Synthesis of Polycrystalline (Ba,Co)-Z Ferrite by Spark Plasma Sintering Method

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  • Yanagiuchi Nobuki
    Department of Electrical Engineering and Computer Sciences, Graduate School of Engineering, Himeji Institute of Technology
  • Nakamura Tatsuya
    Department of Electrical Engineering and Computer Sciences, Graduate School of Engineering, Himeji Institute of Technology
  • Takeuchi Tomonari
    National Institute of Advanced Industrial Science and Technology
  • Kageyama Hiroyuki
    National Institute of Advanced Industrial Science and Technology
  • Yamada Yoshihiro
    Department of Electrical Engineering and Computer Sciences, Graduate School of Engineering, Himeji Institute of Technology

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  • 放電プラズマ焼結法を用いたＺ型フェライトの作製
  • ホウデン プラズマ ショウケツホウ オ モチイタ Zガタ フェライト ノ サクセイ

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Polycrystalline Ba3Co2Fe24O41 specimens were fabricated by usual solid state sintering or spark plasma sintering method. SEM observation showed that densification occurred simultaneously with grain growth in the solid state sintering. The spark plasma sintering produced dense ceramics with fine grain structure. Their complex permeability spectra were evaluated with a help of numerical calculation based on our previous model, which is related to the microstructure. Both spin rotation and domain wall motion affected the permeability in the solid state sintered specimens. The permeability of the spark plasma sintered specimens was mainly attributed to spin rotation.

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