| Item | Unit | Index | |
| Al2O3 ≥ | % | 50 | |
| SiO2 ≥ | % | 39-45 | |
| Bulk Density ≤ | g/cm³ | 2.4 | |
| Max Service Temperature ≥ | ℃ | 1500 | |
| Linear Change on Reheating | 900℃×3h | % |
1000(℃) -0.1 |
| 1200℃×3h | - | ||
| 1500℃×3h | ±0.3 | ||
| Modulus of Rupture | 110℃ drying | Mpa | 10 |
| 1200℃×3h | 9 | ||
| Crushing Strength | 110℃ drying | Mpa | 90 |
| 1200℃×3h | 70 | ||
| Thermal Conductivity ≤ | W/m·k | 1.25(800±25℃) | |