SiO₂ ≥99.995% · spheroidization ≥99% · U/Th <0.1 ppb — chemically synthesized spherical silica, custom D50 20 nm–2 µm
Synthetic Spherical Silica consists of silicon dioxide (SiO₂) particles produced by chemical synthesis, with a perfectly spherical shape and tightly matched particle size. SiO₂ purity is held at ≥99.995%, spheroidization and sphericity are each ≥99.0%, and uranium (U) and thorium (Th) are each below 0.1 ppb, making it an ultra-low-radioactivity material. Electrical conductivity below 1.0 µS/cm reflects extremely low ionic impurities, ideal for reliability-critical electronic materials such as semiconductor packaging. Particle size (D50) is produced to customer requirements anywhere from 20 nm to 2 µm, and the surface can be modified with amino or mercapto groups or given a hydrophobic treatment with a contact angle above 150°. On request it is also supplied as electronic-grade 6N silica sol in water-based or custom solvent-based form, for CMP polishing, coatings and resin hybrids.
Key Features
- 🔵 Perfect Spheres · Spheroidization ≥99.0% — Sphericity and spheroidization both ≥99.0% — uniform spheres that disperse evenly without agglomeration
- 🧪 Ultra-High Purity SiO₂ ≥99.995% — Synthesized from purified precursors — metallic impurities blocked at the raw-material stage
- ☢️ Ultra-Low Radioactivity U/Th <0.1 ppb — Virtually free of ore-derived radioactive elements — helps suppress soft errors in HBM and AI chips
- 📐 Custom D50 from 20 nm to 2 µm — Particle size designed to your target D50, from nano to submicron
- ⚡ Conductivity <1.0 µS/cm — Extremely low ionic impurities reduce corrosion and ion-migration risk for reliable insulation
- ⚗️ Surface Modification · Hydrophobic Treatment — Amino- or mercapto-functionalization available; hydrophobic treatment reaches contact angles above 150°
Technical Specifications
| Item | Value | Note |
|---|---|---|
| Process | Chemical synthesis | |
| Morphology | Spherical | |
| SiO₂ Purity | ≥ 99.995 % | Ultra-high purity |
| Spheroidization | ≥ 99.0 % | |
| Sphericity | ≥ 99.0 % | |
| Particle Size (D50) | 20 nm – 2 µm | Customizable |
| Electrical Conductivity | < 1.0 µS/cm | |
| Radioactive Elements | U < 0.1 ppb · Th < 0.1 ppb | Ultra-low-α |
| Surface Modification | Amino / mercapto groups · hydrophobic (contact angle ≥150°) | |
| Silica Sol Option | Electronic-grade 6N · water-based / custom solvent | |
| Country of Origin | China |
Main Applications
Advanced Packaging
Parent Category: Chemically Synthesized Silica
Particle size, purity, surface treatment and packaging can be customized to your specification. Contact us for samples, TDS and quotations.