Zircon mullite refractory bricks are high - performance refractory materials. Taking mullite (3Al₂O₃・2SiO₂) as the matrix, zirconia (ZrO₂) is introduced for reinforcement. Through a sintering process, a composite - phase structure is formed, combining high - temperature stability and erosion resistance.
Zircon mullite refractory bricks are high - performance refractory materials. Taking mullite (3Al₂O₃・2SiO₂) as the matrix, zirconia (ZrO₂) is introduced for reinforcement. Through a sintering process, a composite - phase structure is formed, combining high - temperature stability and erosion resistance.
- High - temperature Stability: Can endure high temperatures of 1700-1800℃ for a long time, with a softening temperature under load ≥ 1700°C.
- Excellent Mechanical Strength: The compressive strength at normal temperature is ≥ 80MPa, featuring outstanding compressive and bending resistance.
- Strong Thermal Shock Resistance: With a coefficient of thermal expansion of (4.1 - 5.2)×10⁻⁶℃⁻¹, it can adapt to sudden temperature changes.
- Chemical Inertness: Resistant to the erosion of molten steel and slag, extending the service life of kilns.
- Phase - transformation Toughening Technology: Zirconia (ZrO₂) enhances the toughness of the material, making its performance superior to that of ordinary mullite bricks.
| Index Items | ZM - 6 | ZM - 12 | ZM - 20 | ZM - 30 |
| ZrO₂ /% | ≥ 6 | ≥ 12 | ≥ 20 | ≥ 30 |
| Al₂O₃ /% | ≥ 65 | ≥ 60 | ≥ 58 | ≥ 48 |
| Fe₂O₃ /% | ≤ 0.2 | ≤ 0.2 | ≤ 0.2 | ≤ 0.2 |
| Bulk Density /g/cm³ | ≥ 2.8 | ≥ 2.9 | ≥ 3.1 | ≥ 3.3 |
| Apparent Porosity /% | ≤ 17 | ≤ 17 | ≤ 17 | ≤ 17 |
| Compressive Strength at Normal Temperature /MPa | ≥ 80 | ≥ 80 | ≥ 80 | ≥ 80 |
| Softening Temperature under Load 0.2MPa, T0.6 /℃ | ≥ 1680 | ≥ 1680 | ≥ 1680 | ≥ 1680 |
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