Alumina
Tabular Alumina
Tabular alumina is a fully sintered, densified alpha alumina produced above 1800 °C without additives. Its coarse hexagonal crystals, very low porosity, outstanding refractoriness and excellent thermal-shock resistance make it the first-choice aggregate for high-performance shaped and monolithic refractories.
Typical Analysis
| Chemical Composition | Value (%) |
|---|---|
| Al₂O₃ (typical) | 99.1 - 99.5 |
| Na₂O | 0.4 - 0.6 |
| SiO₂ | 0.09 - 0.15 |
| Fe₂O₃ | < 0.1 |
Key Properties
| Main phase | Alpha alumina (corundum) |
|---|---|
| Sintering temperature | > 1800 °C |
| Grain size | from 0-0.045 mm to 6-3 mm |
