Chrome corundum refractory bricks are refractory materials made from high - purity α - Al₂O₃ and Cr₂O₃ as the main raw materials. They are formed by high - pressure molding or slurry casting and then sintered at high temperatures.
Chrome corundum refractory bricks are refractory materials made from high-purity α-Al₂O₃ and Cr₂O₃ as the main raw materials. They are formed by high - pressure molding or slurry casting and then sintered at high temperatures. They combine the high-temperature stability of corundum and the erosion - resistance of chromium oxides, and are widely used in extreme high - temperature environments.
Features and Properties
| Index Items | Chrome - corundum - 10 | Chrome - corundum - 12 | Chrome - corundum - 15 | Chrome - corundum - 30 |
| Al₂O₃ /% | ≥ 83 | ≥ 80 | ≥ 78 | ≥ 62 |
| Cr₂O₃ /% | ≥ 10 | ≥ 12 | ≥ 14.5 | ≥ 30 |
| ZrO₂ /% | 2 - 3 | / | / | / |
| Fe₂O₃ /% | ≤ 0.3 | ≤ 0.3 | ≤ 0.3 | ≤ 0.3 |
| Bulk Density /g/cm³ | ≥ 3.25 | ≥ 3.25 | ≥ 3.25 | ≥ 3.4 |
| Apparent Porosity /% | ≤ 17 | ≤ 18 | ≤ 18 | ≤ 17 |
| Compressive Strength at Normal Temperature /MPa | ≥ 100 | ≥ 100 | ≥ 100 | ≥ 100 |
| Softening Temperature under Load (0.2MPa, T0.6) /℃ | ≥ 1700 | ≥ 1700 | ≥ 1700 | ≥ 1700 |
| Thermal Shock Stability (950℃, air - cooled) / times | ≥ 12 | ≥ 12 | ≥ 12 | / |
Al₂O₃:≥62%;
Cr₂O₃:≥10%;
Cold Crushing Strength:≥100MPa;
Al₂O₃:≥80%;
Bulk Density:≥2.75g/cm³;
Cold Crushing Strength:≥85MPa;
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