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Alumina Bubble Brick contains more than 90% Al2O3 and is a lightweight refractory product mainly composed of corundum. Al2O3 and the appropriate amount of clay and bonding agent are used as raw materials, and gas-blowing agents are used in the preparation stage. The product has good high-temperature structural properties and can be used in industrial kilns at 1600~1800°C.
| Properties | SPEC | TYPICAL | |
| Classification temperature (°C) | 1800°C/3270°F | ||
| Bulk Density (g/cm3) | 1.65 Max | 1.55 | |
| Cold Crushing Strength (kg/cm2) | 100 Min | 150 | |
| Thermal Conductivity (W/mK) at 350°C | - | 0.9 | |
| Reheat shrinkage (1,700°C*8 hours, %) | - | 0.06 | |
| Chemical Composition (%) | Al2O3 | 98.0 Min | 99.2 |
| SiO2 | - | 0.3 | |
| Fe2O3 | 0.5 Max | 0.2 | |
Used as the main refractory lining for hot surfaces or as an insulation material behind other refractories in furnaces, flues, kilns, and similar high-temperature industrial equipment.
Our Bubble Alumina Bricks are carefully handled during storage and transportation to preserve the quality of our product in its original condition.
