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| Material | Mullite |
Mullite insulating bricks are made of calcined mullite and alumina powder and shaped by high-pressure presses or casting processes in different applications.
When fired at elevated temperatures, they contain stable mullite as the main phase structure.
1. High-temperature resistance
2. Good thermal shock resistance
3. Lower thermal conductivity
4. Good corrosion resistance
5. Lower bulk density with lightweight
They are widely used for the inner and back lining of common furnaces, such as annealing furnaces, carburizing furnaces, galvanizing furnaces, roller kilns, cracking furnaces, etc.
| Index | Mullite Insulation Bricks | |||||
| JM26 | JM28 | JM30 | ||||
| Bulk Density g/cm3 | 0.8 | 1 | 0.8 | 1 | 1 | 1.1 |
| Permanent Linear Change | 1400℃×12h %≤ | 1500℃×12h %≤ | 1600℃×12h %≤ | |||
| -0.65 | -0.5 | -1 | -0.7 | -0.9 | -0.7 | |
| Cold Crushing Strength ≥MPa | 2.3 | 3.2 | 2.3 | 3.3 | 3 | 3.5 |
| Thermal Conductivity 350℃w/m.k | 0.25 | 0.32 | 0.28 | 0.34 | 0.4 | 0.43 |
| Al₂O3 % ≥ | 55 | 56 | 64 | 66 | 72 | 72 |
| Fe2O3 % ≤ | 0.9 | 1 | 0.75 | 0.65 | 0.55 | 0.55 |
No.206, Tairan Techonology Park, Shatou Street, Futian District, Shenzhen, Guangdong, China
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