Structural and electrical properties of Bi2La3Ti3FeO15 ceramics

The polycrystalline sample of Bi(2)La(3)Ti(3)FeO(15)was synthesized using a solid-state reaction technique. The formation, basic crystal data and crystalline nature of the compound have been determined by an X-ray diffraction technique at room temperature. Some characteristics (i.e., distribution, size and shape of grains, etc.) of surface microstructure of a pellet (obtained at room temperature using scanning electron microscopy) exhibit the formation of high-density sample. Dielectric and Complex impedance spectroscopy method was used to study electrical characteristics of the material. The material was found to have temperature dependence of electrical relaxation phenomena. Impedance measurements carried out in a wide temperature (30-500 A degrees C) and frequency (1-1000 kHz) ranges have provided many new and interesting results. The ac conductivity studied in the above ranges is found to obey Jonscher's universal power law. The results of the conduction mechanism of the sample has been analysed in terms of resistive and capacitive components of complex plane formalism and suitable equivalent circuits have been proposed for different regions.