Microstructure and Complex Magnetic Permeability of Ni0.3Zn0.7Fe2O4 Ferrite

Vera Lúcia Othéro de Brito; Francisco Cristóvão Lourenço de Melo; Antônio Carlos da Cunha Migliano

doi:10.4028/www.scientific.net/MSF.591-593.125

Paper Titles

The Effect of Niobium Content on the Curie Temperature and Microstructure of the Pr₁₄Fe_79.9-xCo₁₆B₆Nb_x Alloys
p.102

The Effect of the Processing Temperature on the Microstructures of Pr-Fe-Co-B-Nb HDDR Magnets
p.108

A Comparative Study between Low and High-Energy Milling Processes for the Production of HD PrFeCoBNb Sintered Magnets
p.114

Evaluation of the Morphology and Magnetic Properties of Cr³⁺- Doped Ni-Zn Ferrites
p.120

Microstructure and Complex Magnetic Permeability of Ni_0.3Zn_0.7Fe₂O₄ Ferrite
p.125

Effect of the High Energy Milling in the Crystallite Size of WC-Co
p.131

Effect of Milling Parameters on the TiB and TiB₂ Formation in Ti-50at%B and Ti-66at%B Powders
p.135

Structural Evaluation of Mechanically Alloyed Ti-Nb Powders
p.141

Structural Evaluation of Ti-22.2Si-11.1B Powders Milled with PCA Addition
p.147

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Microstructure and Complex Magnetic Permeability of Ni_0.3Zn_0.7Fe₂O₄ Ferrite

Abstract:

Ni-Zn ferrites are magnetic ceramics that are widely used in electric and electronic components. Among Ni1-xZnxFe2O4 ferrites, Ni0.3Zn0.7Fe2O4 is known to be the one of highest magnetic permeability in lower frequencies. This work is divided into two parts: the first part deals with the influence of sintering temperature and forming conditions on the microstructure of Ni0.3Zn0.7Fe2O4 ferrite. The second part deals with the influence of sintering temperature and environmental variations of temperature on the complex magnetic permeability of such ferrite. The ferrite studied in this work was fabricated by means of the conventional ceramic method. Complex magnetic permeability between 100 kHz – 100 MHz is discussed in relation to sintering temperature. The influence of environmental variations in temperature (-40 oC to +50 oC) on the complex magnetic permeability of the ferrite sintered at 1300 oC is discussed.