Optical Silicon vs. C-820 Magnesia Ceramic
Optical silicon belongs to the non-glass optical ceramics classification, while C-820 magnesia ceramic belongs to the oxide-based engineering 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 optical silicon and the bottom bar is C-820 magnesia ceramic.
Metric UnitsUS Customary Units
Material Properties
| Density, g/cm3 | 2.3 | |
| 2.7 |
| Dielectric Constant (Relative Permittivity) At 1 MHz | 12 | |
| 9.6 |
| Elastic (Young's, Tensile) Modulus, GPa | 150 | |
| 100 |
| Flexural Strength, MPa | 300 | |
| 53 |
| Specific Heat Capacity, J/kg-K | 700 | |
| 950 |
| Stiffness to Weight: Axial, points | 35 | |
| 21 |
| Stiffness to Weight: Bending, points | 75 | |
| 58 |
| Thermal Conductivity, W/m-K | 150 | |
| 8.0 |
| Thermal Diffusivity, mm2/s | 93 | |
| 3.1 |
| Thermal Expansion, µm/m-K | 3.0 | |
| 11 |