项目 |
**高纯刚玉砖 |
烧结白刚玉砖 |
莫来石刚玉砖 |
AL2O3% |
≥97 |
≥90 |
≥80 |
SiO2% |
≤0.2 |
≤8 |
≤18 |
Fe2O3% |
≤0.2 |
≤0.2 |
≤0.3 |
体积密度g/cm3 |
≥3.2 |
≥3 |
≥2.8 |
显气孔率% |
≤19 |
≤18 |
≤18 |
常温耐压强度MPa |
≥100 |
≥100 |
≥100 |
荷重软化开始温度℃ |
≥1700 |
≥1700 |
≥1700 |