Fused Silica A Grade
Fused Silica A Grade is a high-purity amorphous silicon dioxide (SiO₂) material produced from selected natural quartz through high-temperature melting and rapid cooling.
With extremely low impurity levels, zero free quartz, and free cristobalite, it is widely used in refractory, foundry, and high-temperature industrial applications.
Our A Grade fused silica is supplied in grains and powders with consistent quality and stable performance.
Product Images
Fused silica A grade 4-10 Mesh
Fused silica A grade 20-50 Mesh
Fused silica A grade 50-100 Mesh
Chemical Composition – Fused Silica A Grade
| Component | Grains (%) | Powders (%) |
|---|---|---|
| SiO₂ | 99.9 | 99.8 |
| Al₂O₃ | < 0.02 | < 0.03 |
| Fe₂O₃ | < 0.01 | < 0.02 |
| TiO₂ | < 0.01 | < 0.01 |
| CaO | < 0.01 | < 0.01 |
| MgO | < 0.02 | < 0.01 |
| K₂O | < 0.01 | < 0.01 |
| Na₂O | < 0.01 | < 0.01 |
| C | < 0.01 | < 0.01 |
| Quartz (SiO₂) | 0 | 0 |
| Cristobalite (SiO₂) | FREE | FREE |
| Amorphous Matter | Fused | Fused |
Physical Properties
| Property | Value |
|---|---|
| Specific Gravity | 2.2 |
| pH Value | 6.5 |
Available Particle Sizes
• 4–10 Mesh (Coarse Grains)
• 10–20 Mesh
• 20–50 Mesh (Medium Grains)
• 50–100 Mesh (Fine Grains)
• Custom particle sizes available upon request
All particle sizes are produced with controlled screening and stable quality to meet refractory and foundry industry requirements.
Applications
• Induction furnace linings
• Refractory castables and ramming mass
• Foundry coatings
• High-temperature insulation materials
• Investment casting shells
Fused Silica A Grade is especially suitable for applications requiring low thermal expansion, high thermal stability, and high chemical purity.
Packaging & Supply
• 25 kg kraft paper bags, 50 bags per pallet, stretch wrapped
• 1200 kg or 1250 kg jumbo bags on pallet
• Customized packaging available
Why Choose Our Fused Silica A Grade
• High purity up to 99.9% SiO₂ with extremely low impurity levels
• Zero free quartz and free cristobalite for safe refractory applications
• Stable chemical composition and consistent particle size distribution
• Strict quality control from raw material selection to final inspection
• Direct manufacturer supply with export experience
Our Fused Silica A Grade is supplied with a focus on long-term stability, reliability, and technical consistency for industrial customers worldwide.