Alpha Quartz vs. Infrared Transmitting Glass
Alpha quartz belongs to the non-glass optical 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 (5, in this case) are not shown.
For each property being compared, the top bar is alpha quartz and the bottom bar is infrared transmitting glass.
Metric UnitsUS Customary Units
Material Properties
| Density, g/cm3 | 2.7 | |
| 4.4 to 4.8 |
| Elastic (Young's, Tensile) Modulus, GPa | 91 | |
| 18 to 63 |
| Poisson's Ratio | 0.13 | |
| 0.28 to 0.3 |
| Refractive Index | 1.6 | |
| 1.8 to 2.1 |
| Specific Heat Capacity, J/kg-K | 720 | |
| 360 to 430 |
| Stiffness to Weight: Axial, points | 19 | |
| 2.3 to 7.3 |
| Stiffness to Weight: Bending, points | 57 | |
| 20 to 28 |
| Thermal Conductivity, W/m-K | 8.5 | |
| 0.0060 to 0.23 |
| Thermal Diffusivity, mm2/s | 4.4 | |
| 0.0029 to 0.14 |
| Thermal Expansion, µm/m-K | 9.5 | |
| 9.0 to 17 |