The difference between Fumed silica and Micro silica fume

Fumed silica, also known as fumed white carbon black, is one of the extremely important high-tech ultra-fine inorganic new materials. It is porous, non-toxic, odorless, pollution-free, and resistant to high temperatures. At the same time, its chemical inertness and special thixotropic properties can significantly improve the tensile strength, tear resistance and wear resistance of rubber products, and the strength of rubber can be improved by dozens of times. Rheology and thixotropy control of liquid systems, adhesives, polymers, etc., used as an additive for anti-settling, thickening, and anti-sag, reinforcement of HCR and RTV-2K silicone rubber, can be used to adjust free flow And as an anti-caking agent to improve powder properties and so on.

Fumed silica is a white, non-toxic, odorless, amorphous inorganic fine chemical product. The atomic particle size is 7-40 nanometers, and the specific surface area is 70-400m/g. It has many functions such as reinforcement, thickening, thixotropy, extinction, anti-ultraviolet and sterilization.

Micro silica fume (also known as "silica fume", Microsilica or Silica Fume), is an amorphous, Powdered silicon dioxide (Sio2). The average particle size of silica fume is 0.1-0.15 μm (micron), which is a few hundredth of the average particle size of cement. The specific surface area is 15 -27 m2/g, and it has extremely strong surface activity.

Product application: high-strength concrete, amorphous refractory materials, dry-mixed (ready-mixed) mortar, high-strength non-shrinkage grouting material, wear-resistant industrial floor, repair mortar, polymer mortar, thermal insulation mortar, impervious concrete, self-leveling concrete , Concrete compacting agent, concrete preservative, cement-based polymer waterproofing agent; reinforcement of rubber, plastic, unsaturated polyester, paint, coating and other polymer materials, modification of ceramic products, etc.