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PIER PIER B PIER C PIER M PIER Letters
2009-04-02
Ceramic Processing Route and Characterization of a Ni-Zn Ferrite for Application in a Pulsed-Current Monitor
By
Vera Lucia Othero de Brito,

    Dr. Vera Lucia Othero de Brito

    Divisão de Física Aplicada

    Institute for Advanced Studies --- Applied Physics Division

    Brazil

    Homepage

Antonio Carlos da Cunha Migliano,

    Dr. Antonio Carlos da Cunha Migliano

    Institute for Advanced Studies --- Applied Physics Division

    Brazil

    Homepage

L. V. Lemos,

    Dr. L. V. Lemos

    Programa de Pós-Graduação em Engenharia

    Instituto Tecnológico de Aeronáutica

    Brazil

    Homepage

F. C. L. Melo

    Dr. F. C. L. Melo

    Divisão de Materiais

    Instituto de Aeronáutica e Espaço

    Brazil

    Homepage

Progress In Electromagnetics Research, Vol. 91, 303-318, 2009
doi:10.2528/PIER09031603
Abstract
Pulsed-current sensors require transducers constituted of magnetic materials with high magnetic permeability in a frequency range compatible with the period and the frequency of the current pulse. The use of ferrites in this application has the advantage of low cost and low losses in high frequencies. The aim of this work is to present a procedure for selection of the ceramic processing route of Ni-Zn ferrite for application in a pulsed-current sensor. The ferrite samples were prepared under different processing parameters and characterized in terms of microstructure, chemical analysis, complex magnetic permeability, and magnetic hysteresis. The chosen processing route included high energy milling of the pre-sintered powder, its disaggregation before sample forming, and sintering of the samples in air for 2h at 1300οC. Tests were performed and it was verified that using this processing route for the fabrication of the sensor's core it was possible to monitor pulses of 0.1-1.0 μs.
Citation
Vera Lucia Othero de Brito, Antonio Carlos da Cunha Migliano, L. V. Lemos, and F. C. L. Melo, "Ceramic Processing Route and Characterization of a Ni-Zn Ferrite for Application in a Pulsed-Current Monitor," Progress In Electromagnetics Research, Vol. 91, 303-318, 2009.
doi:10.2528/PIER09031603
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