XRD Analysis of LiFeO₂ Formation from Li₂CO₃-Fe₂O₃Mechanically Activated Reagents

Abstract

The formation of LiFeO2 lithium ferrite from unmilled and milled Fe2O3-Li2CO3 mixture was studied by X-ray powder diffraction (XRD). The ball milling was perform via AGO-2S high-energy planetary ball mill at a rotational speed of 2220 rpm for 60 min. Solid-phase synthesis was carried out by conventional laboratory furnace at 600 °C. Using PowderCell 2.4 software, the structural parameters of the reagents and ferrite obtained from these were determined. According to the XRD data, the crystallite sizes of the milled reagents decreased, while the strains increased. It was found that the synthesized ferrite is characterized by multiphase composition consisting of unreacted initial reagents, α-LiFeO2, γ-LiFeO2 and α-Li0.5Fe2.5O4 phases, the concentration of which depends on the prehistory of the mixture.