Ceramic Sleeve

Full Ceramic Sleeve bearings can be made in silicon nitride, zirconia or silicon carbide, three kinds in total. You can find those ceramic materials' characteristic at ceramic materials and their properties.




Material Silicon Nitride (Si3N4)
Size 15x25x30mm
Accuracy 0.008mm
Highest Temperature 800℃(1472F)
Circular Runout 15um
Perpendicularity 15um
Circularity 12um
Parallelism 20um
Applications Chemicals, aerospace, medicine, environmental protection equipment, electronics industry, and medicine flow control valves





Performance unit Si3n4
Ingredients Aluninum (Al)              2.0~3.5%
Yttrium (Y)              4.0~5.0%
Titanium (Ti)              1.0~1.5%
Oxygan (O)              4.5~6.0%
Carbon(C)             0.3~0.8%
Other impurities less than 0.1%
The rest is silicon nitride
Density g/cm3 ≥3.20
Hardness Hv 1400~1600
Bending strength Mpa >800
Compressive strength Mpa >4000
Elastic Modulus Gpa 300~315
Fracture toughness Mpa.m1/2 6~8
Cofficient of thermal expansion 10-6/℃ 2.2~3.0
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