Cordierite is a natural mineral, but its reserves in nature are very small. At present, cordierite is mainly obtained through artificial synthesis. The traditional method of preparing cordierite ceramics is solid phase sintering. With the deepening of research, the preparation methods of cordierite ceramics have gradually developed from the traditional solid phase sintering method to sol gel method, molten glass method, low-temperature combustion method and other preparation methods.
Item
| Test Condition | Unit&Symbol | Cordierite Ceramics |
The main chemical ingredient
| MgO, Al2O3,SiO2 | ||
Bulk Density
| gm/cc | 2.6 | |
Maximum Use Temperature
| 1400℃ | ||
Hardness
| HV | 800 | |
Bending Strength
| 20℃ | Kgf/cm2 | 900 |
Compressive Strength
| 20℃ | Kgf/cm2 | 3500 |
Fracture Toughness
| K(I c) | Mpa m1/2 | - |
Thermal expansion
| 1X 10-6/℃ | ≤2.0 | |
Thermal conductivity
| 25℃-30℃ | W/m.k | 1.3 |
Thermal Shock Resistance
| Tc | ℃ | 250 |
Dielectricity constant
| 1MHz.25℃ | 6 | |
Dielectric strength
| ac-kV/mm (ac V/mil) | 10 | |
Volume Resistivity
| 20℃ | ohm-cm | > 1012 |