Dielectric materials and their permittivity
| Material | Relative Permittivity (εᵣ) |
|---|---|
| Vacuum | 1.0000 |
| Air | 1.0006 |
| Teflon | 2.1 - 2.3 |
| Paper | 2.5 - 3.5 |
| Glass | 4.5 - 8.5 |
| Bakelite | 3.5 - 5.0 |
| Silicon | 11.7 - 12.1 |
| Aluminum Oxide (Al₂O₃) | 8.5 - 10.0 |
| Water | 78.4 |
| Ethanol | 24.3 |
| Mineral Oil | 2.0 - 2.3 |
| Silicone Oil | 2.7 - 3.3 |
| Transformer Oil | 2.2 - 2.5 |
| Vegetable Oil | 2.0 - 3.0 |
| Synthetic Oil | 2.0 - 4.0 |