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Soda-lime Glass vs. Gallium Arsenide

Soda-lime glass belongs to the glass and glass-ceramics classification, while gallium arsenide belongs to the non-glass optical ceramics. There are 12 material properties with values for both materials. Properties with values for just one material (9, 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 soda-lime glass and the bottom bar is gallium arsenide.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70 to 71
85
Knoop Hardness 570
750
Poisson's Ratio 0.23
0.31

Thermal Properties

Specific Heat Capacity, J/kg-K 720 to 800
360
Thermal Conductivity, W/m-K 1.0 to 1.1
47
Thermal Expansion, µm/m-K 8.8 to 9.0
5.6

Otherwise Unclassified Properties

Density, g/cm3 2.4
5.3
Light Transmission Range, µm 0.35 to 2.5
1.0 to 16
Refractive Index 1.5
3.4

Common Calculations

Stiffness to Weight: Axial, points 16
8.9
Stiffness to Weight: Bending, points 56
28
Thermal Diffusivity, mm2/s 0.51 to 0.6
25