colloidal solution formed by uniform dispersion
- Packaging:
- 20kg, 25kg, 500kg
- Supply Ability:
- 10000 Ton/Tons per Month
- Port:
- Qingdao,Shanghai
Product Description
Silica sol &Colloidal silica
Silica sol is a network structure formed by countless micelles, so it has a large specific surface area, high adsorption, and its special high dispersion, high fire resistance and heat insulation and other excellent properties are widely used in precision casting industry, textile industry, Catalytic industry, papermaking and coating industry.
Specification
| Content(%) | Na2O(%) | PH value | Density(g/cm3) | Viscosity(mPa.s) | Partical size | Shelf life |
| 29-31 | ≤0.4% | 9.0-11.0 | 1.19-1.21 | ≤10 | 8-20 | 24 months |
Application
Applications in the materials industry
In the material industry, silica sol as a new material attracts attention for its excellent fire resistance and acid resistance. After the ceramic acid-resistant container is treated with silica sol prepared by the reaction of sulfuric acid and silicic acid containing 24% silica, it will not be leached and can increase the pressure.
The thin shell made of small particle size silica sol instead of ethyl silicate has high strength and good smoothness, which can greatly improve the quality of castings and the precision of dimensions, reduce costs and improve operating conditions.
Adding silica sol to the CO2 type coating agent can improve the ductility and increase the strength of the sand mold. Silica sol can also be used as a binder for acid-resistant cement, various thermal insulation materials and silicate materials. It has the characteristics of strong adhesion, acid resistance and high temperature resistance, and is widely used in ceramics and refractory materials industries. A big problem on the surface of Cast Steel is that a few steel ingots often stick to the mold and bottom plate, which affects the quality of metal products.
If silica sol and refractory powder (such as silica, alumina, zirconia, iron oxide, etc.) are mixed to coat the surface of heat-resistant and corrosion-resistant containers such as steel ingot molds and iron molds, this high-temperature protective layer coating can withstand high temperature 1570 ~1630℃, can protect the working surface of the casting mold and the bottom plate, greatly reduce the loss of the mold, and make it demould well.
If silica sol is mixed with amines, thiourea, zinc powder and other materials to make paint, it can be used as steel surface protection material, and its performance, especially rust resistance, greatly exceeds that of lithium zinc silicate paint.
Package
FAQ
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Product Categories : Inorganic Chemicals > Oxide