Potassium Bromide vs. Soda-lime Glass
Potassium bromide belongs to the non-glass optical ceramics classification, while soda-lime glass belongs to the glass and glass-ceramics. There are 13 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.
For each property being compared, the top bar is potassium bromide and the bottom bar is soda-lime glass.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 24 | |
| 70 to 71 |
| Poisson's Ratio | 0.17 | |
| 0.23 |
| Shear Modulus, GPa | 7.0 | |
| 29 |
Thermal Properties
| Specific Heat Capacity, J/kg-K | 450 | |
| 720 to 800 |
| Thermal Conductivity, W/m-K | 4.8 | |
| 1.0 to 1.1 |
| Thermal Expansion, µm/m-K | 39 | |
| 8.8 to 9.0 |
Electrical Properties
| Dielectric Constant (Relative Permittivity) At 1 MHz | 4.9 | |
| 7.3 to 7.4 |
Otherwise Unclassified Properties
| Density, g/cm3 | 2.8 | |
| 2.4 |
| Light Transmission Range, µm | 0.22 to 26 | |
| 0.35 to 2.5 |
| Refractive Index | 1.8 | |
| 1.5 |
Common Calculations
| Stiffness to Weight: Axial, points | 4.7 | |
| 16 |
| Stiffness to Weight: Bending, points | 35 | |
| 56 |
| Thermal Diffusivity, mm2/s | 3.9 | |
| 0.51 to 0.6 |