Introduction
Due to the excellent mechanical strength and toughness, zirconia ceramic is reputed as the "ceramic steel" among the industry. With the good performance in the electrical insulation, thermal stability, corrosion resistance and wear resistance, zirconia ceramic parts can do a lot of jobs which the metal and plastic cannot, such as the ceramic valve, ceramic piston, ceramic shaft, ceramic knife/blade, ceramic seal ring, ceramic tweezers and ceramic nozzles etc. Zirconia precise balls are usually used as the ceramic valves, bearing balls, etc.
Technical parameters
|
Colour |
white |
|
Density |
6.02 g/cm3 |
|
Water Absorption |
0 |
|
Hardness(HV) |
1350 |
|
Flexural Strength |
1100 MPa |
|
Compressive Strength |
3600 MPa |
|
Young's Modulus Of Elasticity |
320 GPa |
|
Poisson's Ratio |
0.25 |
|
Thermal Conductivity |
3W/m°C |
|
Dielectric Strength |
14KV/mm |
|
Volume Resistivity(25ºC) |
>1014Ω·cm |
Advantages
- High temperature resistant
The thermal expansion coefficient of ceramic ball is small, and the bearing ball will not expand because of temperature in high temperature environment, which greatly improves the service temperature of the whole bearing.
- Longer Use Life:
No need to add any grease to ceramic ball, it means, even if the grease is dry, the bearing can still operate, so as to avoid the occurrence of premature damage of bearings caused by grease drying in ordinary bearings.
- Insulation:
Bearings with ceramic balls can be insulated between the inner and outer rings of bearings. Because the ceramic ball is an insulator, the effect of insulation can be achieved by using the ceramic ball between the inner and outer rings of the bearing. This enables the bearing to be used in a conductive environment.
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