Mullite vs. Infrared Transmitting Glass
Mullite belongs to the oxide-based engineering ceramics classification, while infrared transmitting glass belongs to the glass and glass-ceramics. There are 10 material properties with values for both materials. Properties with values for just one material (15, in this case) are not shown.
For each property being compared, the top bar is mullite and the bottom bar is infrared transmitting glass.
Metric UnitsUS Customary Units
Material Properties
| Density, g/cm3 | 2.7 to 3.0 | |
| 4.4 to 4.8 |
| Elastic (Young's, Tensile) Modulus, GPa | 110 to 170 | |
| 18 to 63 |
| Flexural Strength, MPa | 130 to 160 | |
| 20 to 79 |
| Poisson's Ratio | 0.25 | |
| 0.28 to 0.3 |
| Specific Heat Capacity, J/kg-K | 950 | |
| 360 to 430 |
| Stiffness to Weight: Axial, points | 22 to 31 | |
| 2.3 to 7.3 |
| Stiffness to Weight: Bending, points | 58 to 62 | |
| 20 to 28 |
| Thermal Conductivity, W/m-K | 3.5 to 11 | |
| 0.0060 to 0.23 |
| Thermal Diffusivity, mm2/s | 1.4 to 3.7 | |
| 0.0029 to 0.14 |
| Thermal Expansion, µm/m-K | 5.8 | |
| 9.0 to 17 |