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Potassium Chloride vs. Silicon Nitride

Potassium chloride belongs to the non-glass optical ceramics classification, while silicon nitride belongs to the non-oxide engineering ceramics. There are 10 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.

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

Metric UnitsUS Customary Units

Material Properties

Density, g/cm3 2.0
2.2 to 3.4
Dielectric Constant (Relative Permittivity) At 1 MHz 4.6
8.0 to 10
Elastic (Young's, Tensile) Modulus, GPa 28
140 to 310
Poisson's Ratio 0.18
0.24 to 0.27
Specific Heat Capacity, J/kg-K 690
720 to 800
Stiffness to Weight: Axial, points 7.7
34 to 53
Stiffness to Weight: Bending, points 51
65 to 78
Thermal Conductivity, W/m-K 6.5
12 to 31
Thermal Diffusivity, mm2/s 4.7
7.5 to 13
Thermal Expansion, µm/m-K 36
2.5 to 3.2