Influence of CaCO3 and SiO2 additives on magnetic properties of M-type Sr ferrites

Ching Chien Huang, Ai Hua Jiang, Yung Hsiung Hung, Ching Hsuan Liou, Yi Chen Wang, Chi Ping Lee, Tong Yin Hung, Chun Chung Shaw, Ming Feng Kuo, Chun Hu Cheng

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9 Citations (Scopus)

Abstract

An experiment was carried out to investigate the influence of CaCO3 and SiO2 additives on the magnetic and physical properties of M-type Sr ferrites by changing experimental parameters such as the additive composition and Ca/Si ratio. Specimens were prepared by conventional ceramic techniques. It was found that the magnetic properties (Br = 4.42 kG, iHc = 3.32 kOe and (BH)max = 4.863 MGOe) were considerably improved upon adding CaCO3 = 1.1% and SiO2 = 0.4 wt% together with Co3O4, and the mechanical properties thereof were acceptable for motor applications. It was revealed that CaCO3 and SiO2 additives led to an upswing in the magnetic properties via the enhancement of uniform grain growth, particle alignment, and the densification of Sr ferrite.

Original languageEnglish
Pages (from-to)288-294
Number of pages7
JournalJournal of Magnetism and Magnetic Materials
Volume451
DOIs
Publication statusPublished - 2018 Apr 1

Keywords

  • Additives
  • Hard magnet
  • M-type
  • Microstructure
  • Sr ferrites

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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    Huang, C. C., Jiang, A. H., Hung, Y. H., Liou, C. H., Wang, Y. C., Lee, C. P., Hung, T. Y., Shaw, C. C., Kuo, M. F., & Cheng, C. H. (2018). Influence of CaCO3 and SiO2 additives on magnetic properties of M-type Sr ferrites. Journal of Magnetism and Magnetic Materials, 451, 288-294. https://doi.org/10.1016/j.jmmm.2017.09.070