Sales of silica sol discuss the main uses of high concentration silica sol

1. Casting

Due to its excellent adhesion, low shrinkage, and relatively complete glass phase transition at high temperatures, high-purity silica sol is preferred. It is widely used as a shell bonding agent in the casting industry.

2. Refractory materials

The silicate refractory fibers mainly made of high-purity silica sol have energy-saving and high temperature resistance properties. Widely used as insulation material in thermal and industrial equipment such as furnaces and kilns. Other amorphous refractory materials using high-purity silica sol as a binder, as they do not introduce various low melting point oxides. Improved usability. And it has the advantages of high demolding strength, stable high-temperature volume, and good resistance to high-temperature thermal shock. In addition, acid resistant cement or ceramics treated with high-purity silica sol. Chemical equipment capable of withstanding strong acids can be prepared, which can prevent acid penetration and withstand high pressure.

3. Coatings

Due to the small size and high surface area of high-purity silica sol particles. A large number of silanol groups on the surface of high-purity silica sol particles interact strongly with metal substrates, inorganic fillers in coatings such as commonly used metal oxides, polymers and lotion substrates. This interaction gives the coating strong adhesion on various substrates. It also gives the coating higher strength and better durability.

The high-purity silica sol is used as the main film-forming material, and the synthetic emulsion (such as styrene acrylic lotion, vinyl acetate resin lotion) is used as the auxiliary film-forming material. A composite exterior wall coating formulated with pigments, fillers, and additives. With unique water resistance, fire resistance, washability, and pollution resistance, it has become a leader in architectural coatings in recent years. A casting coating prepared by mixing high-purity silica sol with refractory powder during the casting of steel ingots. It can effectively prevent the melting of molten steel and the wear of flat plates.