Material | Relative Permittivity - εr - 10-12 |
Acetaldehyde (41° F) | 21.8 |
Acetic Acid (68° F) | 6.2 |
Acetic Acid (36° F) | 4.1 |
Acetone (77° F) | 20.7 |
Material | ϵ r | Common uses |
Styrofoam 1 | 1.1 | |
Teflon 2 | 2.1 | |
Polyethylene | 2.3 | coaxial cable |
Polypropylene | 2.3 |
The relative permittivity (in older texts, dielectric constant) is the permittivity of a material expressed as a ratio with the electric permittivity of a vacuum. A dielectric is an insulating material, and the dielectric constant of an insulator measures the ability of the insulator to store electric energy in an electrical field.
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