Abstract
The shapes and widths of mechanical and electrical relaxation peaks are compared for Ag+ ion conducting glasses and Na-beta-alumina. The electrical relaxation peaks, in the form of the imaginary part of the electric modulus, M″, against either temperature at fixed frequency or against frequency at fixed temperature, are sensitive to both the mobile ion concentration and to the magnitude of the exponent, n, that characterises the non-exponential nature of the relaxation process. The mechanical relaxation peak shapes depend only on the parameter n. Care is required in interpreting the temperature dependence of the frequency of the maximum in the M" peak, especially if either the carrier concentration or the parameter n is also temperature dependent.
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