Identification of giant dielectric permittivity in the BiVO4

In this work the BiVO4 ceramic matrix was prepared by the conventional solid-state reaction. The phase was calcined at 500 °C, sintered at 800 °C and characterized by X-ray Diffraction (XRD). The obtained phase presents a scheelite ABO4 structure. For this particular structure scanning electron microscopic analysis was performed. The dielectric properties were investigated in the temperature range from 220 to 460 °C in radio-frequency (1 Hz-1 MHz). The sample display giant dielectric permittivity (ε′ > 2 × 106) behavior which might be relevant for future technological applications.