Titanium Diboride vs. Synthetic Sapphire
Titanium diboride belongs to the non-oxide engineering ceramics classification, while synthetic sapphire belongs to the oxide-based engineering ceramics. There are 19 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.
For each property being compared, the top bar is titanium diboride and the bottom bar is synthetic sapphire.
Metric UnitsUS Customary Units
Mechanical Properties
| Compressive (Crushing) Strength, MPa | 3540 | |
| 2700 |
| Elastic (Young's, Tensile) Modulus, GPa | 290 | |
| 450 |
| Flexural Strength, MPa | 380 | |
| 1090 |
| Fracture Toughness, MPa-m1/2 | 6.5 | |
| 1.9 |
| Knoop Hardness | 2800 | |
| 1860 |
| Poisson's Ratio | 0.11 | |
| 0.28 |
| Tensile Strength: Ultimate (UTS), MPa | 280 | |
| 2470 |
Thermal Properties
| Maximum Temperature: Mechanical, °C | 1270 | |
| 2000 |
| Specific Heat Capacity, J/kg-K | 870 | |
| 760 |
| Thermal Conductivity, W/m-K | 58 | |
| 30 |
| Thermal Expansion, µm/m-K | 8.0 | |
| 5.3 |
Electrical Properties
| Electrical Resistivity Order of Magnitude, 10x Ω-m | -6.5 | |
| 17 |
Otherwise Unclassified Properties
| Density, g/cm3 | 4.5 | |
| 4.0 |
Common Calculations
| Stiffness to Weight: Axial, points | 35 | |
| 63 |
| Stiffness to Weight: Bending, points | 49 | |
| 64 |
| Strength to Weight: Axial, points | 17 | |
| 170 |
| Strength to Weight: Bending, points | 21 | |
| 100 |
| Thermal Diffusivity, mm2/s | 15 | |
| 9.9 |
| Thermal Shock Resistance, points | 8.7 | |
| 74 |