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Silicon Nitride Extrusion Si3N4 Roller round rods industrial ceramics

  • Offers excellent wear resistance and accuracy in extreme temperature conditions
  • An alternative to wheels made with conventional metal alloys
  • 60% lighter than steel
  • Delivers high strength and fracture toughness
  • Excellent thermal shock resistance
  • Resistant to wear and erosion
  • Exhibits nonmagnetic properties and electrical insulation
  • Corrosion and chemical resistant
  • Offers design flexibility for a customized solution
  • 0321

Material properties: 

Silicon nitride ceramics are inorganic materials that do not shrink when sintered. Silicon nitride is very strong, especially hot pressed silicon nitride, and is one of the hardest substances in the world. It is inherently lubricious and is highly resistant to wear and corrosion, and to oxidation at high temperatures. It is also resistant to hot and cold shocks, and will not shatter when heated to over 1000 °C in air, cooled sharply and then heated sharply again.

Application industry:

Machinery, electronic, semiconductor, chemical, petroleum, smelt.

Specific application:

Welding shaft, electronic substrate, plunger, nozzle, slide guide, diesel parts, metal molding, shaft wheels etc.

Properties Of Silicon Nitride

Property Item Data Unit



Color Black/Grey -
Density 3.2 g/cm3
Bending Strength 750 MPa
Compressive Strength 3800 MPa
Elastic Modulus 290 GPa
Fracture Toughness 7 MPa m1/2
Weber Coefficient 15 m
Vickers Hardness 1700 HV 0.5



Coefficient of Line

Thermal Expansion

2 10-6 K-1

Thermal Conductivity

20 W/mK

Thermal Shock Resistance (Put in Water)

750 ΔT℃

Max Working Temperature




Volume Resistance at 20℃

>1014 Ωcm

Dielectric Strength

10×106 V/m

Dielectric Constant

- εr

One MHZ Dielectric

Loss Angle at 20℃

- tanδ



Nitric Acid(60%)90℃

1 WT Loss mg/cm2/day

Sulphuric Acid(95%)95℃

Caustic Soda(30%)80℃ 0.2

Main products:
Our company specializes in the production of zirconia ceramic precision parts, alumina ceramic precision parts, silicon nitride ceramic precision parts, silicon carbide ceramic precision parts, machinable ceramic precision parts, microporous ceramic precision parts, aluminium nitride ceramic precision parts, cemented carbide (tungsten steel) precision parts and so on.
The products are widely used in precision machinery manufacturing, microelectronics, semiconductor, aerospace, biomedicine, optical fibre communication, testing and inspection, solar photovoltaic and other fields.

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Founded in June 2006, Shenzhen Haorui IndustriaI Technology Co.,Ltd. is a professional enterprise engaged in R&D, manufacturing and sales of non-standard industrial ceramics, hard alloys (tungsten steel) and various metal and non-metal precision machinery parts.

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