Abstract
Fast ionic solid specimens of a new binary system namely (BiI3) x –(Ag2CrO4)100−x , where x = 10, 20, 30, 40, 50, 60, 70, 80, and 90 mol%, were synthesized by melt quenching method. Detailed structural, thermal, and electrical transport properties evaluated by means of X-ray diffraction analysis, Fourier transform infrared spectroscopic investigations, and differential scanning calorimetry in conjunction with complex impedance analysis carried out over the frequency range 1 MHz–20 Hz and in the temperature region 298–430 K indicated the composite nature of such superionic solids consisting of glassy and crystalline phases and possessing electrical conductivities of the order 10−6–10−3 Scm−1 at 298 K. The best conducting composition of the present binary system has been identified as the specimen containing 30 mol% BiI3 and exhibiting a room-temperature electrical conductivity of 7.1 × 10−3 Scm−1 with an activation energy of 0.12 eV for silver ionic transport as confirmed by Wagner's polarization and E.M.F. techniques.
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