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Cork vs. Silicon Nitride

Cork and silicon nitride belong to fundamentally different material chemistries. Cork is a polymeric material, while silicon nitride is ceramic. Therefore, their performance will be even more dissimilar than would be suggested by the difference in properties. There are 10 material properties with values for both materials. Properties with values for just one material (13, in this case) are not shown. Please note that the two materials have significantly dissimilar densities. This means that additional care is required when interpreting the data, because some material properties are based on units of mass, while others are based on units of area or volume.

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

Metric UnitsUS Customary Units

Material Properties

Compressive (Crushing) Strength, MPa 1.0
600 to 2950
Density, g/cm3 0.15
2.2 to 3.4
Dielectric Strength (Breakdown Potential), kV/mm 1.5
18
Elastic (Young's, Tensile) Modulus, GPa 0.020
140 to 310
Specific Heat Capacity, J/kg-K 2000
720 to 800
Stiffness to Weight: Axial, points 0.074
34 to 53
Stiffness to Weight: Bending, points 60
65 to 78
Thermal Conductivity, W/m-K 0.040
12 to 31
Thermal Diffusivity, mm2/s 0.13
7.5 to 13
Thermal Expansion, µm/m-K 200
2.5 to 3.2