Aerosil

Aerosil is a fumed silica product developed in 1942 by Degussa AG in Germany.

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Properties

Aerosil is pure silicon dioxide, made from vaporized silicon tetrachloride, oxidized in high-temperature flame with H₂ and O₂. Aggregated amorphous nano-sized primary particles gives free flow to powder materials. It gives thickening effect and thixotropy by dispersing to liquid materials. Standard hydrophilic products are made of primary particles from 7 nm to 40 nm, and also these products are surface modified to hydrophobic.

Applications

• As free-flow agent: toner, food, pharmaceutics.
• As rheology controller: paint, coating, adhesives, sealant, plastics.
• Others: film, fiber, ceramics, catalyst, glass.