Potassium Bromide vs. Beryllia
Potassium bromide belongs to the non-glass optical ceramics classification, while beryllia belongs to the oxide-based engineering ceramics. There are 12 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.
For each property being compared, the top bar is potassium bromide and the bottom bar is beryllia.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 24 | |
| 350 |
| Poisson's Ratio | 0.17 | |
| 0.26 |
| Shear Modulus, GPa | 7.0 | |
| 180 |
Thermal Properties
| Specific Heat Capacity, J/kg-K | 450 | |
| 1050 |
| Thermal Conductivity, W/m-K | 4.8 | |
| 270 |
| Thermal Expansion, µm/m-K | 39 | |
| 8.0 |
Electrical Properties
| Dielectric Constant (Relative Permittivity) At 1 MHz | 4.9 | |
| 6.6 |
| Electrical Dissipation At 1 MHz | 0.00020 | |
| 0.00060 |
Otherwise Unclassified Properties
| Density, g/cm3 | 2.8 | |
| 2.9 |
Common Calculations
| Stiffness to Weight: Axial, points | 4.7 | |
| 67 |
| Stiffness to Weight: Bending, points | 35 | |
| 82 |
| Thermal Diffusivity, mm2/s | 3.9 | |
| 89 |