This Table contains the relative permittivity values for a variety of dielectrics.  Many of these dielectrics are materials that can vary significantly in manufacturing and the dielectric constant may also vary accordingly. Consequently, the relative permittivity of these dielectrics are best represented by ranges.  Were a range of relative permittivity was found we have entered in this data set the center value in the range as a representative value.

These relative permittivity data are used in the equation, Coulomb's Law with Dielectric Effect.

Notes

Permittivity is a property of a material that reflects the force between component charges in the material.  The relative permittivity , or dielectric permittivity of a materiel, is a ratio of the material's permittivity relative to the permittivity of vacuum, `epsilon_0`.

If you place a dielectric material between two conducting plates with an electric potential between them, the permittivity defines the  energy stored in the material per unit voltage. So, relative permittivity is the ratio of the capacitance of a capacitor dependent on the dielectric material of the capacitor, compared to a similar capacitor that has vacuum as its dielectric.