Optical Silicon vs. High-alumina Refractory
Optical silicon belongs to the non-glass optical ceramics classification, while high-alumina refractory belongs to the oxide-based engineering ceramics. There are 7 material properties with values for both materials. Properties with values for just one material (17, in this case) are not shown.
For each property being compared, the top bar is optical silicon and the bottom bar is high-alumina refractory.
Metric UnitsUS Customary Units
Material Properties
| Density, g/cm3 | 2.3 | |
| 2.1 |
| Flexural Strength, MPa | 300 | |
| 28 |
| Maximum Temperature: Mechanical, °C | 1350 | |
| 1200 |
| Specific Heat Capacity, J/kg-K | 700 | |
| 800 |
| Thermal Conductivity, W/m-K | 150 | |
| 1.5 |
| Thermal Diffusivity, mm2/s | 93 | |
| 0.87 |
| Thermal Expansion, µm/m-K | 3.0 | |
| 4.3 |