Abstract
New vitreous conductors, shown in the TeO2-Tl2O-AgI system, are described. The ionic conductivity in these glasses increases with the AgI content. Structure consists of a covalent TeO2-Tl2O network and a AgI sublattice with only a weak interaction between them. The AgI-TlI system offers a deep eutectic for the (AgI)0.75(TlI)0.25 composition with a melting point at 220°C. This favourable medium has been selected to prepare new silver FIC glasses. So, glasses belonging to the pseudo quaternary TeO2-Tl2O-AgI-TlI system have been elaborated : the study of transport properties of [TeO2-TlO0.5]1-x [(AgI)0.75 (TlI)0.25]x glasses has shown a very high ionic conductivity for [MATH]. The influence of the Tl+ ions presence on the Ag+ ions mobility is discussed.
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