High-silica Glass vs. Engineering Porcelain
High-silica glass belongs to the glass and glass-ceramics classification, while engineering porcelain belongs to the oxide-based engineering 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 high-silica glass and the bottom bar is engineering porcelain.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 78 | |
| 67 to 150 |
| Flexural Strength, MPa | 34 | |
| 43 to 160 |
Thermal Properties
| Thermal Expansion, µm/m-K | 0.6 to 0.75 | |
| 2.0 to 6.6 |
Electrical Properties
| Dielectric Constant (Relative Permittivity) At 1 Hz | 3.8 | |
| 5.0 to 10 |
| Dielectric Strength (Breakdown Potential), kV/mm | 34 | |
| 11 to 25 |
| Electrical Dissipation At 1 Hz | 0.00044 to 0.00087 | |
| 0.0043 to 0.028 |
| Electrical Dissipation At 1 MHz | 0.00044 to 0.00088 | |
| 0.00043 to 0.013 |
| Electrical Resistivity Order of Magnitude, 10x Ω-m | 12 | |
| 9.0 to 12 |
Otherwise Unclassified Properties
| Density, g/cm3 | 2.4 | |
| 2.3 to 3.0 |
Common Calculations
| Stiffness to Weight: Axial, points | 19 | |
| 16 to 29 |
| Stiffness to Weight: Bending, points | 61 | |
| 49 to 65 |