Fumed Silica
Fumed Silica
Fumed silica is a nano-scale amorphous silicon dioxide with small particle size, large surface area and high surface activity. Excellent thickening, thixotropic, anti-settling and anti-sag. Used in silicone rubber, adhesives, coatings and inks.
Key Features
- Nano-scale amorphous silicon dioxide
- Small particle size, large specific surface area
- High surface activity
- Excellent thickening and thixotropic properties
- Anti-settling and anti-sag
- Reinforcement and anti-caking
- Scratch and abrasion resistance
- Corrosion resistance
- Enhanced adsorption
- Reduced moisture absorption (hydrophobic grades)
- Available in hydrophilic and hydrophobic series
Applications
Product Overview
Fumed Silica in Detail
Fumed Silica (Pyrogenic Silica)
Fumed silica, also known as pyrogenic silica or fumed white carbon black, is an extremely fine nano-scale amorphous silicon dioxide produced by high-temperature hydrolysis and condensation of chlorosilanes in an oxyhydrogen flame. With small particle size, large specific surface area and high surface activity, fumed silica offers excellent thickening, thixotropic, anti-settling and anti-sag properties. It is widely used in silicone rubber, adhesives, coatings, inks, thermal insulation and other industries.
Shanxi Jufeng New Material Technology Co., Ltd. offers two major series of fumed silica: hydrophilic and hydrophobic. The company is a domestic leader in production capacity and deep-processing technology.
Hydrophilic Fumed Silica
Widely used worldwide to meet customers requirements. Applications include:
- Adhesives and sealants
- Agriculture and turf care
- Chemical mechanical polishing (CMP)
- Coatings
- Composites
- Food additives
- Greases
- Pharmaceuticals
- Printing and packaging
- Silicone sealants
- Skin care and beauty care products
Key performance benefits include:
- Anti-settling, anti-thickening and anti-sag
- Scratch and abrasion resistance
- Free flow and anti-caking
- Corrosion resistance
- Enhanced adsorption
- Reinforcement
Hydrophobic Fumed Silica
Applications include:
- Adhesives and sealants
- Agriculture and turf care
- Coatings
- Composites
- Greases
- Silicone sealants
- Skin care and beauty care products
- Toner
Key performance benefits for hydrophobic systems:
- Reduced moisture absorption
- Anti-settling, anti-thickening and anti-sag in polar systems
- Scratch and abrasion resistance
- Free flow and anti-caking
- Corrosion resistance
- Reinforcement
Product Grades
Hydrophobic JF-10
Highly hydrophobic treated precipitated silica surface-modified with polydimethylsiloxane (PDMS).
- Appearance: White fluffy powder
- D50 particle size: 6.5 um
- Carbon content: 3.0-4.0%
- Loss on drying: max 3%
- pH value: min 7
- Bulk density: approx. 90 g/L
Application: Defoamer
Packaging: 20 kg paper bags or 300 kg ton bags
Hydrophobic JF-19
Highly hydrophobic treated fumed silica surface-modified with polydimethylsiloxane (PDMS).
- Appearance: White fluffy powder
- Specific surface area: 110 +/- 25 m2/g
- Carbon content: 3.5-5.5%
- Loss on drying: max 0.5%
- pH value: 4.5-6
- Bulk density: approx. 50 g/L
Applications: Adhesives, sealants, toner, coatings and inks, tile grout
Packaging: 10 kg paper bags or 200 kg ton bags
Hydrophobic JF-30
Highly hydrophobic treated fumed silica surface-modified with hexamethyldisilazane (HMDS).
- Appearance: White fluffy powder
- Specific surface area: 250 +/- 25 m2/g
- Carbon content: 3.0-4.0%
- Loss on drying: max 0.5%
- pH value: 5.5-9.0
- Bulk density: approx. 50 g/L
Applications: Silicone rubber, coatings and inks, toner
Packaging: 10 kg paper bags or 200 kg ton bags
Storage Conditions
Store in a cool, dry, well-ventilated place with the packaging kept sealed. Avoid storing together with volatile chemicals to prevent adsorption.
Technical Data
Typical Specifications
Typical values, not to be used as specification limits. Contact us for detailed Technical Data Sheets.
| Property | Typical Value |
|---|---|
| Hydrophilic Series | Available on request |
| Hydrophobic JF-10 | |
| Appearance | White fluffy powder |
| D50 Particle Size | 6.5 um |
| Carbon Content | 3.0-4.0% |
| Loss on Drying | max 3% |
| pH Value | min 7 |
| Bulk Density | approx. 90 g/L |
| Hydrophobic JF-19 | |
| Appearance | White fluffy powder |
| Specific Surface Area | 110 +/- 25 m2/g |
| Carbon Content | 3.5-5.5% |
| Loss on Drying | max 0.5% |
| pH Value | 4.5-6 |
| Bulk Density | approx. 50 g/L |
| Hydrophobic JF-30 | |
| Appearance | White fluffy powder |
| Specific Surface Area | 250 +/- 25 m2/g |
| Carbon Content | 3.0-4.0% |
| Loss on Drying | max 0.5% |
| pH Value | 5.5-9.0 |
| Bulk Density | approx. 50 g/L |
Note: The data above are typical values obtained under standard test conditions. They are for reference only and should not be used as the basis for product specification. Please contact us for a detailed Technical Data Sheet (TDS) and Safety Data Sheet (SDS).