Abstract
The DC electrical conductivity, σ, is measured for the polycrystalline LiKSO 4 before and after γ-irradiation in the 300–700 K temperature range. The log σT–1000 /T dependence for the unirradiated LiKSO 4 reveals activation energy of conduction of 1.1 eV. A considerable decrease in the conductivity value accompanied by an increase in the activation energy is observed after γ-irradiation. The current density ( J)-electric field ( E) characteristics are measured at different temperatures in order to estimate the type of conduction dominated and the effect of the electric field ( E) upon the conductivity measurements of this material. Conduction parameters including Poole–Frenkel coefficient ( β PF), the depth of potential well ( ϕ P) and dielectric constant ( ε) have been determined. Isothermal annealing kinetics that investigated at different temperatures before and after γ-irradiation indicates that the electrical conductivity decreases with time increase and the annealing process is dominated by unique rate process.
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