Electrical properties of Li2BiV5O15 ceramics

The polycrystalline sample of Li2BiV5O15 was prepared by a mixed-oxide method, relatively at low temperature (i.e., 550 °C). Room temperature XRD pattern confirms the formation of the compound with an orthorhombic crystal system. Studies of dielectric properties show that the compound exhibits an anomaly at 416 °C (usually called transition temperature) at 50 and 100 kHz, with diffuse-type phase transition. The electrical parameters of the material were studied using complex impedance spectroscopy in a wide temperature (30–500 °C) and frequency (102–106 Hz) range. The compound exhibits non-Debye of relaxation process. The activation energy of the material was found to be ∼1.08 eV in the high temperature region.