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Low-temperature sintering and high frequency properties of Cu-modified Co2Z hexaferrite

Authors
Journal
Journal of the European Ceramic Society
0955-2219
Publisher
Elsevier
Publication Date
Volume
23
Issue
5
Identifiers
DOI: 10.1016/s0955-2219(02)00157-7
Keywords
  • Ba3Co2Fe24O41
  • Ferrites
  • Magnetic Properties
  • Sintering

Abstract

Abstract The low temperature sintering behaviors and high frequency properties of Cu-modified Co 2Z hexaferrites have been investigated. Normally, Cu-modified Co 2Z hexaferrite is difficult to be sintered at temperature lower than 1150 °C. By adding a small amount of sintering aid Bi 2O 3, Cu-modified Co 2Z ceramics with high density (more than 95% theoretical density) have been prepared successfully after sintering below 900 °C. The microstructures and properties are significantly influenced by the sintering temperature, the amount of Bi 2O 3 addition, as well as Cu content. The modified hexaferrite ceramics sintered at 900 °C, exhibited excellent high frequency properties, such as high initial permeability up to 6.6, high quality factor more than 30, high resistivity over 10 9 Ω cm and good thermal stability. The experimental results show that these materials have a great potential as soft magnetic media for high frequency MLCIs applications.

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