Colloidal silica, also known as silica sol, is a type of colloidal suspension made up of very fine, spherical particles of silica suspended in a liquid medium. The size of the particles in a colloidal silica solution is typically in the range of 10-100 nanometers. The size of the particles can be controlled by adjusting the conditions of the synthesis process, such as the pH and the concentration of the reactants.
Large particle size colloidal silica is a type of colloidal silica that has particles with a larger size than typical colloidal silica. The size of the particles in large particle size colloidal silica can be in the range of 100 nanometers to several micrometers. The properties of large particle size colloidal silica may differ from those of typical colloidal silica due to the larger particle size.
There are several uses for colloidal silica, including as a abrasive, a polishing agent, and a thickening agent. Large particle size colloidal silica may have specific applications due to its larger particle size. For example, it may be used as a filler in certain types of coatings or as a reinforcing agent in composite materials.
Colloidal silica/Silica sol is a kind of colloid which is formed by nm-grade particles SiO2, dispersed in water. It is odorless, tasteless and nontoxic and its chemical molecular formula is mSiO2·nH2O.
1. The colloid particles are minute, and the particle size can be controlled according to customers' requirements.
2. Colloidal silica/Silica sol has relatively large specific surface area, and high heat-resisting performance (1500-1600"C).
3. With low viscosity, it can soak the places where water soaks; therefore, it presents excellent dispersion and permeability.
4. When the moisture contained in silica sol is evaporated, the colloid grains firmly adhere to the material surface and the combination of silicon and oxygen is then formed between grains. It is a good adhesive.