Paper Title:
Evaluation of the Morphology and Magnetic Properties of Cr3+- Doped Ni-Zn Ferrites
  Abstract

This work involved a morphological, microstructural and magnetic characterization of nanosized powders and sintered samples of Ni-Zn ferrite doped with chromium. The effect of substituting Fe3+ for Cr3+ on the final characteristics of the powders and sintered samples was investigated. The Ni-Zn ferrite powders were prepared by combustion reaction using nitrates and urea as fuel, based on the concepts of propellant chemistry. The samples were uniaxially compacted by dry pressing (385 MPa) and sintered at 1200oC/2h, using a heating rate of 5°C/min. The Ni-Zn powders and compacted samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and the measures of their magnetic properties. The results revealed the formation of the cubic crystalline phase of the inverse spinel of Ni-Zn-Cr ferrite. The average crystallite size was 21 nm and 57 nm while the saturation magnetization was 47.0 and 73.1 emu/g for the powder and the sintered sample, respectively.

  Info
Periodical
Materials Science Forum (Volumes 591-593)
Edited by
Lucio Salgado and Francisco Ambrozio Filho
Pages
120-124
DOI
10.4028/www.scientific.net/MSF.591-593.120
Citation
V. J. da Silva, P.T.A. Santos, L. Gama, R. H. G. A. Kiminami, D. R. Cornejo, A. Azevedo, A. C. F. de Melo Costa, "Evaluation of the Morphology and Magnetic Properties of Cr3+- Doped Ni-Zn Ferrites", Materials Science Forum, Vols. 591-593, pp. 120-124, 2008
Online since
August 2008
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$32.00
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