Silicon Nitride

Silicon nitride’s unique properties of high strength, superior fracture toughness and excellent hardness provides a unique engineering material solution for your project’s extreme environments and demanding mechanical / structural requirements.

Superior Thermal Shock Resistance

The cross-linked microstructure of our silicon nitride material allows for very high thermal shock resistance as compared to other advanced ceramic materials.

Excellent fracture toughness & high mechanical strength

Our Si3N4 material is an excellent choice for your high temperature structural applications.


Silicon Nitride Properties

Physical Property Units Typical Value
Composition - Si3N4
Grain Size μm 1 - 5
Density g/cc 3.23
Hardness (Vickers) HV0.3kg/mm^2 1400
Compressive Strength MPa 3500
Flexural Strength MPa 950
Weibull Modulus - 11
Fracture Toughness MPa-m^1/2 8
Poisson's Ratio - 0.23
Tensile Strength MPa 400
Modulus of Elasticity GPa 290
Thermal Conductivity W/mK 28
Coefficient of Thermal Expansion (20-1000°C) 1 x 10^-6 /°C 3.0
Thermal Shock Resistance ΔT°C 900
Electrical Resistivity Ω-cm 10^12
Dielectric Constant (1MHz)   8

All properties are at room temperature (20°C) unless otherwise stated.