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高纯氧化铝刚玉球
| 项目 | 90瓷 | 92瓷 | 95瓷 | 99瓷 |
| Al2O3，% | ≥90 | ≥92 | ≥95 | ≥99 |
| Fe2O3，% | ≤0.28 | ≤0.25 | ≤0.15 | ≤0.10 |
| SiO2，% | ≤6 | ≤4 | ≤2 | ≤0.3 |
| 耐火度 ，% | ≥1750 | ≥1780 | ≥7800 | ≥1850 |
| 抗压强度,MPa | ≥90 | ≥120 | ≥150 | ≥180 |
| 吸水率,% | ≤5 | ≤5 | ≤5 | ≤5 |
| 耐酸度,% | ≥98.5 | ≥98.5 | ≥98.6 | ≥98.8 |
| 耐碱度,% | ≥90 | ≥92 | ≥93 | ≥95.5 |
| 抗热震性能,℃ | 800 | 820 | 850 | 900 |
| 体积密度,g/cm3 | ≥3.2 | ≥3.5 | ≥3.6 | ≥3.8 |
| 堆积密度,g/cm3 | ≥1.7 | ≥1.8 | ≥1.9 | ≥2.0 |
