What is the difference between the grades of silicone?

The difference between the particle size of the silica gel and the pH is the largest. Particle size can also be expressed in terms of specific surface area, that is, the larger the specific surface area, the smaller the average particle size. The average particle size also affects the maximum possible SiO2 content (ie, small particles are only stable in dilute solutions, while larger particles are stable at higher concentrations). Pure silica solutions are anionic, usually sodium or ammonium stable, and have a pH of 9-11. However, by modification with sodium aluminate, the solute can be stabilized to pH 3-4. Cationic silicon solutions are stable at pH 4-5, and deionized solutions are stable at low pH (usually 2-3).

Low Sodium Type Colloidal Silica/Silica Sol

Colloidal silica/Silica sol is a kind of colloid which is formed by nm-grade particles of 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.

Product application: electronics chemicals, paper chemicals, ceramics, sapphire polishing, gallium arsenide, silicon wafer polishing, cement curing agent, refractory materials, etc.