Magnesium Fluoride vs. Mullite
Magnesium fluoride belongs to the non-glass optical ceramics classification, while mullite belongs to the oxide-based engineering ceramics. There are 10 material properties with values for both materials. Properties with values for just one material (18, in this case) are not shown.
For each property being compared, the top bar is magnesium fluoride and the bottom bar is mullite.
Metric UnitsUS Customary Units
Material Properties
| Density, g/cm3 | 3.2 | |
| 2.7 to 3.0 |
| Dielectric Constant (Relative Permittivity) At 1 MHz | 5.2 | |
| 6.3 |
| Elastic (Young's, Tensile) Modulus, GPa | 130 | |
| 110 to 170 |
| Poisson's Ratio | 0.27 | |
| 0.25 |
| Specific Heat Capacity, J/kg-K | 980 | |
| 950 |
| Stiffness to Weight: Axial, points | 22 | |
| 22 to 31 |
| Stiffness to Weight: Bending, points | 52 | |
| 58 to 62 |
| Thermal Conductivity, W/m-K | 28 | |
| 3.5 to 11 |
| Thermal Diffusivity, mm2/s | 8.8 | |
| 1.4 to 3.7 |
| Thermal Expansion, µm/m-K | 11 | |
| 5.8 |