Material | Dielectric Constant | | Vacuum | 1 | Glass | 5-10 | Mica | 3-6 | Mylar | 3.1 | Neoprene | 6.70 | Plexiglas | 3.40 | Polyethylene | 2.25 | Polyvinyl chloride | 3.18 | Teflon | 2.1 | Germanium | 16 | Strontiun titanate | 310 | Titanium dioxide (rutile) | 173 perp 86 para | Water | 80.4 | Glycerin | 42.5 | Liquid ammonia(-78°C | 25 | Benzene | 2.284 | Air(1 atm) | 1.00059 | Air(100 atm) | 1.0548 |
| The dielectric constant is the relative permittivity of a dielectric material. It is an important parameter in characterizing capacitors. |