Mullite vs. Titanium Diboride
Mullite belongs to the oxide-based engineering ceramics classification, while titanium diboride belongs to the non-oxide engineering ceramics. There are 20 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.
For each property being compared, the top bar is mullite and the bottom bar is titanium diboride.
Metric UnitsUS Customary Units
Mechanical Properties
| Compressive (Crushing) Strength, MPa | 800 | |
| 3540 |
| Elastic (Young's, Tensile) Modulus, GPa | 110 to 170 | |
| 290 |
| Flexural Strength, MPa | 130 to 160 | |
| 380 |
| Fracture Toughness, MPa-m1/2 | 2.0 | |
| 6.5 |
| Knoop Hardness | 750 | |
| 2800 |
| Poisson's Ratio | 0.25 | |
| 0.11 |
| Tensile Strength: Ultimate (UTS), MPa | 160 | |
| 280 |
Thermal Properties
| Maximum Temperature: Mechanical, °C | 1680 | |
| 1270 |
| Maximum Thermal Shock, °C | 170 to 230 | |
| 110 |
| Specific Heat Capacity, J/kg-K | 950 | |
| 870 |
| Thermal Conductivity, W/m-K | 3.5 to 11 | |
| 58 |
| Thermal Expansion, µm/m-K | 5.8 | |
| 8.0 |
Electrical Properties
| Electrical Resistivity Order of Magnitude, 10x Ω-m | 10 to 11 | |
| -6.5 |
Otherwise Unclassified Properties
| Density, g/cm3 | 2.7 to 3.0 | |
| 4.5 |
Common Calculations
| Stiffness to Weight: Axial, points | 22 to 31 | |
| 35 |
| Stiffness to Weight: Bending, points | 58 to 62 | |
| 49 |
| Strength to Weight: Axial, points | 15 to 17 | |
| 17 |
| Strength to Weight: Bending, points | 22 to 24 | |
| 21 |
| Thermal Diffusivity, mm2/s | 1.4 to 3.7 | |
| 15 |
| Thermal Shock Resistance, points | 12 to 19 | |
| 8.7 |