Characterization of the electrical and magnetic properties of NixZn1-xFe2O4 ferrite

Reference Presenter Authors
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Abstract
08-061 Manoel Ribeiro da Silva Oliveira, v.D.(Universidade Federal de Itajubá); da Silva, M.R.(Universidade Federal de Itajuba); Mendonça, C.S.(Universidade Federal de Itajubá); Rubinger, R.M.(Universidade Federal de Itajubá); Oliveira, A.F.(Universidade Federal de Itajubá); Ribeiro, V.A.(Centro Universitário de Itajubá); Quental Araujo, I.J.(Universidade Federal de Itajuba); High-performance ceramic materials are gaining more and more space in the industry. In this context, the ferrites have been highlighting, due to their low cost, their ease of production and mainly their magnetic and electrical characteristics. Ni-Zn ferrite (NixZn1-xFe2O4) is a material that has high magnetic permeability, high electrical resistance and low loss by parasitic currents which is favorable for high-frequency applications such as switching sources and cores of transformers and reactors. The present work aims to sinter Ni-Zn ferrites and characterize the magnetic and electric properties of the same. Magnesium-zinc ferrite samples of Ni-Zn stoichiometry (NixZn1-xFe2O4), (with x = 0.0, 0.25, 0.5, 0.75, 1.00) were sintered for 20 hours at 1250 ° C by the conventional ceramic method, by means of solid-state reaction with the oxides of zinc, nickel, and iron. Magnetic properties are characterized by means of a vibrating sample magnetometer. The magnetic parameters are measured by the hysteresis curve (Magnetization M versus Field H) and the ferrites present saturation magnetization values in the order of 50 emu / g. The highest density was obtained for the ZnFe2O4 ferrite. We acknowledge the financial support of FAPEMIG.
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