Structure and Phase Analysis of CoFe2O4 Alloys Produced by Solar Furnace Synthesis

This study presents the investigation results of cobalt ferrite (CoFe2O4) alloys synthesized using a high-temperature Big Solar Furnace. Samples with various stoichiometric ratios of CoO and Fe2O3 precursors were prepared and comprehensively analyzed for phase composition, crystal structure, and electron density. X-ray fluorescence and X-ray diffraction methods, along with high-resolution transmission electron microscopy and energy-dispersive X-ray spectroscopy, were employed to examine the impact of stoichiometry on morphology and phase purity. It was found that the sample with a CoO : Fe2O3 ratio of 1 : 2.13 (CoFe2O4) exhibits the highest content of the target spinel phase (58.1%) with minimal secondary phases and impurities. Modeling using FullProf and VESTA confirmed a cubic structure with space group $$F\bar {d}3m$$ . Rapid melt quenching (≈103 °C/s) enabled the preservation of high-temperature phases and nanostructured morphology. The ecological and energy-efficient nature of the solar thermal method demonstrates its potential for industrial-scale production of functional ferrites. This work emphasizes the critical role of precise stoichiometric control in achieving desired structural and magnetic properties of CoFe2O4-based materials.

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