Open Access
Table 1.
Compositions and properties of Alumina (Al2O3) ceramic used for experimentation.
| Material type | Recrystalised Alumina |
|---|---|
| Percentages of compositions | |
| Alumina (Al2O3) | 99 |
| Silica (SiO2) | 0.7 |
| Magnesia (MgO) | 0.07 |
| Iron oxide (Fe2O3) | 0.07 |
| Sodium oxide, Calcia | Rest |
| Volume density gm/cc | 3.85 |
| Apparent porosity % | Nil – 0.1 |
| Expansion coefficient 20–1000 °C | 8.4 × 10−6/°C |
| Melting point | 2000 °C |
| Limit of use | 1900 °C |
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