VARIATION OF MAGNETIC PROPERTIES IN STRONTIUM MAGNET POWDERS WITH Sr/Fe RATIO

Authors : Sümran Bilgin, Sultan Öztürk, Kürşat Icin

Pages : 12-15

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Publication Date : 2023-06-30

Article Type : Research Article

Abstract :In this our current research, the effect of Sr/Fe on the phase formation and magnetic properties of strontium hexaferrite powders synthesized by mechanochemical synthesis and heat-treated at 950°C for 1 hour under an open atmosphere was investigated. XRD patterns revealed that the primary phase in all powders was identified as the SrFe12O19 phase. The SEM image showed that the particles had a round morphology with partial agglomeration due to the reduction in particle size. The magnetic properties were found to be affected by Sr/Fe ratio. The (BH)max values increased from 0.35 MGOe to 3.11 MGOe as the Sr/Fe increased from 1:11.0 to 1:12.0. The presence of secondary phases such as α-Fe2O3 and SrO weakened the magnetic properties. The weight fraction of the SrO phase increased with a decrease in stoichiometry from 1:12 to 1:11, which correlated with the weakening of the magnetic properties. The study concludes that the Sr/Fe ratio between Sr/Fe is a critical parameter in determining the magnetic properties of strontium hexaferrite powders.
Keywords : Mechanochemical synthesis, Strontium hexaferrite, Sr/Fe ratio, Magnetic properties