The ionic conductivity of AgI-montmorillonite composites was studied at a temperature ranging from 35 to 520 °C. Composites with montmorillonite as small as 0.89 w/o exhibited a maximum of about eight times the conductivity of the pure β-AgI at low temperatures. These results, which can be ascribed to the large surface area of the clay, may be qualitatively explained on the basis of a stabilisation of the low-temperature, higher-conducting metastable γ-phase of AgI. © 2003 Elsevier B.V. All rights reserved.
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