What is Fumed silica?
Fumed silica can be defined as finely divided amorphous silicon dioxide particles produced by high temperatures in an oxygen-hydrogen flame. Fumed silica, also known as pyrogenic silica because it is produced in a flame, consists of microscopic amorphous silica fused into branched, chainlike, three-dimensional secondary particles, which agglomerate into tertiary particles. The resulting powder has an extremely low bulk density and high surface area. Its three-dimensional structure results in viscosity-increasing, thixotropic behavior when used as a thickener or reinforcing filler.
Fumed silica Properties
Fumed silica has a very strong thickening effect. The primary particle size is 5–50 nm. The particles are non-porous and have a surface area of 50–600 m2/g. The density is 160–190 kg/m3. Fumed silica is made from flame pyrolysis of silicon tetrachloride or quartz sand vaporized in a 3000 °C electric arc. Major global producers are Evonik (who sells it under the name Aerosil), Cabot Corporation (Cab-O-Sil), Wacker Chemie (HDK), OCI (Konasil), Orisil (Orisil) and Xunyuchem(XYSIL). Fumed silica is a universal thickening agent and an anticaking agent (free-flow agent) in powders. Like silica gel, it serves as a desiccant. It is used in cosmetics for its light-diffusing properties. It is used as a light abrasive in products like toothpaste. Other uses include filler in silicone elastomer and viscosity adjustment in paints, coatings, printing inks, adhesives, and unsaturated polyester resins.
What material is fumed silica?
Fumed silica (pyrogenic silica and silicon dioxide) is one of the lightest substances known. Fumed silicas are very light and fluffy and have bulk densities of 3 lbs/cu ft (38 kg/cu m). Silicon metals and alloys are produced in electric furnaces. The raw materials include quartz, coal, and wood chips. Solubility / Solution Stability:2 Fumed silica will form dispersions in water, glycerin, butyl alcohol, mineral oil, and various other liquids, causing them to thicken or form gels. Exposure to silica dust can lead to the development of lung cancer, silicosis (irreversible scarring and stiffening of the lungs), kidney disease, and chronic obstructive pulmonary disease. It is estimated that 230 people develop lung cancer each year due to past exposure to silica dust at work.
Price of Fumed silica
Fumed silica particle size and purity will affect the product's Price, and the purchase volume can also affect the cost of Fumed silica. A large amount of large amount will be lower. The Price of Fumed silica is on our company's official website.
Fumed silica supplier
Mis-Asia is a reliable and high-quality global chemical material supplier and manufacturer. It has over 12 years of experience providing ultra-high quality chemicals and nanotechnology materials, including Fumed silica, nitride powder, graphite powder, sulfide powder, and 3D printing powder. If you are looking for high-quality and cost-effective Fumed silica, you are welcome to contact us or inquire at any time.
