Combining Angular Strength with Spherical Flow — Balanced Round-Corner Silica
Round Corner Silica Powder is a hybrid filler produced by rounding the corners of angular silica, delivering near-spherical flow, low resin viscosity, and excellent packing. It offers superior cost-performance compared to fully spherical grades, and is available in crystalline SN-YJG and fused SN-YRG grades — widely used in CCL, conductive pastes, industrial coatings, and high-wear composites.
Key Features
- 🟢 Round-Corner Shape — Rounded corners deliver near-spherical flow performance
- 💰 Excellent Cost Efficiency — 20–40% cost reduction versus spherical silica with similar performance
- 🔧 Two Grade Lineup — Choice of crystalline SN-YJG and fused SN-YRG
- 🧬 High Loading — Round-corner structure minimizes viscosity rise at high loading
- 🛡️ Excellent Wear Resistance — Angular strength combined with spherical smoothness
- 📐 Custom PSD — D50 1–40 µm supplied per requirements
Technical Specifications
| Item | Value |
|---|---|
| Appearance | White round-corner powder |
| SiO₂ Purity | 98.0–99.9 % (SN-YJG) / 99.0–99.95 % (SN-YRG) |
| Shape | Round Corner |
| Whiteness / Mohs (SN-YJG) | 90 Min / 7 |
| Expansion / PH (SN-YRG) | 0.5×10⁻⁶ / 5–8 |
| Mean D50 | 10–50 µm (customizable) |
| Packaging | 20 kg bag · 500 kg bulk · OEM |
| Country of Origin | China |
Product Lineup
- SN-YJG · SN-YJG · Crystalline Round-Corner Silica Powder — Crystalline Round-Corner
- SN-YRG · SN-YRG · Fused Round-Corner Silica Powder — Fused Round-Corner
Main Applications
CCL / PCB Substrate · Conductive Paste · Industrial Coatings · Wear-Resistant Composites
Particle size, purity, surface treatment and packaging can be customized to your specification. Contact us for samples, TDS and quotations.