Silicon Nitride vs. Graphite
Both silicon nitride and graphite are non-oxide engineering ceramics. There are 9 material properties with values for both materials. Properties with values for just one material (14, in this case) are not shown.
For each property being compared, the top bar is silicon nitride and the bottom bar is graphite.
Metric UnitsUS Customary Units
Material Properties
| Compressive (Crushing) Strength, MPa | 600 to 2950 | |
| 90 |
| Density, g/cm3 | 2.2 to 3.4 | |
| 1.8 |
| Elastic (Young's, Tensile) Modulus, GPa | 140 to 310 | |
| 21 |
| Flexural Strength, MPa | 130 to 810 | |
| 80 |
| Maximum Temperature: Mechanical, °C | 1000 to 1330 | |
| 220 |
| Stiffness to Weight: Axial, points | 34 to 53 | |
| 6.7 |
| Stiffness to Weight: Bending, points | 65 to 78 | |
| 53 |
| Thermal Conductivity, W/m-K | 12 to 31 | |
| 6.0 |
| Thermal Expansion, µm/m-K | 2.5 to 3.2 | |
| 4.9 |