Abstract
In this study, the chemical co-precipitation method was used to prepare a nanoscale ferrite powder with Cu-Zn and Ni-Zn compositions. Ferrite, in different Cu-Zn stoichiometric ratios, showed optimal composition of saturated magnetization for Cu0.7Zn0.3Fe2O4; under an air environment and calcined at 900 °C, the saturated magnetization was 60.19 M(emu/g). The average particle diameter was 10 nm for the non-calcined sample, while when the sintering temperature was 900 °C, the particle diameter was about 150 nm. In addition, in different Ni-Zn stoichiometric ratios, the optimal composition of the saturated magnetization was Ni0.5Zn0.5Fe2O4; under an air environment and calcination at 900 °C, the saturated magnetization was 91.40 M(emu/g). The average particle diameter for the non-calcined sample was about 10 nm, but when the sintering temperature was 1200 °C, the particle diameter was 201.06 nm. The prepared ferrite nano-powder was characterized by scanning electron microscopy(SEM), X-ray diffraction(XRD), and vibrating sample magnetometer(VSM) to reveal its microscopic structure and related electromagnetic properties. Ferrite powders of either Cu-Zn or Ni-Zn composition can be used as catalysts for chemical reactions or iron core materials.
Highlights
IntroductionThe origin of ferrite dates from very early in time, and it usually existed as Fe3 O4 , as natural ferrite
The origin of ferrite dates from very early in time, and it usually existed as Fe3 O4, as natural ferrite.Ferrite is an oxide of strong magnetic properties, with wide applications due to the booming development of electronic technology
For the preparation of Ni-Cu-Zn ferrite nanoparticles using the chemical co-precipitation method and for the study of magnetic property after sintering, high purity Ni2 SO4, CuSO4, ZnSO4, and ferrous sulfate were used as precursor materials dissolved in water, with NaOH being used as the precipitation agent to form Ni0.39 Cu0.11 Zn0.5 Fe2 O4 with an obtained average particle diameter of about 30 nm
Summary
The origin of ferrite dates from very early in time, and it usually existed as Fe3 O4 , as natural ferrite. The pure material and the co-precipitation method were used to prepare Cu-Zn and Ni-Zn ferrite nano-powders and investigate their magnetic characteristics, particle diameters, and magnetic flux densities, etc. The effect of the pH value on crystallinity and integrity was investigated, and the effect of sintering temperature on saturated magnetization (Ms), residual magnetization (Mr), coercive force (Hc), magnetic flux (B), and average particle diameter (D) was studied. For the preparation of Ni-Cu-Zn ferrite nanoparticles using the chemical co-precipitation method and for the study of magnetic property after sintering, high purity Ni2 SO4 , CuSO4 , ZnSO4 , and ferrous sulfate were used as precursor materials dissolved in water, with NaOH being used as the precipitation agent to form Ni0.39 Cu0.11 Zn0.5 Fe2 O4 with an obtained average particle diameter of about 30 nm. 0 6≤ y 6≤ 0.25 by standard ceramic processing routes and studied the effect on the sintering behavior and permeability [20]
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