Optical Silicon vs. Lead-alkali-silica Glass
Optical silicon belongs to the non-glass optical ceramics classification, while lead-alkali-silica glass belongs to the glass and glass-ceramics. There are 6 material properties with values for both materials. Properties with values for just one material (22, in this case) are not shown.
For each property being compared, the top bar is optical silicon and the bottom bar is lead-alkali-silica glass.
Metric UnitsUS Customary Units
Material Properties
| Density, g/cm3 | 2.3 | |
| 3.1 |
| Elastic (Young's, Tensile) Modulus, GPa | 150 | |
| 67 |
| Flexural Strength, MPa | 300 | |
| 34 |
| Stiffness to Weight: Axial, points | 35 | |
| 12 |
| Stiffness to Weight: Bending, points | 75 | |
| 43 |
| Thermal Expansion, µm/m-K | 3.0 | |
| 9.0 |