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 PropertyUnitsTypical Value
Composition-Si3N4
Grain Sizeμm1 - 5
Densityg/cc3.23
Hardness (Vickers)HV0.3kg/mm^21400
Compressive StrengthMPa3500
Flexural StrengthMPa950
Weibull Modulus-11
Fracture ToughnessMPa-m^1/28
Poisson's Ratio-0.23
Tensile StrengthMPa400
Modulus of ElasticityGPa290
Thermal ConductivityW/mK28
Coefficient of Thermal Expansion (20-1000°C)1 x 10^-6 /°C3.0
Thermal Shock ResistanceΔT°C900
Electrical ResistivityΩ-cm10^12
Dielectric Constant (1MHz) 8

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