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Colloidal silica, also known as silica sol, is an aqueous dispersion of amorphous silicon dioxide nanoparticles (SiO₂). The particles consist of silicon and oxygen atoms and are finely distributed in water with sizes in the nanometer range. Due to their small particle size, Brownian motion, a physical phenomenon in which small particles in a liquid or gas constantly and irregularly jitter back and forth, and electrostatic stabilization, they remain permanently colloidally stable and do not settle.
The silicon dioxide particles are characterized by a high specific surface area, very small particle sizes in the nanometer range, high purity, and good colloidal stability. MATSEN CHEMIE AG offers a wide range of variants and options for a variety of applications.
Colloidal silica is used, among other things, as a polishing agent in the electronics and semiconductor industry, as a clarifying and stabilizing agent in wine and beer production, in the chemical industry as a carrier substance for catalysts, and in the paper industry, for example in the manufacture of paper bags and specialty papers.