Introduction cordierite ceramic insulator
Cordierite insulator or cordierite ceramic insulator belongs to cordierite ceramic. The main chemical ingredient of cordierite is 2MgO, 2Al2O3, 5SiO2. Main material is steatite, clay, alumina, feldspar etc. It is manufactured by normal ceramic technic. It can be used for loop framework, insulators of arc-resistance, element of composite materials, burnable nozzle of electrical insulators and so on.
Characteristics and Technical Data sheet of cordierite ceramic insulator
Item | Test condition | Unit | Cordierite ceramics |
Chemical ingredients | 2MgO 2Al2O3 5SiO2 | ||
Bulk Density | g/cm3 | 2.1 | |
Max. Use Temp. | 1000℃ | ||
Water absorption | % | 0 | |
Hardness | HV | 800 | |
Bending strength | 20℃ | Kgf/cm2 | 900 |
Compressive Strength | 20℃ | Kgf/cm2 | 3500 |
Fracture Toughness | K(l c) | Mpa m^1/2 | – |
Coefficient of thermal expansion | 1X10^-6/℃ | <=2.0-3.0 | |
Coefficient of 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 | >10^12 |