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Silica fume vs Fused silica: Điểm khác biệt chính người mua cần biết
Compare silica fume and fused silica by production process, purity, particle size, applications and cost.
## Overview
Silica fume and fused silica are both high-SiO₂ materials but differ significantly in production, particle size, purity and cost.
## Property comparison
| Property | Silica Fume | Fused Silica |
|----------|-------------|--------------|
| SiO₂ content | 85%–98% | ≥ 99% |
| Average particle size | 0.1–0.5 μm | 0.1–100 μm |
| Particle shape | Spherical | Angular |
| Bulk density | 200–700 kg/m³ | 600–1,500 kg/m³ |
| Cost per ton | Lower | Higher |
## How to choose
1. Need a pozzolanic additive for concrete? → Silica fume
2. Need high-purity filler or crucible raw material? → Fused silica
3. Budget-sensitive with moderate purity needs? → Silica fume
4. Very low iron content required (< 0.01%)? → Fused silica
## What buyers should clarify
Before inquiry, specify the target application, minimum SiO₂ required, acceptable particle size range and monthly volume.