Colloidal silica is suspension of fine amorphous, nonporous, and typically spherical silica particles in a liquid phase. The liquid is denser than water and has been stabilized electrostatically to allow the particles to stay suspended in the solution. There are many grades of colloidal silica, but all of them are composed of silica particles ranging in size from about 3 nm up to about 150 nm. These particles may be spherical or slightly irregular in shape, and they may be present as discrete particles or slightly structured aggregates. These particles may also be present in a narrow or wide particle size range - depending on the process in which they were created.
Silica sol as an applicable precursor could be used in lots of industrial applications, such as:• ConstructionUsed across the construction industry for increased durability and strength in concrete and cementing operations and ground consolidation.• FoundryEnabling precision, strength, safety and reliability in the foundry industry such as precision investment casting and refractory materials.• PolishingCreating nearly defect-free, flat surfaces on silicon semiconductor and sapphire wafers, and optical lenses.• CoatingIts application in coating industry includes decorative coatings, inorganic & insulation coatings, non-stick coatings, paper, inkjet & photo, pigment & fillers, plastic films, protective coatings, wood coatings are prolonging open-time, improving hardness and durability as well as improving anti-soiling properties.• Other applicationsIn addition to stated applications, colloidal silica can be used in adhesives, beverage clarification, catalysts, cleaning products, textiles & fabrics, gel & AGM batteries and water treatment.
It is known as colloidal silica nanoparticles with amorphous structure and the particle size less than 20 nm. Silica concentration in colloid is 16.7 Wt. %.
The main advantage of nano silica is its high specific surface area in compared to micro silica which causes greater interactions in used environment. Silica particles are stabilized easily in nano-dimension which leads to formation more stable colloids.
Do not use cast iron and carbon steel for storing this product. In order to clean the container, follow the brochure. Keep it at the temperatures between 5 to 35 ℃.
Since colloidal silica products consist of amorphous silica and water, they rank as one of the most environmentally-friendly, industrial chemical products. Colloidal silica does not usually present a problem. If you get colloidal silica in your eyes, rinse immediately with water. If problems persist, seek medical attention.It is available in plastic containers 25 Kg and barrels 250 Kg.
Standard Date : 2017/08/30
Expire Date : 2018/08/29