SiO₂ 99.93% · D50 9.96 µm Spherical Fused Silica — high-purity filler verified by KICET analysis (SN-FPO10)
SN-FPO10 is a high-purity spherical fused silica powder produced by melting natural quartz at ultra-high temperature, quenching it into amorphous SiO₂ and spheroidizing the particles.
Laser-diffraction analysis (Horiba LA-950) gives D50 9.96 µm, mean 9.97 µm, mode 10.36 µm, standard deviation 1.38 µm, D10 8.08 µm, D90 11.72 µm and D99 13.21 µm — an extremely narrow, single-peak distribution centered on the 10 µm class. Particles above 15 µm are effectively absent (100% cumulative), minimizing nozzle clogging and scratch defects in dispensing, screen-printing and thin-film coating.
The spherical morphology lowers inter-particle friction in resin and slurry systems, sharply reducing viscosity at a given loading and enabling high-loading formulations for high thermal conductivity and low CTE. Combined with the ultra-low CTE of amorphous fused silica (approx. 0.5–0.6 ×10⁻⁶/°C), low dielectric constant and loss, and excellent chemical stability, it suits semiconductor EMC and underfill, CCL and prepreg, thermally conductive and conductive pastes, precision coatings, engineered stone and composite materials.
Key Features
- 🧪 High Purity SiO₂ 99.93% — Verified by wet and instrumental analysis in KICET report 2024-4540
- ⚪ Spherical Fused Silica — Spheroidized amorphous fused silica — low viscosity, high loading, low stress
- 📐 Narrow Single-Peak D50 9.96 µm — D10 8.08 · D50 9.96 · D90 11.72 µm · std. dev. 1.38 µm
- 🚫 No Oversize Particles — 100% cumulative below 15 µm — suppresses nozzle clogging and scratch defects
- 🌡️ Ultra-Low CTE & Low Dk — CTE approx. 0.5–0.6 ×10⁻⁶/°C with low dielectric constant and loss
- 🛠️ Custom Processing — PSD and optional silane surface treatment adjusted to customer conditions
Technical Specifications
| Item | Value |
|---|---|
| Product Code | SN-FPO10 |
| Appearance | White spherical powder |
| Morphology / Structure | Spherical · amorphous fused |
| SiO₂ | 99.93 % |
| Al₂O₃ | 491 mg/kg |
| Fe₂O₃ | 56.2 mg/kg |
| K₂O | 33.0 mg/kg |
| Na₂O | 20.4 mg/kg |
| MgO | 14.6 mg/kg |
| TiO₂ | 13.9 mg/kg |
| CaO | 13.8 mg/kg |
| D10 | 8.08 µm |
| D50 (Median) | 9.96 µm |
| D90 | 11.72 µm |
| D99 | 13.21 µm |
| Mean / Mode Size | 9.97 µm / 10.36 µm |
| Std. Deviation | 1.38 µm |
| Test Method | ICP-OES / ICP-MS wet & instrumental analysis · Horiba LA-950 laser diffraction PSD |
| Test Report | KICET test report 2024-4540 |
| Packaging | 1 ton bag |
| Country of Origin | China |
Parent Category: Spherical Silica Powder
Particle size, purity, surface treatment and packaging can be customized to your specification. Contact us for samples, TDS and quotations.