Dielectric studies. Part 12.—Derivation of relaxation times from microwave data

Abstract

An assessment is made of the errors in the dielectric constant ε′ and loss ε″ determined at five microwave frequencies by a bridge technique for dilute solutions of polar substances. Analysis of these data into relaxation parameters τ₁, τ₂ and C₁ is discussed for systems which are characterized by two relaxation processes of the Debye type. Sources of error are considered and estimates have been made of the accuracy of analysis. The dielectric data from two mixtures have been analyzed and each yields τ₁, τ₂ and C₁ values in reasonable agreement with the known values.