SiAlON is a non-oxide engineering ceramic material.

Material Properties

Compressive (Crushing) Strength2620 MPa (380 x 103 psi)

Density3.3 g/cm3 (210 lb/ft3)

Dielectric Constant (Relative Permittivity) At 1 MHz9.3

Dielectric Strength (Breakdown Potential)8.3 kV/mm (0.32 V/mil)

Elastic (Young's, Tensile) Modulus290 GPa (42 x 106 psi)

Electrical Resistivity Order of Magnitude14 10x Ω-m

Flexural Strength680 MPa (99 x 103 psi)

Fracture Toughness6.3 MPa-m1/2

Knoop Hardness1700

Maximum Thermal Shock300 °C (570 °F)

Poisson's Ratio0.23

Shear Modulus120 GPa (17 x 106 psi)

Specific Heat Capacity880 J/kg-K

Strength to Weight Ratio58 kN-m/kg

Tensile Strength: Ultimate (UTS)190 MPa (28 x 103 psi)

Thermal Conductivity19 W/m-K

Thermal Diffusivity6.5 m2/s

Thermal Expansion3.6 µm/m-K

The length of each bar compares the given value to the highest value in the database.

Further Reading

Silicon Nitride and the Sialons, Vivien Mitchell, 1993