Calcium Fluoride vs. Potassium Bromide
Both calcium fluoride and potassium bromide are non-glass optical ceramics. There are 13 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.
For each property being compared, the top bar is calcium fluoride and the bottom bar is potassium bromide.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 80 | |
| 24 |
| Poisson's Ratio | 0.26 | |
| 0.17 |
| Shear Modulus, GPa | 34 | |
| 7.0 |
Thermal Properties
| Melting Onset (Solidus), °C | 1420 | |
| 730 |
| Specific Heat Capacity, J/kg-K | 860 | |
| 450 |
| Thermal Conductivity, W/m-K | 9.7 | |
| 4.8 |
| Thermal Expansion, µm/m-K | 19 | |
| 39 |
Otherwise Unclassified Properties
| Density, g/cm3 | 3.2 | |
| 2.8 |
| Light Transmission Range, µm | 0.15 to 9.0 | |
| 0.22 to 26 |
| Refractive Index | 1.4 | |
| 1.8 |
Common Calculations
| Stiffness to Weight: Axial, points | 14 | |
| 4.7 |
| Stiffness to Weight: Bending, points | 45 | |
| 35 |
| Thermal Diffusivity, mm2/s | 3.5 | |
| 3.9 |