High-alumina Refractory vs. Synthetic Sapphire
Both high-alumina refractory and synthetic sapphire are oxide-based engineering ceramics. There are 7 material properties with values for both materials. Properties with values for just one material (19, in this case) are not shown.
For each property being compared, the top bar is high-alumina refractory and the bottom bar is synthetic sapphire.
Metric UnitsUS Customary Units
Material Properties
| Density, g/cm3 | 2.1 | |
| 4.0 |
| Flexural Strength, MPa | 28 | |
| 1090 |
| Maximum Temperature: Mechanical, °C | 1200 | |
| 2000 |
| Specific Heat Capacity, J/kg-K | 800 | |
| 760 |
| Thermal Conductivity, W/m-K | 1.5 | |
| 30 |
| Thermal Diffusivity, mm2/s | 0.87 | |
| 9.9 |
| Thermal Expansion, µm/m-K | 4.3 | |
| 5.3 |