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

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 dust and smoke that escapes as exhaust gas. About 90% of total dust and smoke emitted from exhaust gas is SiO2. The particle size of silicon powder is small. Its average size is just a nanometer.

Silicon a non-toxic and odorless inorganic nonmetallic material. Because of its excellent temperature resistance and acid and alkali resistance, high reflection coefficient, low expansion and stable chemical properties, pure Silicon powder can be used widely in chemicals, electronics and integrated circuits.

The second most abundant element is silicon, which has a concentration of 277,000ppm. You can find it in silicate 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 (like those 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 metal, the white crystalline (or metallic) version of silicon is far 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 or nanometer-sized titanium nitrides. These compounds may improve lithium battery’s performance and service life. The new generation of semi-conducting 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 is scrap iron which has a small amount phosphorus, and thus 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 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
However, a leaching of 97-97% powdered silica with water will yield approximately 98.5% purity for chemical industries. 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 (SiI4) can also be used.
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) is done by crushing, grinding and grading. Also known as quartz, this process results in the production of Silicon Powder. 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) 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 and helps to prevent 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) A reasonable particle gradation allows for the reduction and elimination of precipitation and delamination in use. This can improve wear resistance, tensile strength, compressive strength, thermal conductivity, as well as the product’s resistance to heat. 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 and clean environment.

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


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