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Potassium Chloride vs. Gallium Arsenide

Both potassium chloride and gallium arsenide are non-glass optical ceramics. There are 12 material properties with values for both materials. Properties with values for just one material (4, 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 gallium arsenide.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 28
85
Poisson's Ratio 0.18
0.31

Thermal Properties

Melting Onset (Solidus), °C 780
1400
Specific Heat Capacity, J/kg-K 690
360
Thermal Conductivity, W/m-K 6.5
47
Thermal Expansion, µm/m-K 36
5.6

Otherwise Unclassified Properties

Density, g/cm3 2.0
5.3
Light Transmission Range, µm 0.21 to 20
1.0 to 16
Refractive Index 1.6
3.4

Common Calculations

Stiffness to Weight: Axial, points 7.7
8.9
Stiffness to Weight: Bending, points 51
28
Thermal Diffusivity, mm2/s 4.7
25