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Potassium Chloride vs. Infrared Transmitting Glass

Potassium chloride belongs to the non-glass optical ceramics classification, while infrared transmitting glass belongs to the glass and glass-ceramics. There are 10 material properties with values for both materials. Properties with values for just one material (6, 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 potassium chloride and the bottom bar is infrared transmitting glass.

Metric UnitsUS Customary Units

Material Properties

Density, g/cm3 2.0
4.4 to 4.8
Elastic (Young's, Tensile) Modulus, GPa 28
18 to 63
Poisson's Ratio 0.18
0.28 to 0.3
Refractive Index 1.6
1.8 to 2.1
Specific Heat Capacity, J/kg-K 690
360 to 430
Stiffness to Weight: Axial, points 7.7
2.3 to 7.3
Stiffness to Weight: Bending, points 51
20 to 28
Thermal Conductivity, W/m-K 6.5
0.0060 to 0.23
Thermal Diffusivity, mm2/s 4.7
0.0029 to 0.14
Thermal Expansion, µm/m-K 36
9.0 to 17