Colloidal Silica

Identification of agglomerates and aggregates in colloidal silicic acid

Silica sol, also known as colloidal silicic acid, is a stable suspension of spherical silicon dioxide (SiO2) nanoparticles in a liquid, that are hydroxylated on the surface. Colloidal silicic acid is found in almost all industrial sectors. The applications range from surface treatment in the paper industry, to use as a polishing agent in the electronics industry and use as an additive for varnishes, coatings and paints to improve weather and abrasion resistance. It is also a common additive in cosmetics and in the food industry. The mean particle size and distribution width define the field of application of the SiO2 particles. Typical sizes range from 1 nm to 100 nm.

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