Structural, dielectric and electrical characteristics of lead-free scandium modified barium iron niobate: Ba(Fe0.5-x ScxNb0.5)O3

摘要: Abstract Scandium (Sc) modified barium iron niobates (i.e., Ba(Fe0.5-x ScxNb0.5)O3 (x = 0.03,0.05 and 0.07) (BFSN)) were synthesized by using a standard ceramic technology high-temperature solid-state reaction of mixed oxide route). The analysis room temperature X-ray diffraction data shows the monoclinic phase materials. dielectric impedance parameters measured in different (250C–500 °C) frequency (1 kHz-1 MHz) ranges. Detailed study dependent constant two anomalies; one may be related to ferroelectric paraelectric transition at about 249 °C another 368 °C due some extrinsic effects (due creation oxygen vacancies for variable oxidation states). grains grain boundary contributions resistive capacitive characteristics, activated polarization mechanisms are analysed. Leakage (J ~ E) characteristics illuminate bulk (ohms hopping charge carriers and, space limited) conduction processes samples. With increase scandium, diffusivity decreases BFSN compounds.