Ammoniacal silica sol is a stable colloidal dispersion of silica nanoparticles in water, stabilized by the presence of ammonia. It is prepared by reacting a source of silica, such as sodium silicate, with an acid to form an acidic silica sol, which is then neutralized with ammonia to form the ammoniacal silica sol.
The ammonia in the sol acts as a stabilizing agent, preventing the particles from aggregating and settling out of solution. Ammoniacal silica sols are commonly used as a binder or adhesive in a variety of applications, including coatings, paints, and adhesives. They can also be used as a polishing agent or as a catalyst support.
The properties of ammoniacal silica sols, such as particle size and stability, can be controlled by adjusting the pH, concentration, and temperature of the sol during preparation. The resulting sols can have a range of properties, including high transparency, high surface area, and high reactivity, making them versatile materials for many applications.
Ammoniacal silica sol is a colloidal suspension of silica particles in water that has been stabilized by ammonia. It has several functions, including:
Binders and Adhesives: Ammoniacal silica sol is commonly used as a binder or adhesive in the production of ceramics, paper, and other materials. It can be added to a mixture to improve its strength and adhesion properties.
Catalysts: Ammoniacal silica sol can also be used as a catalyst in chemical reactions, particularly in the production of zeolites and other porous materials.
Coatings: Ammoniacal silica sol can be used as a coating for various surfaces to provide improved scratch resistance, durability, and water resistance.
Stabilizers: Ammoniacal silica sol can be used as a stabilizer in various formulations to prevent settling or separation of particles.
Ammoniacal Colloidal silica/silica sol is a low density, colloidal silica used as a filler in coating applications. It has negative surface charge and is stabilized with ammonium hydroxide. It has low sodium level, an overall negative particle charge, good binding strength and stability in most applications.
Product application: catalyst support, high gloss photo paper.