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Silicon Nitride

Composition

Si3N4

Description

Silicon Nitride has a unique grain structure that not only allows it to have exceedingly high toughness but also exceptionally high thermal shock resistance. The ability to create excellent surface finishes makes silicon nitride ideal for applications with high mechanical and thermal rigor.

Example Applications

  • Ball Bearings
  • Turbine Stators & Rotors

CoorsTek Formulations

Contact a CoorsTek expert to choose a Silicon Nitride solution for your application.

  • 17+ application-specific compositions
  • Cerbec® (high-wear ball bearings)
Columns
Property Units Value

Flexural Strength MOR, (20°C)

MPa

640-1000

Compressive Strength, (20°C)

MPa

675-3800

Fracture Toughness, KIc

MPa m1/2

4.25-7.5

Hardness, Rockwell 45N

R45N

-

Hardness, Knoop 1000gm

GPa

15.0-16.0

Maximum Use Temperature

°C

800-1400

Coefficient of Thermal Expansion, (25-1000°C)

1 x 10-6/°C

2.9-3.7

Thermal Shock Resistance, (∆T)

°C

600-1150

Thermal Conductivity, (20°C)

W/m K

19.0-38.0

Dielectric Strength, (6.35mm)

ac-kV/mm

15.0-17.7

Dielectric Constant, (1 MHz)

25°C

7.7-8.3

Volume Resistivity, (25°C)

ohm-cm

1010->1014

The information provided on this chart is for general material property reference only.  The customer should recognize that exact properties of materials may vary according to product configuration but close control of values of most properties can be maintained, if specified. Nothing herein is provided, or is to be construed, as absolute engineering data or constituting a warranty or representation. Contact CoorsTek for cost-effective design, development and manufacturing assistance. CoorsTek has 300+ variations including various forming and firing processes, not all variants are represented in the present website.

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