Fumed Silica Basic Information
- CAS_ No.: 10279-57-9
- EINECS_ No.: 238-878-4
- Molecular Formula：SiO2·nH2O
- Molecular Weight：78.1
Precipitated Silica And Fumed Silica
Fumed Silica Manufacturer & Supplier In China
Located in China, Beatus is leading manufacturer and supplier for fumed silica. Our high purity fumed silica products are vastly applied in various industries. They are exported to over 40 countries.
Fumed silica can be defined as finely divided amorphous silicon dioxide particles produced by high temperature in an oxygen-hydrogen flame
Fumed silica is a pure, relatively reactive source of silica. It is particularly attractive for alkali-free synthesis because its sodium content is very low. However, the powder is extremely light and fluffy, and as such, is increasingly difficult to handle as the scale of a particular zeolite synthesis reaction increases. Fumed silica is also somewhat more expensive than other silica sources, such as precipitated silica.
Since its first production in the early forties of this century, fumed silica has found widespread use in industrial applications.
Due to its pyrogenic manufacturing process by combustion of silicon tetrachloride in an oxygen-hydrogen flame, fumed silica offers a variety of fascinating properties. It consists of finely dispersed amorphous silicon dioxide and its surface is covered by highly reactive silanol groups which are available for chemical reactions.
Additionally, fumed silica shows a space-filling particle structure related to a high surface area and lacking micropores. These characteristics enable fumed silica to act as a free flow additive in powder-like solids, as a thickener in various liquids and as a powerful reinforcing filler in elastomers.
How is fumed silica manufactured?
Fumed silica is a type of synthetic amorphous silicon dioxide, produced by burning SiCl4 in an oxygen-rich atmosphere. It is made by flame pyrolysis of silicon tetrachloride or from quartz and vaporized in a 3000°C electric arc. The particles feature a surface area of 50–600 m2/g, a primary particle size of 5–50 nm, and a density of 160–190 kg/m3. The compound consists of amorphous silica fused into three-dimensional secondary particles. The chains and branches finally cluster into tertiary particles, providing the end product with low bulk density and high surface area.
5 Key Fumed Silica Advantages & Properties
- Fumed silica has a high surface area and a porous structure, making it an ideal additive for many applications.
- Fumed Silica is safe to use and has low toxicity.
- Fumed Silica is environmentally friendly and does not contribute to global warming.
- Fumed Silica is non-corrosive and does not react with other chemicals.
- Fumed Silica is a versatile product that can help to improve the quality and performance of products in a number of industries.
Manufacturer for Three Types of Fumed Silica
Hydrophilic Fumed Silica
Hydrophobic Fumed Silica
Food Additive Fumed Silica
High Standard Fumed Silica Product List
Typical Applications
Fumed silica’s properties and porous structure make it an ideal additive for a wide range of applications. Some of the primary uses of fumed silica include:
- As a thickener or filler in paints, coatings, and adhesives
- In food and beverage products as an anticaking agent
- In pharmaceuticals and cosmetics as a bulking agent or stabilizer
- In the manufacture of semiconductors and optical fibers
- In the production of rubber and plastics
- As an extender in cement and concrete
- In the manufacture of ceramic tiles
Silica SiO₂ Manufacturer & Supplier In China
If you are looking for reliable manufacturer & supplier who is able to supply high standard Silica SiO₂ from China, please don't hesitate to contact Beatus.