EFFECT OF Fe3O4 ADDITION ON STRONTIUM HARD FERRITES

Abstract

Strontium hard ferrite (SrFe₁₂O₁₉), commonly known as the ceramic permanent magnet is conventionally prepared by using Fe₂O₃ and SrCO₃ as raw materials. In this work, we were in an attempt to replace hematite (Fe₂O₃) by magnetite (Fe₃O₄) in the synthesis of strontium hard ferrites. The ratio of the magnetite (Fe₃O₄) doped was in the range of 0.5 to 3.0. X-ray diffraction (XRD) was employed to confirm the formation of the strontium hard ferrite compound. The magnetic properties such as the maximum energy product, the remanence and the coercive force were recorded using a hysteresis tracer (B-H tracer). The results shows that it is possible to replace hematite to certain extend by magnetite without destroying the magnetic properties of the samples. The density of the samples are also reported in this paper.