1. What is fumed silica?
fumed silica is an amorphous silica powder obtained by burning silicon tetrachloride and methyl silicon trioxide in an oxygen-hydrogen flame. The minimum particle size of this powder can reach the nanometer level, and it is a commonly used nanoinorganic material.

2. The relationship between vapor phase silica and carbon black
Vapor silica and carbon black have many similarities. They are both small powders with very high specific surface area, which makes them have strong surface activity, good compatibility and dispersion, and are suitable for Added as a filler to various materials such as: plastics, rubber, paints, which is why their names are similar.
The difference between fumed silica and carbon black is that carbon black is amorphous carbon, while fumed silica is amorphous silica, and their compositions are completely different.

3. Nine major uses of fumed silica. The primary particle size of fumed silica is between 7 and 80nm. The specific surface area is generally greater than 100㎡/g. It has nano-effects and exhibits various excellent properties in the material. Mainly Used as an additive and filler, it has a wide range of uses and can add many properties to the base material that it does not have on its own.
Filling and reinforcing effect: Adding fumed silica to the matrix material can improve the tensile strength, modulus and other mechanical properties of the material.
Flame retardant and smoke suppression: The combined use of vapor phase silica and flame retardants can help improve the flame retardant effect of the material and reduce the amount of smoke produced during combustion.
Flow-enhancing effect: Vapor-phase silica can enhance the fluidity of dispersed particles in the dispersion system and prevent particles from solidifying and settling.
Thickening effect: Adding fumed silica to coatings and inks can make the coating reach the desired viscosity.
Decolorization effect: Similar to carbon black, the high surface energy of gas phase silica provides a strong adsorption effect and can absorb colored impurities in liquids.
Catalyst carrier: Vapor phase silica can be evenly dispersed in solvents and matrices. Using gas phase silica as a carrier to carry the catalyst into the system helps to improve the activity and efficiency of the catalyst.
Matting effect: Light will be refracted when passing through the phase interface between fumed silica and matrix material, reducing the reflective effect of the material.
Defoaming effect: Adding gas phase silica to the fluid can reduce the generation of bubbles.
Polishing agent: Vapor phase silica is hard and has small particle size. It is similar to a whetstone and can be used for polishing the surface of materials. In addition, fumed silica has many different uses and is used in medicine, research, chemical industry, daily necessities, cosmetics and other fields.

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