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Magnesium Fluoride vs. Steatite

Magnesium fluoride belongs to the non-glass optical ceramics classification, while steatite belongs to the oxide-based engineering ceramics. There are 10 material properties with values for both materials. Properties with values for just one material (17, in this case) are not shown.

For each property being compared, the top bar is magnesium fluoride and the bottom bar is steatite.

Metric UnitsUS Customary Units

Material Properties

Density, g/cm3 3.2
1.9 to 2.8
Dielectric Constant (Relative Permittivity) At 1 MHz 5.2
5.7 to 6.5
Elastic (Young's, Tensile) Modulus, GPa 130
68 to 120
Poisson's Ratio 0.27
0.23
Specific Heat Capacity, J/kg-K 980
850 to 860
Stiffness to Weight: Axial, points 22
14 to 32
Stiffness to Weight: Bending, points 52
52 to 83
Thermal Conductivity, W/m-K 28
1.8 to 2.5
Thermal Diffusivity, mm2/s 8.8
0.79 to 1.1
Thermal Expansion, µm/m-K 11
7.0 to 9.0