| Item | AKZ-85 | AKZ-90 | AKZ-99 | |
| Chemical composition% | AL2O3≥ | 85 | 90 | 99 |
| SiO2≤ | 13 | 8 | 0.2 | |
| Fe2O3≤ | 0.5 | 0.5 | 0.5 | |
| Apparent porosity% | 58-62 | 58-62 | 58-62 | |
| Bulk density g/cm3 | 1.4-1.7 | 1.4-1.7 | 1.4-1.7 | |
| Cold crushing strength Mpa , ≥ | 12 | 10 | 9 | |
| 0.1Mpa Refractorinessunder load T0.6℃, ≥ | 1650 | 1700 | 1700 | |
| Permanent linear change on reheating (1500℃×2h)% | ±0.3 | ±0.3 | ±0.3 | |
| 20∽1300℃ Thermal expansion %(×10-6) | 0-7.8 | 0-8.0 | 0-8.6 | |
| Themal conductivity (everage 800℃)W/(M.K) ,≤ | 0.8 | 1.3 | 1.5 | |
