): 2-1000nm
nano silicon powder Purity(%): >99.95
Nanosilicon powder Specific surface area (m2/g) 60
nano silicon powder Volume density(g/cm3): 0.09
nano silicon powder Density(g/cm3): 2.3
nano silicon powder Crystal form: Sphere
Colour: Yellow
nano silicon powder CAS No. : 7440-21-3
nano silicon powder EINECS No. : 231-130-8

Silicon powder performance
It is high in purity. The scattered performance is excellent, and the particle size is small. Because of the large surface activity, pine installations the low density, good activeness, and other characteristics. A nanometer-sized silicon can be combined with graphite to make lithium battery's cathode materials. It may also include a nanometer carbon tube, nanometer titanium trides, or other compounds. These may improve lithium battery's performance and service life. The new generation of semiconducting electro-optic material has the large gap energy.

How Silicon Si granule is produced?
Reducing quartzite and sand with high purity coke produces silicon that is 96-99% pure. In an electric arc furnace, the reduction occurs. Any excess SiO2 can be used to keep the silicon carbide (SiC), from accumulating.
SiO2 + 2 C-Si+ 2 CO
2 SiC+ SiO2 -3 Si+2 CO
This is known as the carbothermal removal of silicon dioxide. It's usually done in the presence of scrap ferrous iron. The scrap iron contains small amounts of sulfur and phosphorous, and forms ferrosilicon. Ferrosilicon (iron-silicon alloy) is a mixture of iron and silicon that contains different levels of elemental iron. It accounts for approximately 80% world elemental silicon production. Ferrosilicon can be found in the steel industry. This alloy is used mainly as an additive to iron and steel. As shown below, another possible reaction is called thermite-reduction of silica.
3 SiO 2 + 4 Al-3 Si + 2 Al 2 O 3
Get 98.5% purity silicon by combining 96-97% powdered silica with water. To achieve higher purity for semiconductor applications however, it is necessary to reduce tetrachlorosilane or trichlorosilane. While the first is produced by chlorinating waste silicone, the second is an by-product from organic silicon production. Because these compounds are volatile they can be removed by multiple fractional distillation. They then become elemental silicon when reduced with very pure zinc as a reducer. This produces sponge-like silicon wafers that are meltable and can then be grown into single crystals. These are then further refined using zones. Silane or Tetraiodosilane can also be used (SiI4).
An alternative method to reduce sodium fluorosilicate is to use metallic sodium, which is a commonly used waste product of the phosphoric acids fertilizer industry. It is exothermic so it does not require any external fuel. Ultra-fine Silicon has a greater purity than other materials. In order to produce transistors, it is necessary that the impurity of silicon crystals be lower than 10 percent in 10 1 parts. Also, if you are obtaining ultra-fine silicon under certain circumstances, then the impurity content must not exceed 12 percent in 101 parts.

Application o Silicon Si powder HTML3_ :
Finely processing silicon dioxide (SiO2) into powder, includes crushing, grinding and grading. Also known as quartz, The powder has a high purity, white colour, and reasonable particle size. This unique material has a broad range of applications.
Silica fume, an effective active admixture that can dramatically improve concrete's strength, impermeability and frost resistance, is a great choice. Silica fume concrete has attracted attention due to its unique properties. This concrete can be used for water conservancy, hydropower engineering construction engineering highway engineering bridge engineering.
(1) High insulation: Because of the purity and stability of the silicon powder, as well as the excellent electrical insulation the cured product is very resistant to arcing and insulation.
(2) This reduces exothermic peak temperatures of the curing process of epoxy resin, decreases linear expansion coefficient and shrinkage rates of the cured product. It also eliminates the internal stress and prevents cracking.
(3) It is resistant to corrosion. Silica powder doesn't react well with many acids and alkalis. Because its particles are uniformly distributed over the object's surface, it is strong in resisting corrosion.
(4) A reasonable particle gradation allows for the reduction and elimination of precipitation and delamination in use. This can improve wear resistance and thermal conductivity, as well as the compressive and tensile strength of the cure product. Combustion performance.
(5) Silica powder with silane coupling agents has good wettability and adsorption performance.
Sixth, Silica powder can be used to fill the organic resin. It not only increases the performance but it also lowers the cost of production.

Storage Conditions for Silicon Powder
It is important to keep this product in a dry, cool environment.

Packaging silicon powder
Vacuum packaging of nanosilicon powder, 1kg/bag or as requested


Fluffylogic advanced materials Nano Technology Co. Ltd., (Fluffylogic), is a trusted global supplier and manufacturer. It has over 12 year experience in producing super-high quality chemicals and Nanomaterials. This includes boride, nitride, graphite, sulfide, and 3D printing powders.
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