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High strength Silicon nitride ceramic block Silicon Nitride (Si3N4) Square structural parts

Typical properties
-High strength over a wide temperature range
-High fracture toughness
-High hardness
-Outstanding wear resistance
-Low thermal expansion and high thermal conductivit
-Good thermal shock resistance
-Good resistance to chemical and oxidation
  • 0309

Silicon nitride ceramic square structural parts 

Silicon Nitride (Si3N4) has the most versatile combination of mechanical, thermal, and electrical properties of any advanced ceramic material. It is a high performance advanced ceramic that is extremely hard and has exceptional thermal shock and impact resistance. It surpasses the high temperature capabilities of most metals and has a superior combination of creep and oxidation resistance. Additionally, its low thermal conductivity and high wear resistance make it an excellent material that can withstand the toughest of conditions in the most demanding industrial applications. Silicon Nitride is an excellent choice when high-temperature and high-load abilities are needed.

Silicon nitride ceramic square structural parts are very wear-resistant because of their superb hardness and self-wetting properties. In addition, silicon nitride ceramic does not react with other inorganic acids except hydrofluoric acid, and is highly resistant to corrosion. Moreover, it has excellent resistance to thermal shock and will not rupture when heated to 1000°C in air and then rapidly cooled.

Silicon Nitride Applications

  • Rotating ball bearings and rollers bearings

  • Cutting tools

  • Engine components: valves, rocker arm pads, seal faces

  • Induction heating coil supports

  • Turbine blades, vanes, buckets

  • Welding and brazing jigs

  • Heating element components

  • Crucibles

  • Metal tube forming rolls and dies

  • TIG / Plasma welding nozzles

  • Weld positioners

  • Precision shafts and axles in high-wear environments

  • Thermocouple sheaths and tubes

  • Semiconductor process equipment

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 1300



Volume Resistance at 20℃ >10 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℃ ≒0.00
Caustic Soda(30%)80℃ 0.2

This data is the result of laboratory testing. Customers need to judge whether it can be used according to the specific environment.

For more customization details, Please contact us.

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