Abstract
Barium hexaferrite BaFe12O19 (BFO) was prepared following conventional solid-state reaction procedure (CSRP) and its’ reformed compound has been prepared following CSRP and spark plasma sintering (SPS) approaches. The Rietveld refinement of synchrotron x-ray diffraction (SXRD) study assured single-phase formation of hexaferrite (M-type with space-group P63/mmc). A dense microstructure appeared in the SPS prepared sample compared to the other compounds. The presence of multiple valances of Fe (Fe2+ along with Fe3+) was studied following modified Mohr’s salt titration (MST) besides of oxygen vacancy estimation. Mg-doped increased oxygen vacancy amount via enhancing Fe2+ in the sample. As a result, the impedance was lower in the Mg-doped BFO (BFMO) samples in contrast to undoped sample, where SPS BFMO further reduced impedance.
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