Ionic conductivity in MoO3-BaF2-AgI-LiF glasses

Glasses of 50 MoO3-20 BaF2-(30-x)AgI-xLiF where x = 10, 15, 20 and 25 mol% were prepared. The density, molar volume, DTA. IR. EPR and de electrical co nductivity of the obtained glasses were investigated. If the Lit ion concen trations was < 10 mol%, LiF contributed directly to the network. This cause d a decrease in the glass density, T-g, activation energy <Delta>E and elec tronic conduction, but improved the ionic conduction of the glasses. At con centrations greater than or equal to 10 mol%, an increased amount of Li+ an d F- ions are weakly bound in interstitial positions among the basic consti tuting units MoO6 and MoO4. An equation to calculate the jump distance delt a of the mobile Li+ and F- ions as a function of the ionic radius and the m olar volume of the glass was derived.