Synthetic Sapphire vs. Yttria
Both synthetic sapphire and yttria are oxide-based engineering ceramics. There are 12 material properties with values for both materials. Properties with values for just one material (13, in this case) are not shown.
For each property being compared, the top bar is synthetic sapphire and the bottom bar is yttria.
Metric UnitsUS Customary Units
Mechanical Properties
| Compressive (Crushing) Strength, MPa | 2700 | |
| 390 |
| Elastic (Young's, Tensile) Modulus, GPa | 450 | |
| 120 |
Thermal Properties
| Maximum Temperature: Mechanical, °C | 2000 | |
| 2000 |
| Melting Onset (Solidus), °C | 2050 | |
| 2440 |
| Specific Heat Capacity, J/kg-K | 760 | |
| 440 |
| Thermal Conductivity, W/m-K | 30 | |
| 0.3 |
| Thermal Expansion, µm/m-K | 5.3 | |
| 8.0 |
Otherwise Unclassified Properties
| Density, g/cm3 | 4.0 | |
| 5.0 |
| Light Transmission Range, µm | 0.17 to 5.5 | |
| 0.3 to 12 |
Common Calculations
| Stiffness to Weight: Axial, points | 63 | |
| 13 |
| Stiffness to Weight: Bending, points | 64 | |
| 32 |
| Thermal Diffusivity, mm2/s | 9.9 | |
| 0.14 |