项目/牌号 | LD-1 | LD-2 | LD-3 | |
Al2O3,% | ≥ | 70 | 75 | 85 |
SiO2,% | ≤ | 25 | 17 | 13 |
Fe2O3,% | ≤ | 1 | 1 | 1 |
体积密度,g/cm³ | ≥ | 2.7 | 2.8 | 2.9 |
耐压强度,MPa | ≥ | 75 | 85 | 95 |
≥ | 100 | 110 | 120 | |
≥ | 115 | 120 | 125 | |
抗折强度,MPa | ≥ | 10 | 11 | 12 |
≥ | 16 | 17 | 18 | |
≥ | 17 | 18 | 19 | |
0.2MPa荷重软化温度,℃ | ≥ | 1450 | 1480 | 1500 |
热震性(900℃,水冷),次 | ≥ | 15 | 13 | 10 |
最高使用温度,℃ | 1550 | 1550 | 1550 | |
重烧线变化,% | ≤ | -0.3 | -0.2 | -0.2 |