Abstract
BaFe2O4 spinel-type ferrite is synthesized by a simple auto-combustion method. The ferrites are based on spinel structure. The ideal spinel structure consists of the cubic close packing of oxygen anions with the tetrahedral (A site) and octahedral (B site) holes available for metal cation occupancy. Spinel ferrites have combined the both interesting magnetic properties and high electrical resistivity. The barium nitrate and ferric nitrate are taken as raw material, and combustion process is adopted for synthesis. The resultant ash was collected after combustion, and it is annealed at 700 and 900 °C. The synthesized products were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, energy-dispersive X-ray spectrum and vibrating sample magnetometer. BaFe2O4 nanoparticles exhibit good magnetic property and also possess gas sensing ability. This material is more suitable for high-temperature gas sensor to support for clean environment.
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