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SC0909 Silicon Nitride Bearings

Catalog No. SC0909
Material Ceramic
Purity 97%~99%
Density 3.44 g/cm3

 

Silicon Nitride Bearing Description

Silicon Nitride BearingsSilicon Nitride is a high-melting-point ceramic material that is extremely hard and relatively chemically inert. The material is prepared by heating powdered silicon between 1300 °C and 1400 °C in an atmosphere of nitrogen. Then the powder of silicon nitride can be sintered to designed shape. Silicon Nitride is an ideal material for bearings. Ceramic bearings have good wear and corrosion resistance, and great mechanical strength under high temperature. We can supply full ceramic and hybrid bearings products made by Silicon Nitride, Zirconia as well as SiC.

Silicon Nitride Bearing Specifications 

Comparison of ceramic and Steel for bearings

 

Si3N4

ZrO2

Steel

Working temperature

800 C

800 C

180 C

Density

3.24 g/cm3

6 g/cm3

7.8 g/cm3

Thermal expansion coeff.

3.4×10-6

10.5

12.5×10-6

Hardness, HV

1500

1300

About 750

Young’s Module

320 GPa

210 GPa

208 GPa

Corrosion resistance

Good

Good

Poor

Thermal conductivity

Low

Low

High

Magnetism

None

None

Yes

Wear resistance

Excellent

Excellent

Good

 

 

 

 

 

 

 

 

 

 

 

Silicon Nitride Bearing Applications

Silicon Nitride ceramic is ideal for bearing parts. Si3N4 bearing balls have already been applied in automobiles, rockets high-speed engines, equipment working in a corrosive environment and some performance model cars. Compared with steel, high-performance ceramic balls have better mechanical properties under high temperature and could survive from most the corrosive chemicals. As the price of ceramic materials decreased, it could have more applications. 

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Silicon Nitride Bearings
Average rating:  
 1 reviews
by Terry Tolbert on Silicon Nitride Bearings

Quality product, work well. Five stars