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SN0910 Silicon Nitride Bearing Ball, Si3N4

  • Catalog No. SN0910
  • Size Diameter: 1~30mm
  • Material Si3N4 Ceramic
  • Purity 97%~99%
  • Density 3.44 g/cm3

Silicon Nitride Bearing Ball Description

Silicon nitride bearing ball is a man-made composite product synthesized through several different chemical reaction methods. Parts are pressed and sintered by well-developed methods to produce a ceramic with a unique set of outstanding properties. Silicon nitride ceramic is ideal for bearing parts. Compared with steel, high-performance silicon nitride bearings balls have better mechanical properties under high temperatures and could survive most corrosive chemicals.

Advanced Ceramic Materials (ACM) can supply full ceramic and hybrid bearings products made of silicon nitride, zirconia as well as silicon carbide.

Silicon Nitride Bearing Ball Specifications


Color Grey
Mechanical Properties
Density 3.21 g/cm3
Compressive Strength 3000 MPa
Flexural Strength 800 MPa
Weibull-Modulus m 15
Fracture Toughness KIc 6.5 MPa m^1/2
Young's Modulus E 320 GPa
Poisson Ratio 0.28
Hardness Vickers (HV 1) 16 GPa
Thermal Properties
Maximum Temperature (Inert Gas) 1200°C
Maximum Temperature (Air) 1100°C
Thermal Conductivity @ 20°C 28 W/mK
Thermal Conductivity @ 1000°C 16 W/mK
Thermal Expansion (20–100°C) 2*10-6/K
Thermal Expansion (20–1000°C) 3.510-6/K
Thermal Shock parameter R1 600 K
Thermal Shock parameter R2 15 W/mm
Electrical Properties
Resistivity at 20°C 10^12 Ωcm
Resistivity at 800°C 10^7 Ωcm
Dielectric constant 6 MHz


Comparison of Si3N4 Ceramic and Steel for Bearing Balls

  Si3N4 Steel
Working temperature 800 ℃ 180 ℃
Density 3.21g/cm3 7.8 g/cm3
Thermal expansion coeff. 3.4×10-6 12.5×10-6
Hardness, HV 1500 About 750
Young’s Module 320GPa 208GPa
Corrosion resistance Good Poor
Thermal conductivity Poor Good
Magnetism No Yes
Wear resistance Excellent Good







Silicon Nitride Bearing Ball Applications

Silicon nitride bearing ball is one of the most thermodynamically stable technical ceramic materials with high hardness as well, silicon nitride ceramic is ideal for bearing parts, especially for those required to work at high speed and high temperature. 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 temperatures and could survive most corrosive chemicals.

Related Documents
Silicon Nitride SDS
SAFETY DATA SHEET of Silicon Nitride
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