Silicon Nitride

Electrically insulating, relatively good corrosion resistance, medium operating temperature (1300 C), structural ceramics, good mechanical characteristics, low thermal expansion, high thermal conductivity, very good thermal shock resistance, low specific weight.
Technical Parameters
Description Unit Value
Material   Si3N4
Colour   grey, black
Density g/cm3 3.2
Flexural Strength MPa 750
Compressive Strength MPa 2,500
Modulus of Elasticity (young) GPa 320
Impact Resistance MPa m1/2 6.7
Weibull Modulus m 15
Vickers Hardness HV 0.5 1,650
Thermal Expansion Coefficient 10-6 K-1 3.4
Thermal Conductivity W/mK 22
Thermal Shock Resistance ∆T °C 750
Maximum Use Temperature °C 1,300
Volume Resistivity at 20°C Ωcm >1011
Dielectric Strength kV/mm 20
Dielectric Constant εr -
Dielectric Loss Angle at 20°C, 1MHz tanδ -
These properties were measured on test samples. The values are typical material properties and may vary according to product configuration, geometry and manufacturing process.