Key Features
Optical-grade purity (99%+)
Precise particle size control
Refractive index: 1.54-1.55
Ultra-low metal impurities
Technical Specifications
| Parameter | Specification |
| Purity | ≥99% (tested 99.3%-99.8%) |
| Particle Size (D50) | 0.5μm-25μm (customizable) |
| Refractive Index | 1.54-1.55 (589nm) |
| Density | 2.65 g/cm³ |
| Mohs Hardness | 7 |
| Whiteness | ≥90% |
| Moisture Content | ≤0.2% |
| Metal Impurities | Fe≤50ppm, Al≤30ppm |
| Item | Unit | Typical Values |
| Exterior | / | white powder |
| Density | kg/m³ | 2.65 ×103 |
| Moh's hardness | / | 7 |
| Coefficient of linear expansion | 1/k | 14×10-6 |
| Pyroconductivity | w/k.m | 12.6 |
| Refraction coefficient | / | 1.54 |
Applications
▸ High-end Optical Coatings: AR/VR lenses, camera lens coatings
▸ Electronic Encapsulation: IC packaging, EMC epoxy molding compounds
▸ Specialty Ceramics: Structural ceramics, electronic ceramic substrates
▸ Polymer Composites: Silicone rubber, engineering plastic reinforcement
Packaging & Shipping
25kg/aluminum foil bag (moisture-proof + anti-static)
500kg/pallet (customizable ton bags available)
Third-party inspection supported
Certifications
ISO 9001:2015 Certified
Compliant with RoHS/REACH
FAQ
Q: Can you provide classified particle sizes?
A: Yes, available in 0.5-5μm / 5-15μm / 15-25μm grades.
Q: What is the MOQ?
A: 100kg for standard grades, samples available (1kg trial pack).
Why Choose Us?
✓ 5+ years of silica powder manufacturing experience
✓ Monthly capacity: 300 tons
✓ Technical collaboration with the Chinese Academy of Sciences
✓ Free technical support for customized solutions
