Alumina bubble Bricks
Alumina bubble Bricks 1.high temperature resistance 2.low thermal conductivity 3. good thermal insulation
Alumina bubble Bricks
They are widely used in inner linings of various non-contacted melt high temperature kiln and thermal insulating layers of high temperature kilns.
Physical and Chemical Indexes of Hollow Alumina Sphere Bricks | |||||
| Name / Indexes/ Item | MLQ-1.5 | LQ-1.2 | LQ-1.5 | LQ-1.7 | |
Chemical composition | Al2O3 % ≥ | 84 | 98.5 | 98.5 | 98.5 |
| Fe2O3 % ≤ | 0.8 | 0.3 | 0.3 | 0.3 | |
| SiO2 % ≤ | 15 | 1.0 | 1.0 | 1.0 | |
Bulk density g/m3≤ | 1.5 | 1.2 | 1.5 | 1.7 | |
Compressive strength at normal temperature MPa≥ | 16 | 3 | 12 | 15 | |
| Porosity % ≥ | 58 | 62 | 60 | 58 | |
| Soften point at 0.1MPa KD°C≥ | 1650 | 1650 | 1700 | 1700 | |
| Fire resistant (°C)≥ | 1800 | 1800 | 1800 | 1800 | |
| Thermal conductivity Hot side 1000°CW/m.k≤ | 1.2 | 0.95 | 1.05 | 1.15 | |
Alumina bubble Bricks
