Mullite vs. Potassium Bromide
Mullite belongs to the oxide-based engineering ceramics classification, while potassium bromide belongs to the non-glass optical ceramics. There are 11 material properties with values for both materials. Properties with values for just one material (17, in this case) are not shown.
For each property being compared, the top bar is mullite and the bottom bar is potassium bromide.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 110 to 170 | |
| 24 |
| Poisson's Ratio | 0.25 | |
| 0.17 |
Thermal Properties
| Specific Heat Capacity, J/kg-K | 950 | |
| 450 |
| Thermal Conductivity, W/m-K | 3.5 to 11 | |
| 4.8 |
| Thermal Expansion, µm/m-K | 5.8 | |
| 39 |
Electrical Properties
| Dielectric Constant (Relative Permittivity) At 1 MHz | 6.3 | |
| 4.9 |
| Electrical Dissipation At 1 MHz | 0.0025 | |
| 0.00020 |
Otherwise Unclassified Properties
| Density, g/cm3 | 2.7 to 3.0 | |
| 2.8 |
Common Calculations
| Stiffness to Weight: Axial, points | 22 to 31 | |
| 4.7 |
| Stiffness to Weight: Bending, points | 58 to 62 | |
| 35 |
| Thermal Diffusivity, mm2/s | 1.4 to 3.7 | |
| 3.9 |