Synthesis and characterization of LiCo_(3/5)Mn_(2/5)VO_4 ceramics

摘要

Dielectric and a.c. conductivity properties of LiCo_(3/5)Mn_(2/5)VO_4 ceramic are investigated. This compound is prepared by solution-based chemical method and the formation is checked by X-ray diffraction (XRD) study. XRD analysis at room temperature shows an orthorhombic phase. Frequency dependence of dielectric constant (epsilon_r) at different temperatures shows a dispersive behavior at low frequencies. Temperature dependence of epsilon_r at different frequencies indicates the transition temperature (T_c) = 235 deg C, 245 deg C 257 deg C and 265 deg C with (epsilon_r)_(max). approx 3689,1373, 750 and 386 for 10, 50,100 and 200 kHz respectively. A.c conductivity analysis indicates that electrical conduction in the material is a thermally activated process.