Engineering Porcelain vs. Alpha Quartz
Engineering porcelain belongs to the oxide-based engineering ceramics classification, while alpha quartz belongs to the non-glass optical ceramics. There are 11 material properties with values for both materials. Properties with values for just one material (19, in this case) are not shown.
For each property being compared, the top bar is engineering porcelain and the bottom bar is alpha quartz.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 67 to 150 | |
| 91 |
| Knoop Hardness | 600 | |
| 740 |
| Poisson's Ratio | 0.17 | |
| 0.13 |
| Shear Modulus, GPa | 34 | |
| 31 |
Thermal Properties
| Specific Heat Capacity, J/kg-K | 600 to 1000 | |
| 720 |
| Thermal Conductivity, W/m-K | 1.8 to 6.5 | |
| 8.5 |
| Thermal Expansion, µm/m-K | 2.0 to 6.6 | |
| 9.5 |
Otherwise Unclassified Properties
| Density, g/cm3 | 2.3 to 3.0 | |
| 2.7 |
Common Calculations
| Stiffness to Weight: Axial, points | 16 to 29 | |
| 19 |
| Stiffness to Weight: Bending, points | 49 to 65 | |
| 57 |
| Thermal Diffusivity, mm2/s | 0.73 to 3.9 | |
| 4.4 |