Optical Silicon vs. Limestone
Optical silicon belongs to the non-glass optical ceramics classification, while limestone belongs to the natural stone. There are 16 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.
For each property being compared, the top bar is optical silicon and the bottom bar is limestone.
Metric UnitsUS Customary Units
Mechanical Properties
| Compressive (Crushing) Strength, MPa | 120 | |
| 700 |
| Elastic (Young's, Tensile) Modulus, GPa | 150 | |
| 77 |
| Poisson's Ratio | 0.28 | |
| 0.25 |
| Shear Modulus, GPa | 80 | |
| 30 |
| Tensile Strength: Ultimate (UTS), MPa | 110 | |
| 100 |
Thermal Properties
| Maximum Temperature: Mechanical, °C | 1350 | |
| 360 |
| Specific Heat Capacity, J/kg-K | 700 | |
| 920 |
| Thermal Conductivity, W/m-K | 150 | |
| 2.1 |
| Thermal Expansion, µm/m-K | 3.0 | |
| 8.0 |
Otherwise Unclassified Properties
| Density, g/cm3 | 2.3 | |
| 2.6 |
Common Calculations
| Stiffness to Weight: Axial, points | 35 | |
| 16 |
| Stiffness to Weight: Bending, points | 75 | |
| 55 |
| Strength to Weight: Axial, points | 13 | |
| 11 |
| Strength to Weight: Bending, points | 22 | |
| 18 |
| Thermal Diffusivity, mm2/s | 93 | |
| 0.88 |
| Thermal Shock Resistance, points | 18 | |
| 12 |