Characterization of CaTi0.9Fe0.1O3/La0.98Mg0.02NbO4 composite

Abstract

Abstract:A composite of CaTi 0 9 Fe 0 1 O 3 and electrolyte material, i.e. magnesium doped La 0 98 Mg 0 02 NbO 4 was prepared and studied. The phase content and the sample microstructure was examined by an X-ray diffraction method and scanning electron microscopy. EDS measurements were done both for composite samples and the diffusion couple. The electrical properties were studied by four terminal DC method. The hightemperature interaction between the two components of the composite has been observed. It has been suggested that lanthanum diffused into the perovskite phase and substituted for calcium whereas calcium and niobium formed the Ca 2 Nb 2 O 7 pyrochlore phase. At 1500℃ very large crystallites of the pyrochlore were observed. Regardless of strong interaction between the composite components, its total conductivity was weakly dependent on the sintering temperature. PACS

Effect of substitution on the structural, electrical properties, and dielectric relaxor behavior in lead-free BiFeO3-based ceramics

“…The experimental curves were fitted according to the Vogel–Fulcher formula, which is described by a relation similar to that recognized for cluster glasses. It can be estimated by: 69 where T VF is the freezing temperature. The obtained parameters from the best fit to the data ( Fig.…”