Colloidal Silica

We export a variety of colloidal silica which is composed of nano-grade silica dispersed in water. It is available in different particle sizes, specific surface areas, pH values, surface charges and so on. The colloidal silica can be widely used in coatings, casting, catalysts and surface polishing.

Type

Items	ion	Type	SiO2 (%)	Particle size (nm)	pH (25℃)
1	Anionic	Sodium stabilized	15-50	4-78	9-11
		Ammonium stabilized	30-40	14-34	9-10
		Aluminate modified	7-40	2-17	8.5-10.5
		Silane modified	15-40	5-12	8-11
2	Cationic	Chloride stabilized	25-45	17-32	3.8-4
3	Non-charged	Deionized	20-40	9-34	2.4-2.8

Application

1.Coatings
With the properties of anti-soiling, anti-corrosion, high hardness, anti-scratch, colloidal silica is used in building materials, ceramics.

2.Foundry
With the property of high temperature tolerance, colloidal silica is used in the precision investment casting.

3.Catalyst
With the property of high temperature binding capability, colloidal silica helps to increase the mechanical stability of catalyst.

4.Surface Polishing
This colloidal silica can be used for shaping, smoothing, and polishing for polishing tapes.

Product Specifications

Items	SiO2 (%)	Density (g/cm³ ,25℃)	Na2O (wt%)	Particle size (nm)	pH (25℃)	Viscosity (cP, 25℃)
1	30%	1.2	0.35	14	9.6-11	<12
2	30%	1.21	0.5	8	9.8-11.2	<13

Items	SiO2 (%)	Density (g/cm³ ,25℃)	Na2O (wt%)	Particle size (nm)	pH (25℃)	Viscosity (cP, 25℃)
1	40%	1.3	0.35	14	9.5-10.9	<30
2	40%	1.29	0.3	20	9.3-10.7	<20

Shelf life：12 months