Low temperature conductivity and ion dynamics in silver iodide-silver metaphosphate glasses.

Author(s) Badr, L.
Journal Phys Chem Chem Phys
Date Published 2017 Aug 16
Abstract

Silver iodide-silver metaphosphate glasses xAgI·(1 - x)AgPO3 (x = 0.3, 0.4, and 0.5) have been prepared using the usual melt quenching method. Differential scanning calorimetry has been used to determine the glass transition temperature of the samples. Impedance spectroscopy spanning wide temperature (20 K to 200 K) and frequency (10(-1) Hz to 10(6) Hz) ranges has been employed to investigate the ion dynamics. At high temperatures, below the glass transition temperature and down to around 120 K, the dynamics show the usual behavior of dc and dispersed conductivity due to the random and correlated motion of the ions. The dc conductivity of the glasses varies dramatically and it increases with the AgI content as expected. At the lowest temperatures investigated, however, the conductivity of the glasses was indistinguishable. Hence, the low temperature dynamics are identical irrespective of the amount of AgI and the structure of the glass. In addition, a nearly constant loss behavior, independent of the temperature and composition, was attained at the lowest temperatures.

DOI 10.1039/c7cp03695g
ISSN 1463-9084
Citation Badr L. Low temperature conductivity and ion dynamics in silver iodide-silver metaphosphate glasses. Phys Chem Chem Phys. 2017;19(32):21527-21531.

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