dielectric loss factor

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dielectric loss factor (∈″) Related to the complex relative permittivity, ∈″ is a measure of the loss of energy in a dielectric material through conduction, slow polarization currents, and other dissipative phenomena. The peak value for a dielectric with no direct-current conductivity occurs at the relaxation frequency, which is temperature related. The maximum value can be used as an important measure of the dielectric properties of rocks and ice.