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Eight facts that you may not have known about colloidal silica.
Of all colloidal materials, amorphous colloidal silica is one of the most commonly produced man-made inorganic material due to its high performance.
Colloidal silica is mainly available as aqueous dispersions.
Colloidal silica is most commonly graded by the specific surface area (defined in m2/g). This surface area defines the average particle size.
Colloidal silica with small particle sizes have in general lower solids content compared to colloidal silica with larger particle sizes.
Anionic colloidal silica dispersions are available stabilized with either sodium, potassium, or ammonia. Cationic dispersions are available stabilized with chloride. Products are also available stabilized by removal of ions.
Typical anionic colloidal silicas are stable between a pH of 8 and 11.5, while cationic silicas are stable between a pH of 2 and 4.5.
Colloidal silica's stability and reactivity can be enhanced through various surface treatments including aluminum and silanes.
Colloidal silica has many different functions from an active charge carrier or reacting surface to a physical abrasive or high temperature binder.
Learn more about the industry & applications or functions of colloidal silica.