MakeItFrom.com
Menu (ESC)

Magnesium Fluoride vs. Potassium Bromide

Both magnesium fluoride and potassium bromide are non-glass optical ceramics. There are 14 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.

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

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 130
24
Poisson's Ratio 0.27
0.17
Shear Modulus, GPa 76
7.0

Thermal Properties

Melting Onset (Solidus), °C 1260
730
Specific Heat Capacity, J/kg-K 980
450
Thermal Conductivity, W/m-K 28
4.8
Thermal Expansion, µm/m-K 11
39

Electrical Properties

Dielectric Constant (Relative Permittivity) At 1 MHz 5.2
4.9

Otherwise Unclassified Properties

Density, g/cm3 3.2
2.8
Light Transmission Range, µm 0.12 to 7.0
0.22 to 26
Refractive Index 1.4
1.8

Common Calculations

Stiffness to Weight: Axial, points 22
4.7
Stiffness to Weight: Bending, points 52
35
Thermal Diffusivity, mm2/s 8.8
3.9