Abstract
The effect of sintering temperatures (Ts ) on the structural and magnetic properties of Ni0.6Zn0.4Fe2O4(NZFO) ferrites synthesized by conventional double sintering method has been reported. The samples are sintered at 1200, 1250 and 1300 °C. The X-ray diffraction (XRD) analysis reveals the formation of a single phase cubic spinel structure of the sample. The magnetic parameters such as saturation magnetization, Ms ; coercive field, Hc ; remanent magnetization, Mr and Bohr magneton, µ B are determined and compared with reported values. The obtained values are found to be 71.94 emu/gm and 1.2 Oe for Ms and Hc , respectively at Ts = 1300°C sample. Curie temperature (Tc ) for various Ts has also been calculated. It is noteworthy that the sample with a very low Hc could be used in transformer core and inductor applications.
Highlights
Nickel–Zinc ferrites have attracted huge attention in recent years owing to their potential applications in power transformers in electronics, antenna rods, loading coils, microwave devices and telecommunication, and are promising candidates for microwave device applications due to their remarkable magnetic properties, high resistivity and low eddy current loss [1,2,3,4,5]
We have studied the effect of Ts on the structural and magnetic properties of NZFO prepared by conventional double sintering route
Single phase cubic spinel structure with Fd3m space group symmetry of NZFO has been confirmed at different Ts by the X-ray diffraction (XRD) study [20].The average grain sizes are determined from the SEM micrograph by linear intercept technique and ranging between 1.4 - 7.8 m, which are almost homogeneously distributed throughout the sample surface [20]
Summary
Nickel–Zinc ferrites have attracted huge attention in recent years owing to their potential applications in power transformers in electronics, antenna rods, loading coils, microwave devices and telecommunication, and are promising candidates for microwave device applications due to their remarkable magnetic properties, high resistivity and low eddy current loss [1,2,3,4,5]. The properties of the ferrites sensitively depend on the method of preparation, dimension of raw materials (nano or bulk), composition, sintering conditions [6, 7]. It is expected that dimension of the raw materials (nano powder) could be changed the magnetic as well as electrical properties of the Ni-Zn ferrites. Most cases, the Ni-Zn ferrites have been prepared from bulk powders or claimed synthesized nanocrystalline powders where the crystallite size are calculated using Scherrer equation by analyzing X-ray diffraction (XRD) peaks. It is great importance to study the effect of sintering temperature (Ts) on the properties of Ni-Zn ferrite synthesized by nano powders as raw materials. We have studied the effect of Ts on the structural and magnetic properties of NZFO prepared by conventional double sintering route
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