Phase optimization and microstructure of Ba-Sr-Ni-Fe-O cathode material

Abstract

The Barium Strontium Nickel Ferrite (BSNF) with composition Ba0.5Sr0.5NixFe1-xO3 where x = 0.2, 0.4, 0.6 and 0.8 were synthesized by various routes and with different precursors in order to optimize its pure phase. The various synthesis ways were followed with chloride and nitrates for auto-combustion, microwave assisted synthesis and solid state synthesis with varying various process parameters. Pure phase was obtained via solid state synthesis route with carbonate and oxide as precursors with a sequential firing schedule. The above obtained powder was pressed and sintered at 1000°C. SEM analysis was done to visualize the morphology and particle size. The XRD analysis was done to know the phases present at each synthesis while phase optimisation .The resistivity of the pellet was found in order of mega-ohm, so conductivity measurement could not be done. Apparent porosity and Bulk density measurement was also performed