Glass formation and electrical conductivity studies of AgI-Ag<inf>2</inf>O-[xMoO<inf>3</inf>+(1-x)V<inf>2</inf>O<inf>5</inf>] x=0.1 to 0.9 system

Analar grade MoO3, V2O5, Ag2O and AgI compounds have been mixed in different ratios to form the superionic conducting AgI-Ag2O-[xMoO3+(1-x)V2O5] (x=0.1 to 0.9) glasses by quenching the molten liquid in liquid nitrogen. The glassy nature of these materials have been identified from X-ray diffractogram spectra and the presence of molybdate and vanadate clusters have been identified from infrared spectra. The highest room temperature (306 K) conductivity was found to be 2.5×10-2 Ω-1 cm-1 for the particular composition of the two network formers (xMoO3+(1-x)V2O5, x=0.1). From the temperature variation of the best conductivity plot, the activation energy for the migration of silver (Ag+) ions was calculated to be 0.37 eV. Wagner's dc polarisation technique has been used to find the electronic conductivity of the glassy system and was found to be (1.587×10-7 Ω-1 cm-1) much less than the total conductivity. The transport number tAg+ has been evaluated from the total and the electronic conductivity values as 0.999. © 1988 Elsevier Science Publishers B.V. (North-Holland Physics Publishing Division).