ESD Silicon Carbide vs. Silicon Nitride

Both ESD silicon carbide and silicon nitride are non-oxide engineering ceramics. There are 14 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is ESD silicon carbide and the bottom bar is silicon nitride.

ESD-Safe Silicon Carbide Silicon Nitride (Si₃N₄)

Metric UnitsUS Customary Units

Mechanical Properties

Compressive (Crushing) Strength, MPa		3900
Compressive (Crushing) Strength, MPa		600 to 2950

Elastic (Young's, Tensile) Modulus, GPa		420
Elastic (Young's, Tensile) Modulus, GPa		140 to 310

Flexural Strength, MPa		490
Flexural Strength, MPa		130 to 810

Fracture Toughness, MPa-m^1/2		3.9
Fracture Toughness, MPa-m^1/2		3.1 to 6.2

Poisson's Ratio		0.14
Poisson's Ratio		0.24 to 0.27

Thermal Properties

Maximum Temperature: Mechanical, °C		500
Maximum Temperature: Mechanical, °C		1000 to 1330

Specific Heat Capacity, J/kg-K		750
Specific Heat Capacity, J/kg-K		720 to 800

Thermal Conductivity, W/m-K		140
Thermal Conductivity, W/m-K		12 to 31

Thermal Expansion, µm/m-K		4.5
Thermal Expansion, µm/m-K		2.5 to 3.2

Electrical Properties

Electrical Resistivity Order of Magnitude, 10^x Ω-m		3.3
Electrical Resistivity Order of Magnitude, 10^x Ω-m		11 to 12

Otherwise Unclassified Properties

Density, g/cm³		3.2
Density, g/cm³		2.2 to 3.4

Common Calculations

Stiffness to Weight: Axial, points		73
Stiffness to Weight: Axial, points		34 to 53

Stiffness to Weight: Bending, points		79
Stiffness to Weight: Bending, points		65 to 78

Thermal Diffusivity, mm²/s		60
Thermal Diffusivity, mm²/s		7.5 to 13