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山东福彩23选5走势图QIYEMINGCHENG：ZHENGZHOUZHENXINGNAIHUOCAILIAOYOUXIANGONGSI
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项目 | 指标 | ||||
DGBJ-90 | DGBJ-85 | DGBJ-80 | DGBJ-75 | ||
化学成分,% | Al2O3≥ | 90 | 85 | 80 | 75 |
MgO | 3~5 | 6~8 | 8~10 | 8~10 | |
体积密度,g/cm³≥ | 110℃×24h | 3.15 | 3.0 | 2.90 | 2.85 |
1000℃×3h | 3.10 | 3.0 | 2.90 | 2.85 | |
1550℃×3h | 3.0 | 2.95 | 2.80 | 2.80 | |
加热永久线变化,% MPa | 110℃×24h | 0~-0.1 | 0~-0.1 | 0~-0.1 | 0~-0.1 |
1000℃×3h | -0.1~+0.1 | -0.1~+0.1 | -0.1~+0.1 | -0.1~+0.1 | |
1550℃×3h | 0~+0.5 | 0~+0.5 | 0~+1.5 | 0~+1.5 | |
抗折强度,MPa≥ | 110℃×24h | 5.0 | 4.0 | 7.0 | 6.0 |
1000℃×3h | 6.0 | 6.0 | 6.0 | 5.5 | |
1550℃×3h | 8.0 | 8.0 | 9.0 | 8.0 | |
耐压强度,MPa≥ | 110℃×24h | 35 | 30 | 45 | 40 |
1000℃×3h | 45 | 40 | 60 | 55 | |
1550℃×3h | 85 | 80 | 60 | 55 | |
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