| 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. |