3.2g/cm3 Silicon Nitride Ceramic Ball Super Wearing Resistance Industrial Ceramic
Super Wearing Resistance Silicon Nitride Ceramic Ball
Description:
Si3N4The density of ceramic is3.20g/cm3,Much lower density than bearing steel 7.85g/cm3,Therefore, the ceramic rolling elements can effectively resist the centrifugal force generated by high-speed rotation and reduce the load of the rolling elements. At the same time, the rotation and sliding between the rolling element and the raceway can be reduced, and it has a beneficial effect on preventing surface damage. Ceramic ball bearings do not need to add lubricating grease frequently, and the characteristics of sensitive rotation, fast starting, good inertia and long life are fully reflected.
Technical Parameters:
| Mechanical behavior | Unit | Al2O3 | SiC | Si3N4 | ZrO2 |
| Colour | ------- | Light yellow | black | black | white,black |
| Density | g/cm3 | 3.95 | 3.15 | 3.2 | 6 |
| Bending strength | MPa | 300～400 | 400～500 | 800～1200 | 950～1200 |
| Elastic modulus E | GPa | 380 | 350 | 300-320 | 210 |
| Poisson's ratio | 0.22 | 0.14 | 0.26 | -------- | |
| Hardness | Hv | 1800 | 2000～2500 | 1400～1700 | 1100～1300 |
| HRC | 80 | 85～90 | 75～80 | 70～75 | |
| Fracture toughness | MPa·m1/2 | 3.0～4.0 | 3.0～4.0 | 5.0～7.0 | 8.0～10.0 |
| Maximum use temperature | ℃ | 1000 | 1300 | 400 | 400 |
| Thermal expansion coefficient | 10-6/℃ | 8.4 | 4 | 3.3 | 10.3 |
| G5 | G10 G16 | G20 G28 G40 | |
| ClassⅠ | Liquid oxygen pump,Active shaft bearing | The key parts of aerospace equipment | |
| ClassⅡ | Vaccum equipment,high speed instrument,mechanical devices,high performance and the most advanced contacting spherical propeller | Motor,medium-low precision star bearing | Testing bearing ball,separating bearing ball |
| ClassⅢ | Sport,entertrainment,food processing | Mechanical devices |
Advantages:
1.Excellent high temperature strength.
2.High breaking strength.
3.excellent thermal shock-resistant.
4.Resist to chemical corrosion.
5.lubricating property.
Application:
1. High precision ceramic bearing.
2. High temperature bearing.
3. Vacuum bearing.
4. Non-magnetic bearing.
5.chemical pump.
6. The heat pump.
7. Ceramic valve ball.
8. Measure the ball.
More pictures:
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