Overview of Fumed Silica

Fumed silica is a nano-scale white powder generated by high temperature hydrolysis of silicon halide in a hydrogen-oxygen flame, commonly known as fumed silica, which is an amorphous silica product with a primary particle size of 7~40nm. The aggregate particle size is about 200-500 nanometers, the specific surface area is 100-400 m2/g, the purity is high, and the SiO2 content is not less than 99.8%. The untreated fumed silica aggregates contain a variety of silanol groups.

Overview of Fumed Silica

Fumed silica (CAS No. 112945-52-5), also known as fumed silica, because it is produced in a flame, by the fusion of tiny droplets of amorphous silica into branched, chain-like , three-dimensional secondary particles, and then condensed into tertiary particles. The resulting powder has very low bulk density and high surface area. When used as a thickener or reinforcing filler, its three-dimensional structure leads to increased viscosity, thixotropic behavior. It is an amorphous silica product, the primary particle size is between 7~40nm, the aggregate particle size is about 200~500nm, the specific surface area is 100~400m2/g, the purity is high, and the SiO2 content is not less than 99.8%. Untreated fumed silica aggregates contain a variety of silanol groups.

Application of fumed silica

Fumed silica is used in powders as a general purpose thickener and anti-caking agent (free-flowing agent). Like silica gel, it can be used as a desiccant. It is used in cosmetics due to its light diffusing properties. Fumed silica is used as a lightweight abrasive in products such as toothpaste. Other uses include fillers in silicone elastomers and viscosity modifiers in paints, coatings, printing inks, adhesives and unsaturated polyester resins.

Applications in Paints and Coatings

Fumed silica is widely used in paints and coatings as a rheological additive, which can effectively prevent the sedimentation and delamination of pigments and fillers, improve the weather resistance and scratch resistance of coatings, and improve the bonding strength of coatings and substrates. .

Applications in Fertilizers and Feeds

Fumed silica has strong adsorption and hygroscopicity, which can promote the free flow of powders such as fertilizers and feeds, facilitate the transportation and storage of powders, and prevent them from getting wet.

Application in pesticides and medicine

Fumed silica has the characteristics of small particle size, large specific surface area, strong adsorption performance and easy suspension. It can absorb a large number of water molecules in water, expand into extremely fine particles, and form a stable suspension. Taking advantage of these characteristics, it can be used as the carrier of pesticide wettable powder, granule, water dispersible granule, dispersant and thickener of suspending agent; at the same time, adding fumed silica into medicine can be used as anti-caking agent, Drug carriers and excipients to achieve the purpose of prolonging drug efficacy.

Applications in Adhesives and Sealants

The excellent reinforcing, thickening and thixotropic properties of fumed silica can prevent the precipitation of adhesives and sealants during storage and sag during curing, improving their tear strength and bond strength.

Fumed silica price

The price of fumed silica will vary with factors such as fumed silica production cost, transportation cost, international situation, exchange rate, and market supply and demand. Tanki New Materials Co., Ltd. aims to help various industries and chemical wholesalers find high-quality, low-cost nanomaterials and chemicals by providing a full range of customized services. If you are looking for fumed silica powder, please feel free to send an inquiry for the latest price of fumed silica.

Fumed silica supplier

As a global supplier of fumed silica powder, Tanki New Materials Co., Ltd. has extensive experience in the performance, application and cost-effective manufacturing of advanced engineering materials. The company has successfully developed a series of powder materials (including boron carbide, aluminum carbide, titanium carbide, etc.), high-purity targets, functional ceramics and structural devices, and provides OEM services.