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Gallium Arsenide vs. Engineering Porcelain

Gallium arsenide belongs to the non-glass optical ceramics classification, while engineering porcelain belongs to the oxide-based engineering ceramics. There are 10 material properties with values for both materials. Properties with values for just one material (20, 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 gallium arsenide and the bottom bar is engineering porcelain.

Metric UnitsUS Customary Units

Material Properties

Density, g/cm3 5.3
2.3 to 3.0
Elastic (Young's, Tensile) Modulus, GPa 85
67 to 150
Knoop Hardness 750
600
Poisson's Ratio 0.31
0.17
Specific Heat Capacity, J/kg-K 360
600 to 1000
Stiffness to Weight: Axial, points 8.9
16 to 29
Stiffness to Weight: Bending, points 28
49 to 65
Thermal Conductivity, W/m-K 47
1.8 to 6.5
Thermal Diffusivity, mm2/s 25
0.73 to 3.9
Thermal Expansion, µm/m-K 5.6
2.0 to 6.6