Zirconium
Zirconium Silicate (Zircon)
Zircon offers high refractoriness, very low thermal expansion, excellent resistance to molten metal and slag, and high opacity. It is widely used in glass-furnace refractories, foundry moulding and as an opacifier in ceramic glazes and porcelain bodies.
Typical Analysis
| Property | Value |
|---|---|
| Composition | 99% ZrSiO₄ |
| ZrO₂ + HfO₂ (%) | 66.5 |
| SiO₂ (%) | 32.5 |
| Al₂O₃ (%) | 0.5 |
| Fe₂O₃ (%) | 0.06 |
| TiO₂ (%) | 0.12 |
| Specific gravity (g/cm³) | 4.6 |
| Bulk density (g/cm³) | 1.6 |
| Particles above 105 µm | max 1% |
| Particles 75–105 µm | min 50% |
| Particles below 75 µm | max 49% |
Key Properties
| Purity | 99% ZrSiO₄ |
|---|---|
| Iron | 0.06% — suited to white glazes |
| Minimum order | 25 t (one container) |
