Alumina vs. Yttria
Both alumina and yttria are oxide-based engineering ceramics. There are 11 material properties with values for both materials. Properties with values for just one material (16, in this case) are not shown.
For each property being compared, the top bar is alumina and the bottom bar is yttria.
Metric UnitsUS Customary Units
Mechanical Properties
| Compressive (Crushing) Strength, MPa | 1920 to 2750 | |
| 390 |
| Elastic (Young's, Tensile) Modulus, GPa | 220 to 370 | |
| 120 |
Thermal Properties
| Maximum Temperature: Mechanical, °C | 650 to 1730 | |
| 2000 |
| Melting Onset (Solidus), °C | 2040 | |
| 2440 |
| Specific Heat Capacity, J/kg-K | 870 to 940 | |
| 440 |
| Thermal Conductivity, W/m-K | 14 to 30 | |
| 0.3 |
| Thermal Expansion, µm/m-K | 6.7 to 8.2 | |
| 8.0 |
Otherwise Unclassified Properties
| Density, g/cm3 | 3.4 to 4.1 | |
| 5.0 |
Common Calculations
| Stiffness to Weight: Axial, points | 35 to 53 | |
| 13 |
| Stiffness to Weight: Bending, points | 57 to 62 | |
| 32 |
| Thermal Diffusivity, mm2/s | 3.7 to 10 | |
| 0.14 |