Electrical properties of Li2BiV5O15 ceramics

Abstract: 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 100kHz, 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 ∼1.08eV in the high temperature region. [Copyright &y& Elsevier]