Preparation, Characterization of a new Fast ionic Conductor [Ag2CdI4:0.xRbI] where (x = 0.1, 0.2 and 0.3 mol. wt. %)
Publication Date : 29/12/2016
Considerable effort has been taken to the development of new Rb+ ion conducting composite fast ionic systems, [Ag2CdI4:0.xRbI] (where x = 0.1, 0.2 and 0.3 mol. wt. %), were prepared, using [Ag2CdI4] mixed composite system as the host. [Ag2CdI4] compound belongs to the fast ion conductors of A2BX4 (A = Ag, Cu, B = Hg, Cd, Zn, Pb and others). The compound [Ag2CdI4] becomes superionic near 388K as the crystal lattice changes from a tetragonal to a hexagonal structure. Near 445K, [Ag2CdI4] is replaced by an equilibrium mixture of α-AgI and CdI2. At each of these phase transition, ionic conductivity increases by an order of magnitude or more. The substitution of Cd++ from Ag+ in [Ag2CdI4] is accompanied by a slight increase in the room temperature conductivity, as a result of either increased crystalline defects or an increased Rb+ substitution also characterized. FTIR, FAR-IR, SEM and EDAX analyses were performed to confirm the formation of fast ion conductors [Ag2CdI4:0.xRbI] (where x = 0.1, 0.2 and 0.3 mol. wt. %).
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