Silicon Nitride Bearing Rollers

Silicon Nitride is an ideal material for bearings. Ceramic bearings have good wear and corrosion resistance, and great mechanical strength under high temperature.


Silicon Nitride Bearing Rollers


Silicon nitride is has excellent thermal shock resistance due to the microstructure. The creep and oxidation resistance of Si3N4 is also superior, its low thermal conductivity and high wear resistance also make it an outstanding material that can withstand conditions of most industrial applications. Silicon Nitride ceramic is ideal for bearing rollers.


Silicon Nitride Bearing Rollers Description


Density3.22 g/cm3
Flexural strength800 MPa
Fracture toughness6.5 MPa m^1/2
Thermal stress parameters569 K


Data Sheet & Typical properties of silicon nitride material:


 TypeGas pressure sintered
 Colordark grey
 Water Absorption%0
 Young ModulusGpa290
 Vickers HardnessGpa18 – 20
 Compressive StrengthMpa2200
 Flexural StrengthMpa650
 Thermal ConductivityW/m.K25
 Thermal Shock ResistanceΔ(°C)450 – 650
 Max. Working Temp.°C1200
 Volume ResistivityΩ ·cm> 10^14
 Dielectric Constant8.20
 Dielectric StrengthkV/mm16
* Tests under room temperature environment;

* The above information is offered for comparison only. Exact properties will vary depending on the manufacturing method.


Typical properties of silicon nitride ceramics

-High strength over a wide temperature range

-High fracture toughness

-High hardness

-Outstanding wear resistance

-Low thermal expansion and high thermal conductivity

-Good thermal shock resistance

-Good resistance to chemical and oxidation


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Packing of Silicon Nitride Bearing Rollers


As a ceramic material, silicon nitride is quite fragile in a lot of cases. Our silicon nitride bearing rollers are carefully handled to minimize damage during storage and transportation. Suitable outer boxes and inner cushioning materials are used for Si3N4products, vacuum packing is also engaged for some of the parts.


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