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Research PapersNo Access

MICROSTRUCTURAL AND ELECTROMAGNETIC PROPERTIES OF Mn–Zn FERRITES WITH LOW MELTING-POINT NONMAGNETIC Sb³⁺ IONS

School of Science, Beijing University of Posts and Telecommunications, Beijing 100876, P. R. China

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School of Engineering and Technology, China University of Geosciences, Beijing 100083, P. R. China

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School of Engineering and Technology, China University of Geosciences, Beijing 100083, P. R. China

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School of Engineering and Technology, China University of Geosciences, Beijing 100083, P. R. China

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School of Engineering and Technology, China University of Geosciences, Beijing 100083, P. R. China

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State Key Laboratory of New Ceramics and Fine Processing, Tsinghua University, Beijing 100084, P. R. China

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State Key Laboratory of New Ceramics and Fine Processing, Tsinghua University, Beijing 100084, P. R. China

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https://doi.org/10.1142/S0217979213500033Cited by:9 (Source: Crossref)

Abstract

The doping effects of low melting-point nonmagnetic Sb³⁺ ions on the microstructure and electromagnetic properties of Mn–Zn ferrites were studied. All the samples were prepared by traditional ceramic technique. According to the investigation on the microstructure, it was found that all the samples consisted of ferrite phases with typical spinel cubic structure, and with increasing doping content of Sb³⁺ ions, the lattice constant of the ferrites decreased but the grain size increased; the elemental analysis taken on the ferrite grain and grain boundary indicated that a portion of Sb³⁺ ions entered into the ferrite lattice. Through the measurement of magnetic properties, it was revealed that, the saturation magnetization and initial permeability of the samples rose with small doping content of Sb³⁺ ions but decreased with additional Sb³⁺ doping; the Curie temperature decreased monotonously with Sb³⁺ doping; and the coercivity rose with increasing doping content of Sb³⁺ ions. The analysis of dielectric properties indicated that the dielectric constant of the doped Mn–Zn ferrites increased with increasing doping content of Sb³⁺ ions.

Keywords:

PACS: 75.50.2y, 81.40.Tv, 81.40.Rs

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Vol. 27, No. 04

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History

Received 18 April 2012

Revised 22 October 2012

Accepted 15 November 2012

Published: 10 December 2012

Keywords