Alpha Quartz vs. Silicon Carbide
Alpha quartz belongs to the non-glass optical ceramics classification, while silicon carbide belongs to the non-oxide engineering ceramics. There are 10 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 alpha quartz and the bottom bar is silicon carbide.
Metric UnitsUS Customary Units
Material Properties
| Density, g/cm3 | 2.7 | |
| 3.0 to 3.2 |
| Elastic (Young's, Tensile) Modulus, GPa | 91 | |
| 370 to 490 |
| Knoop Hardness | 740 | |
| 2500 to 2900 |
| Poisson's Ratio | 0.13 | |
| 0.14 to 0.21 |
| Specific Heat Capacity, J/kg-K | 720 | |
| 670 to 1180 |
| Stiffness to Weight: Axial, points | 19 | |
| 69 to 84 |
| Stiffness to Weight: Bending, points | 57 | |
| 79 to 82 |
| Thermal Conductivity, W/m-K | 8.5 | |
| 120 to 170 |
| Thermal Diffusivity, mm2/s | 4.4 | |
| 38 to 79 |
| Thermal Expansion, µm/m-K | 9.5 | |
| 4.0 to 4.5 |