Abstract
In this work, we are focused to study the structural, vibrational and electrical properties of K2ZnGeO4 ceramic compound. The KZGO was prepared by conventional solid-state method. X-ray diffraction (XRD) analysis reveals that the sample is well crystallized in the orthorhombic structure with Pca21 space group. Moreover, IR spectrum for this compound confirm the presence of group functionally [GeO4]4-. The electrical measurements was studied in the 40 Hz–1 MHz frequency interval and 533–653 K temperature range. AC conductivity of K2ZnGeO4 is showed on the basis of the overlapping large polaron tunneling (OLPT) model. The activation energy calculated from both the DC conductivity and modulus spectra are close quite to notify that the electrical conductivity and the relaxation process are attributed to the same effect. Thermodynamic parameters for instance the enthalpy ΔH, and the change in entropy ΔS and the free energy of activation ΔF have been determined.
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