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| Al2O3 | ≥48 | ≥48 | ≥48 | ≥48 | ≥48 | ≥48 |
| Fe2O3,% | ≤2.0 | ≤2.0 | ≤2.0 | ≤2.0 | ≤2.0 | ≤2.0 |
| 体积密度，g/cm3 | ≤1.0 | ≤0.8 | ≤0.7 | ≤0.6 | ≤0.5 | ≤0.4 |
| 常温耐压强度，MPa | ≥3.9 | ≥2.9 | ≥2.5 | ≥2.0 | ≥1.5 | ≥1.0 |
| 重烧线变化≤2%，试验温度°C | 1400 | 1400 | 1350 | 1350 | 1250 | 1250 |
| 热导率/W.(m.K)-1(平均温度350度±25度） | 0.50 | 0.35 | o.35 | 0.30 | 0.25 | 0.20 |
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