98% Spheroidization · SiO₂ >99.9% · D50 0.3±0.1 µm — Submicron High-Sphericity Silica (SN-SPJ-300)
SN-SPJ-300 Submicron Spherical Silica is a submicron high-sphericity SiO₂ powder meeting a spheroidization rate specification of >95% with a typical value of 98%. SiO₂ purity is specified at >99.9% (typical 99.92%), with a narrow particle size distribution of D50 0.3±0.1 µm (typical 0.385 µm), D10 0.219 µm and D90 0.678 µm.
The specific surface area is controlled to 10–15 m²/g (typical 11.1 m²/g), so even at this fineness the powder disperses stably in resins and slurries and enables high filler loading without excessive viscosity build-up. Moisture <0.2% (typical 0.11%), water-extract conductivity EC <20 µS/cm (typical 14.36 µS/cm) and pH 6.5±1 (typical 5.9) keep ionic impurities low, suppressing migration and corrosion risks in electronic materials.
The low-friction, low-stress behavior derived from its high spheroidization rate benefits applications requiring ultra-fine fillers — semiconductor EMC and underfill, low-Dk CCL and prepreg, conductive and thermally conductive pastes, optical and precision coatings, and ceramic coatings for secondary batteries. The particle size distribution can be adjusted to the customer's actual operating conditions.
Key Features
- ⚪ 98% Spheroidization Rate — Spec >95%, typical 98% — high sphericity for low-friction, low-stress formulation
- 🧪 High Purity SiO₂ >99.9% — Typical 99.92% — high-purity filler grade for electronics and optics
- 📐 Submicron D50 0.3 µm — D10 0.219 · D50 0.385 · D90 0.678 µm — narrow, uniform distribution
- 🌀 Stable SSA 10–15 m²/g — Typical 11.1 m²/g — suppresses viscosity build-up despite fineness
- 💧 Low Ionics & Low Moisture — EC <20 µS/cm (typ. 14.36) · moisture <0.2% (typ. 0.11%)
- 🛠️ Customizable PSD — PSD can be adjusted to the customer's actual usage conditions
Technical Specifications
| Item | Value |
|---|---|
| Product Code | SN-SPJ-300 |
| Appearance | White spherical fine powder |
| Morphology | Spherical |
| Spheroidization Rate (Spec / Typical) | >95 % / 98 % |
| SiO₂ (Spec / Typical) | >99.9 % / 99.92 % |
| Moisture (Spec / Typical) | <0.2 % / 0.11 % |
| SSA (Spec / Typical) | 10 ~ 15 m²/g / 11.1 m²/g |
| Water Extract EC (Spec / Typical) | <20 µS/cm / 14.36 µS/cm |
| Water Extract PH (Spec / Typical) | 6.5 ± 1 / 5.9 |
| D10 (Typical) | 0.219 µm |
| D50 (Spec / Typical) | 0.3 ± 0.1 µm / 0.385 µm |
| D90 (Typical) | 0.678 µm |
| Country of Origin | China |
| Packaging | 5 / 10 kg bag · OEM available |
| Note | PSD can be adjusted according to the customer's actual situation |
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.