Alpha Quartz vs. SiAlON
Alpha quartz belongs to the non-glass optical ceramics classification, while SiAlON belongs to the non-oxide engineering ceramics. There are 11 material properties with values for both materials. Properties with values for just one material (15, in this case) are not shown.
For each property being compared, the top bar is alpha quartz and the bottom bar is SiAlON.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 91 | |
| 290 |
| Knoop Hardness | 740 | |
| 1700 |
| Poisson's Ratio | 0.13 | |
| 0.23 |
| Shear Modulus, GPa | 31 | |
| 120 |
Thermal Properties
| Specific Heat Capacity, J/kg-K | 720 | |
| 880 |
| Thermal Conductivity, W/m-K | 8.5 | |
| 19 |
| Thermal Expansion, µm/m-K | 9.5 | |
| 3.6 |
Otherwise Unclassified Properties
| Density, g/cm3 | 2.7 | |
| 3.3 |
Common Calculations
| Stiffness to Weight: Axial, points | 19 | |
| 50 |
| Stiffness to Weight: Bending, points | 57 | |
| 67 |
| Thermal Diffusivity, mm2/s | 4.4 | |
| 6.4 |