Description
Polycrystalline mullite fiber board presents itself as an extraordinarily lightweight, high-temperature refractory fiber. It is primarily composed of a sole mullite phase crystal structure. This material finds its purpose as an insulating substance in high-temperature thermal equipment, consistently below 1600 ℃. Notable attributes include a meager bulk density, diminished thermal conductivity, minimal shrinkage, and outstanding chemical stability. The range of polycrystalline mullite fiber offerings encompasses products such as the PMF polycrystalline mullite blanket, polycrystalline mullite veneer block (PMF1600/1700), and PMF polycrystalline mullite fiber module.
Distinctive Characteristics:
- Exceptional resilience against thermal shocks
- Easily subjected to machining, cutting, and shaping
- Striking balance between rigidity and lightness
- Negligible thermal conductivity
- Minimal heat storage capacity
Utilizations:
- High-temperature laboratory applications
- Integration into high-temperature furnaces and kilns
- Contributions to the aerospace industry
- Supporting insulation for dense refractory linings
- Utilized in the construction of expansion joints
Technique Data
| Item | Index | |
| Al2O3 % | 72~75 | |
| Al2O3+SiO2 % | ＞99 | |
| Fe2O3 % | ＜0.1 | |
| Classification temperature | 1600 | |
| Bulk Density Kg/m3 | Loose cotton, 56; Trim block, 100; Stacking block, 180~300 | |
| Permanent Linear Change Rate % 1500℃×6h | ＜1 | |
| Thermal Conductivity W/(m·K) | 1000℃ | 0.226 |
| 1400℃ | 0.387 | |
| Melting Point ℃ | 1840 | |
