Abstract
This article reports on the synthesis and characterization of Zn2Z(Ba3Zn2Fe24O41) hexaferrite prepared by different methods. High-energy ball milling and sol–gel auto combustion methods were employed to prepare the powder precursors, which were subsequently sintered at different temperatures. The effects of the synthesis route on the structural and magnetic properties of the hexaferrite samples were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), and vibrating sample magnetometry (VSM). XRD results revealed the crystallization of the Z-type hexagonal phase in samples sintered at 1250°C and higher. SEM images revealed that the Z-type phase is composed of hexagonal platelet-like particles few micrometers along the plane of the particle. The samples prepared by ball milling and sintering at 1250°C and 1300°C exhibited saturation magnetizations of 50.4emu/g and 52.9emu/g, with rather low coercivity of 48Oe and 40Oe, respectively. The sample prepared by sol–gel and sintered at 1250°C, on the other hand, exhibited a similar saturation magnetization of 51emu/g, with a higher coercivity of 169Oe due to the smaller particle size. The thermomagnetic curves confirmed the multi-component nature of the samples.
Published Version
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