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Ceramic ball
Silicon Nitride BallsSilicon Nitride balls are a popular choice for bearing designers and other high precision productapplications Long life makes this material very suitable for aviation applications.
Silicon Nitride is anti-magnetic and resistant to corrosion by most substances.
Silicon Nitride Ball Properties | |
Compressive Strength | 341,300 psi |
Maximum Useful Temperature | 2552 °F |
Thermal Conductivity | .07 Cal/sec cm °C |
Thermal Expansion | 1.78 x 10to the -6th power/°F |
Electrical Resistivity | >10 to the 6th powerOhm/cm (@500°C), 10to the 5th power Ohm/cm (@ 2000°C) |
Young's Modulus of Elasticity | 47 x 10 to the 6th powerpsi |
Hardness | 1500 - 2000 Vickers |
Density | .116 lbs/inch to the 3rd power |
Zirconia BallsIn certain applications Zirconia balls operate two to three times longer than metal or carbide.
Zirconia balls are inert to corrosive materials with the exception of hydrofluoric acid and hot,
concentrated sulfuric acid. Zirconia has a maximum useful temperature of 1800° F.
Zirconia Ball Properties | |
Compressive Strength | 794,837 psi |
Maximum Useful Temperature | 1800 °F |
Thermal Conductivity | 0.007 Cal/cm, Sec 0 |
Thermal Expansion | 10.9 x 10 to the -6th power /°C |
Electrical Resistivity | 2.2 x 10 to the12th powercm |
Young's Modulus of Elasticity | 30.6 x 10 to the 6th power, 21700 kgr/mm to the 2nd power |
Hardness | 1250 kgr/mm to the 2nd power |
Density | .219 lbs/inch to the 3rd power |
Ceramic bearing ball,G5/G10 ceramic ball