| Item 项目 | High Purity Corundum Brick 高纯刚玉砖 | Corundum Brick 刚玉砖 | Corundum Mullite Brick 刚玉莫来石砖 | |
| Al2O3(%) | ≥ | 99 | 90 | 80 |
| SiO2(%) | ≤ | 0.2 | 8 | 18 |
| Fe2O3(%) | ≤ | 0.2 | 0.2 | 0.3 |
| Apparent Porosity 显气孔率(%) | ≤ | 19 | 18 | 18 |
| Bulk Density 体积密度(g/cm3) | ≥ | 3.2 | 3.0 | 2.8 |
| Refractoriness 耐火度(℃) | ≥ | 1790 | 1790 | 1790 |
| Cold Crushing Strength 常温耐压强度(Mpa) | ≥ | 100 | 100 | 100.0 |
| Refractoriness under Load 荷重软化开始温度(℃) (0.2Mpa) | ≥ | 1700 | 1700 | 1700 |