What are the classifications of silica sol

Classification of silica sol

Silica sol can be divided into small particle size silica sol, conventional particle size silica sol and large particle size silica sol according to the particle size. The silica particle size of small particle size silica sol is about 5nmto20nm; the particle size of conventional particle size silica sol is 20nm-50nm; the particle size of large particle size silica sol is 50nm-150nm.

Silica sol can be divided into lowconcentration silica sol, regularconcentration silica sol and highconcentration silica sol according to its silica content. Generally, silica sol with a concentration of less than 20% is called a lowconcentration silica sol, a silica sol with a concentration of 20%-40% is called a regular concentration silica sol, and a silica sol with a concentration greater than 40% is called a highconcentration silica sol, and highconcentration silicasol is also called a high-concentration silica sol. Solid silica sol.

Silica sol can be divided into acidic silica sol, neutral silica sol and alkaline silica sol according to its pH value. Among them, alkaline silica sol is the most common and stable.

According to its ion purity, silica sol can also be divided into ordinary purity silica sol, highpurity silica sol and electronic grade high purity silica sol. Usually, the metal ion content in ppm level is highpurity silica sol, and the metal ion content in ppb level is electronic grade high-purity silica sol.

Silica sol can also be classified according to the preparation method and application, such as: modified silica sol, silica sol for catalyst, silica sol for CMP polishing solution, etc.