Alumina Bubble Fire Bricks are composed of Alumina bubble as the primary material, high performance ultrafine powder as an additive and organic matter as a binder; after molding and drying they are fired in a 1750 high temperature shuttle kiln.
Alumina Bubble products feature impressive properties such as lightweight construction, high temperature resistance, minor changes to firing line orientation and good thermal shock resistance – not to mention lower construction costs and greater energy conservation.
| Properties | GKQ-90 | GKQ-99 |
| Al₂O₃ (%) | 88-92 | ≥98.5 |
| Fe₂O3(%) | ≤0.05 | ≤0.03 |
| Bulk Density (g/cm3) | 1.4-1.7 | 1.6-1.8 |
| Normal temperature compressive strength ( M p a ) | 212 | 212 |
| Refractoriness under load( ℃ ) | 21700 | 21700 |
| On Reheating Linear change ( % ) | ±0.2 | ±0.2 |
| Max service temperature( ℃ ) | 1750 | 1750 |
