LUDOX® SM-AS

LUDOX® SM-AS is an alkaline, aqueous dispersion of synthetic amorphous silica with a particle size of 7 nanometers.  The silica particles carry a negative charge and work well to bind metals and oxides including aluminum, iron, and siliceous materials used in ceramics manufacturing.   LUDOX® SM-AS is an effective binder for ceramics applications requiring extreme heat resistance.  LUDOX® SM-AS is stabilized with ammonium instead of sodium and therefore is more stable at ultra high temperatures than sodium stabilized colloidal silica.  LUDOX® SM-AS can also be used as a cross linker and adhesion promoter in coatings and adhesives to improve durability, heat resistance,  and adhesion to metal and glass surfaces. The electrostatic nature of LUDOX® SM-AS also makes it an efficient flocculant for waste water treatment and papermaking applications where positively charged contaminants like proteins must be coagulated and removed.  In concrete densifiers, LUDOX® SM-AS provides the silica necessary to interact with remaining calcium hydroxide in cement to create new calcium silica hydrate and increase concrete density.