Engineering Porcelain vs. Alkali-lime-silica Glass
Engineering porcelain belongs to the oxide-based engineering ceramics classification, while alkali-lime-silica glass belongs to the glass and glass-ceramics. There are 11 material properties with values for both materials. Properties with values for just one material (17, in this case) are not shown.
For each property being compared, the top bar is engineering porcelain and the bottom bar is alkali-lime-silica glass.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 67 to 150 | |
| 78 |
| Flexural Strength, MPa | 43 to 160 | |
| 34 to 170 |
Thermal Properties
| Thermal Expansion, µm/m-K | 2.0 to 6.6 | |
| 9.0 |
Electrical Properties
| Dielectric Constant (Relative Permittivity) At 1 Hz | 5.0 to 10 | |
| 7.1 to 7.5 |
| Dielectric Strength (Breakdown Potential), kV/mm | 11 to 25 | |
| 28 |
| Electrical Dissipation At 1 Hz | 0.0043 to 0.028 | |
| 0.022 to 0.052 |
| Electrical Dissipation At 1 MHz | 0.00043 to 0.013 | |
| 0.0088 to 0.053 |
| Electrical Resistivity Order of Magnitude, 10x Ω-m | 9.0 to 12 | |
| 10 |
Otherwise Unclassified Properties
| Density, g/cm3 | 2.3 to 3.0 | |
| 2.7 |
Common Calculations
| Stiffness to Weight: Axial, points | 16 to 29 | |
| 16 |
| Stiffness to Weight: Bending, points | 49 to 65 | |
| 53 |