Preparation and Calculation of Variour Ionic Transport Properties in a Superionic Mixed Composite System [Cu2HgI4:0.2 AgI]:0.xCuI

A new superionic mixed composite system, [Cu2HgI4:0.2 AgI]:0.xCuI, (x=0.2, 0.4, 0.6 mol. wt. %), was prepared by conventional solid state reactions and [Cu2HgI4:0.2 AgI] mixed system was used as the host. Electrical conductivity was measured to study the transition behavior at frequencies of 100 Hz, 120 Hz, 1 kHz, and 10 kHz in the temperature range 90°-170 °C by a Gen Rad 1659 RLC Digibridge. Conductivity increased sharply during the B-? phase transition. As a result of increase in the dopant-to-host ratio, the conductivity of the system exhibited Arrhenius (thermally activated)-type behavior. The phase transition temperature increased with an increase in the dopant concentration. Activation energies for the system in eV both for the pre-transition and post-transition phase transformations are reported. The addition of CuI to [Cu2HgI4:0.2 AgI] shifted the phase transition of the host [Cu2HgI4:0.2 AgI], due to an interaction between [Cu2HgI4:0.2 AgI] and CuI