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Help CenterHigh Precision 7.938mm 5/16" ZrO2 Zirconium Oxide Zirconia Ball
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Specifications
High precision 7.938mm 5/16" ZrO2 Zirconium oxide zirconia ballDensity>6.05
Wear resistance
High hardness
Specifications
1. High temperature resistant. Use temperatures up to 2400 ℃
2. High density
3. Low thermal conductivity
4. Chemical inertness
5. Resistance to molten metals
6. Lonic electical conduction
7. Wear resistance
8. High fracture toughness
9. High hardness
High precision 7.938mm 5/16" ZrO2 Zirconium oxide zirconia ball
Features of Ceramic Ball:
1. 59% lighter than steel ball, which means less centrifugal force and less wear on the groove during high speed and acceleration.
2. 44% larger elastic modulus, which means less deformation under load.
3. Harder with rockwell hardness as 78.
4. Smaller friction coefficient.
5. Only 1/4 coefficient of thermal expansion of steel, can endure sharp fluctuation of temperature.
6. Superior surface finish can be achieved.
7. Can endure high temperature with high hardness and strength up to 1050 ℃.
8. Nevr rust, and can roll without lubrication.
9. More corrosion resistant than steel.
10. Free of metal contamination.
11. Non-magnetic.
12. Electric isolation.
Table of material performance
| Properties | Unit | AISI 52100 | AISI 440C | ZrO2 | Si3N4 |
|
Density
|
G/cm³ | 7.85 | 7.9 | 6.0 | 3.3 |
|
Thermal expansion coefficient
|
10-6/k |
11 | 17 | 9.6 | 3.2 |
|
Elasticity modulus
|
GPa | 208 | 200 | 210 | 320 |
|
Poisson's ratio
|
0.3 | 0.3 | 0.3 | 0.26 | |
|
Hardness
|
800 | 700 | 1250 | 1500 | |
|
Fracture strength
|
Mpa | 2400 | 2600 | 1000 | 900 |
|
Bending toughness
|
Mpam1/2 | 20 | 25 | 10 | 7 |
|
Working temperature
|
℃ | 120 | 150 | 800 | 1000 |
|
Corrosion resistance
|
none | little | power | power | |
|
Magnetism
|
have | have | none | none | |
|
Size stability
|
no good | no good | good | good | |
|
Conductivity
|
conductor | conductor | insulator | insulator |
Application of Zirconia ball
ZrO2 ball is mainly used for valve ball, full ceramic bearing, metering ball, track ball and precision grinding ball. It can be used in fields requiring chemical resistance, high temperature, electronic insulation, magnetic insulation, non-lubrication. ZrO2 ball is an idea substitute for steel ball in chemical corrosion application. As valve ball, ZrO2 ball is now successfully used in high pressure homogenizer, diaphragm pump, metering pump, oil well pump, high pressure sprayer etc.
Quality control
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