PES vs. High-silica Glass
PES and high-silica glass belong to fundamentally different material chemistries. PES is a polymeric material, while high-silica glass is ceramic. Therefore, their performance will be even more dissimilar than would be suggested by the difference in properties. There are 12 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 PES and the bottom bar is high-silica glass.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 2.6 | |
| 78 |
| Flexural Strength, MPa | 130 | |
| 34 |
Thermal Properties
| Glass Transition Temperature, °C | 220 | |
| 650 to 800 |
| Thermal Expansion, µm/m-K | 53 | |
| 0.6 to 0.75 |
Electrical Properties
| Dielectric Constant (Relative Permittivity) At 1 Hz | 3.5 | |
| 3.8 |
| Dielectric Strength (Breakdown Potential), kV/mm | 16 | |
| 34 |
| Electrical Dissipation At 1 Hz | 0.0010 | |
| 0.00044 to 0.00087 |
| Electrical Dissipation At 1 MHz | 0.0035 | |
| 0.00044 to 0.00088 |
| Electrical Resistivity Order of Magnitude, 10x Ω-m | 15 | |
| 12 |
Otherwise Unclassified Properties
| Density, g/cm3 | 1.4 | |
| 2.4 |
Common Calculations
| Stiffness to Weight: Axial, points | 1.1 | |
| 19 |
| Stiffness to Weight: Bending, points | 33 | |
| 61 |