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

Year 2023, Volume: 6 Issue: 1, 12 - 15, 30.06.2023

Sümran Bilgin , Sultan Öztürk , Kürşat İcin

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

Supporting Institution

TÜBİTAK

Project Number

119M111

Thanks

The authors gratefully acknowledge the financial support provided by the Scientific and Technological Research Council of Turkey (TUBITAK) under Grant Nos. 119M111 and 2210455, as well as the Department of Scientific Research Project of Karadeniz Technical University under Grant Nos. FDK-2018-7685, FYL-2018-7227, and FBA-2019-8162.

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