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Aerosil is a powdery substance that is produced by grinding or crushing solid materials into very fine particles. Aerosil particles are typically less than 1 µm (0.000039 in) in diameter.
Aerosil is also known as fumed silica or Pyrogenic silica in the market. Pyrogenic silica is so named because it is produced in a flame.
Due to its large surface area, Aerosil combines well with other materials and improves their properties. Fumed silica is suitable as a filling and thermal insulation material due to its light weight.
It is also resistant to corrosion and other chemical agents due to its stable chemical properties.
How to use Aerosil depends on its type; It means that it is hydrophobic or hydrophilic. In the water-friendly grade, this product is dissolved in water before use and then added to the rest of the ingredients. If you are not familiar with how to use this substance, in a complete article, Shimi Afsoon will introduce you to how to use Aerosil, which is recommended to be read.
According to its different grades, the solvent of Aerosil can be water, ethylene glycol or other chemical solvents.
Buying Aerosil and filler from Shimi Afsoon
Shimi Afsoon importer of all kinds of Aerosil and filler is ready to provide this product with the best price and quality while receiving orders from dear customers and send it to different cities as soon as possible through reliable transportation system.
Fluctuations in exchange rates and many parameters affect the price of Aerosil daily. The price of this material varies depending on the purchase amount and the type of packaging. Shimi Afsoon has always tried to keep the price of fumed silica cheaper than the market price in addition to maintaining the quality of its products.
Contact us for wholesale price and purchase advice.
Fumed silica is marketed in two grades, industrial and edible.
The dangers of fumed silica include many diseases such as silicosis, lung cancer, chronic obstructive pulmonary disease (COPD), kidney disease, and cardiovascular disorders. If you don’t know anything about these diseases and side effects of this substance, it is better to read the article on the dangers of Aerosil.
Fumed silica is made from the decomposition of burnt silicon tetrachloride or fumed quartz sand, in an electric arc at a temperature of 3000 degrees Celsius. A rich range of silicone products – silicone polymers used in silicone rubbers and sealants, silicone-based antifoams and other active silanes such as ultra-pure silicon metal important in new electronics based on silicon tetrachloride (SiCL4) and methyltrichlorosilane (CH3SiCL3) as the byproduct.
Both products are annealed at 1100°C and produce pure silicon and completely separated silicon dioxide in hydrogen-oxygen flame. Fumed silica is made from a material such as silicon tetrachloride (SiCl4) in continuous flame hydrolysis. In a flame, hydrogen and oxygen (from air) react in the presence of SiCl4.
The formation of SiO2 can be described by the combination of an oxyhydrogen reaction in which water is formed and the hydrolysis of SiCl4 with this water. The formation process of this substance can be expressed in the following simple equations:
2H2 + O2 → 2H2O
SiCl4 + 2 H2O → SiO2 + 4 HCl
General reaction:
2H2 + O2 + SiCl4 → SiO2 + 4HCl
A hydrogen flame containing SiCl4 burns continuously in the reaction chamber. With the formation of water, a spontaneous and small reaction is carried out with SiCl4 in the flame and produces the desired hydrochloric acid gas and silicon dioxide.
Fumed silica forms in a fraction of a second in a flame. A mixture of gases and solids (SiO2 particles) containing hydrochloric acid is produced. This aerosol must first be cooled before being separated into solids and gases in the next step. The solid still contains relatively large amounts of hydrochloride, which is adsorbed on the surface of the particles.
