Abstract
AgI-based fast-ion conducting glasses with very high AgIcompositions from the (AgI)x(AgPO3)1−x,(AgI)x(Ag2PO3.5)1−x,and (AgI)x(Ag3PO4)1−xsystems were prepared successfully by using a rapid-press quenchingand a twin-roller quenching method. The ac dielectric measurementsshowed common relaxation properties of Ag+-ionconduction in the glasses independently of the species of the glass network formers of AgPO3, Ag2PO3.5, andAg3PO4,and the activation energies, Δεa, for Ag+-ionconduction were observed to converge upon the same magnitude of ∼26 kJ mol−1 at the AgIcomposition limit of x = 1.This indicates the formation of amorphous AgI regions in the glasses,and the value of Δεa = 26 ± 1 kJ mol−1estimated at x = 1was concluded to correspond to that for bulk amorphous AgI which has neverbeen obtained experimentally.
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