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Effect of nanocrystalline particles on the magnetic properties of Z-type hexaferrites

Authors
Journal
Journal of Magnetism and Magnetic Materials
0304-8853
Publisher
Elsevier
Publication Date
Volume
321
Issue
9
Identifiers
DOI: 10.1016/j.jmmm.2008.11.082
Keywords
  • Hexaferrite
  • Low-Temperature Sintering
  • Nanocrystalline
  • Initial Permeability
  • Q-Factor
Disciplines
  • Chemistry

Abstract

Abstract In order to improve the magnetic properties of Z-type hexaferrites such as high initial permeability and high-quality factor, the nanocrystalline hexaferrite particles (NHPs) with the same chemical composition were introduced. The influence of NHPs on the densification, microstructures and magnetic properties of the ceramics prepared by a combined method was investigated. The results show that these NHPs, which spread around the micron-sized hexaferrite particles (MHPs), enhance the densification by increasing the inter-diffusion of the particles due to the increase of contact area; simultaneously, the grain growth in the direction of c-plane is dominant. Due to the special microstructure, high sintering density, and no addition sintering aids with different chemical composition, relatively high initial permeability and Q-factor than those of the samples with 1.0 wt% Bi 2O 3 were obtained in the samples with proper nanocrystalline particles sintered at 900 °C.

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