PEEK vs. High-silica Glass
PEEK and high-silica glass belong to fundamentally different material chemistries. PEEK 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 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 PEEK and the bottom bar is high-silica glass.
Metric UnitsUS Customary Units
Material Properties
| Density, g/cm3 | 1.3 to 1.5 | |
| 2.4 |
| Elastic (Young's, Tensile) Modulus, GPa | 4.0 to 24 | |
| 78 |
| Electrical Resistivity Order of Magnitude, 10x Ω-m | 3.0 to 14 | |
| 12 |
| Flexural Strength, MPa | 150 to 330 | |
| 34 |
| Glass Transition Temperature, °C | 240 | |
| 650 to 800 |
| Stiffness to Weight: Axial, points | 1.5 to 10 | |
| 19 |
| Stiffness to Weight: Bending, points | 36 to 73 | |
| 61 |
| Thermal Expansion, µm/m-K | 15 to 52 | |
| 0.6 to 0.75 |