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Bubble Alumina is a rigid, low-density, insulating refractory. Bubble Alumina’s structure consists primarily of closed air-filled thin-walled cells which combine to give it exceptional hot strength and low thermal conductivity. This makes Bubble Alumina an effective high-temperature thermal insulator in structural applications. It is appropriate for use at temperatures as high as 1825℃. It is pre-fired, contains no organics, and exhibits high microwave and RF transparency. Its high alumina content makes it compatible with many extreme chemical environments.
| Color | White |
| Composition (Al2O3), % | 99+ |
| Bulk Density, g/cc | 0.96 |
| Cold Crush Strength, Mpa (psi) | 11 (1600) |
| Shrinkage, % Average of Length & width | |
| 4 hr. at 1750℃ | 0.19 |
| 4 hr. at 1800℃ | 1.77 |
| Specific Heat, Btu/lb ℉(J/kg·K) | 0.27 |
* Structural hot face refractory in high-temperature furnaces and thermal process systems with temperatures of 1825℃.
* Backup insulation in crystal growth furnaces with temperatures in excess of 2000℃.
* Low-mass kiln furniture.
* High-temperature load-bearing insulation.
Our Bubble Alumina Tube is carefully handled during storage and transportation to preserve the quality of our product in its original condition.
