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Potassium Chloride vs. Soda-lime Glass

Potassium chloride belongs to the non-glass optical ceramics classification, while soda-lime glass belongs to the glass and glass-ceramics. There are 13 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

For each property being compared, the top bar is potassium chloride and the bottom bar is soda-lime glass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 28
70 to 71
Poisson's Ratio 0.18
0.23
Shear Modulus, GPa 8.5
29

Thermal Properties

Specific Heat Capacity, J/kg-K 690
720 to 800
Thermal Conductivity, W/m-K 6.5
1.0 to 1.1
Thermal Expansion, µm/m-K 36
8.8 to 9.0

Electrical Properties

Dielectric Constant (Relative Permittivity) At 1 MHz 4.6
7.3 to 7.4

Otherwise Unclassified Properties

Density, g/cm3 2.0
2.4
Light Transmission Range, µm 0.21 to 20
0.35 to 2.5
Refractive Index 1.6
1.5

Common Calculations

Stiffness to Weight: Axial, points 7.7
16
Stiffness to Weight: Bending, points 51
56
Thermal Diffusivity, mm2/s 4.7
0.51 to 0.6