High-silica Glass vs. PEEK
High-silica glass and PEEK belong to fundamentally different material chemistries. High-silica glass is a ceramic material, while PEEK is polymeric. Therefore, their performance will be even more dissimilar than would be suggested by the difference in properties. There are 8 material properties with values for both materials. Properties with values for just one material (25, in this case) are not shown.
For each property being compared, the top bar is high-silica glass and the bottom bar is PEEK.
Metric UnitsUS Customary Units
Material Properties
| Density, g/cm3 | 2.4 | |
| 1.3 to 1.5 |
| Elastic (Young's, Tensile) Modulus, GPa | 78 | |
| 4.0 to 24 |
| Electrical Resistivity Order of Magnitude, 10x Ω-m | 12 | |
| 3.0 to 14 |
| Flexural Strength, MPa | 34 | |
| 150 to 330 |
| Glass Transition Temperature, °C | 650 to 800 | |
| 240 |
| Stiffness to Weight: Axial, points | 19 | |
| 1.5 to 10 |
| Stiffness to Weight: Bending, points | 61 | |
| 36 to 73 |
| Thermal Expansion, µm/m-K | 0.6 to 0.75 | |
| 15 to 52 |