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 electric furnace. Special traps are used to collect the exhaust fumes and dirt. 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 a non-toxic and odorless inorganic nonmetallic material. Because of its excellent temperature resistance and acid and alkali resistance, high reflection coefficient, high insulation and low expansion, high chemical properties and hardness, pure Silicon powder can be used widely in chemicals and electronics.

The second most abundant element is silicon, which has a concentration of 277,000ppm. It is usually found as silicate which can be found in many minerals, clays, soils. By combining silicon dioxide (sand or SiO2) with carbon, you can obtain Silicon. By using zone refining components that are used for high-purity purposes (such semiconductor devices), they can be further purified and their purity improved to better than 1:109. There are two types of silicon. While brown silicon can be considered a powder or 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 to steel and 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 area, 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 high 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 ferrosilicon, which is a mixture of scrap iron and phosphorus. 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 primarily 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
The chemical industry can use 98.5% of pure silicon produced by leaching 97-97% of the powdered silicon with water. To achieve higher purity for semiconductor applications however, it is necessary to reduce tetrachlorosilane or trichlorosilane. While the first is produced by bleaching waste silicon, 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 per 101 part.

Application o Silicon Si powder HTML3_ :
Finely processing silicon dioxide (SiO2) into powder, includes crushing, grinding, polishing, and grading. Also known as quartz, The powder has a high purity, low particle size, and is white in color.
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) The exothermic peak temperature for the curing of epoxy resin can be reduced, the linear expansion coefficient and shrinkage rates of the cured products can also be decreased. This reduces the internal stress in the product, which prevents cracking.
(3) It is resistant to corrosion. Silica powder doesn't react well with many acids and alkalis. Because its particles are evenly covered with the object's surface it is strong in resisting corrosion.
(4) Particle gradation should be considered reasonable. This can help reduce or eliminate precipitation and/or delamination while in use. 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


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