Crystal Orientation and Magnetic Properties of Mn-Zn Ferrites Made Use of Acicular .ALPHA.-FeOOH.

• Terasawa Makoto

  Graduate School of Science and Engineering, Saitama Univ.

• Kakizaki Koichi

  Graduate School of Science and Engineering, Saitama Univ.

• Hiratsuka Nobuyuki

  Graduate School of Science and Engineering, Saitama Univ.

• Kwon Oh-Heung

  Division Electronic & Telecommunication Engineering, Kwandong Univ.

Bibliographic Information

Other Title

• シナジー磁石と磁性材料　　針状α‐ＦｅＯＯＨを用いたＭｎ‐Ｚｎフェライトの配向性および磁気特性
• シンジョウ アルファーFeOOH オ モチイタ Mn-Zn フェライト ノ ハイコウセイ オヨビ ジキ トクセイ

Abstract

Crystal oriented manganese zinc ferrites were made from acicular α-FeOOH, Mn(C₅H₇O₂)₃ and Zn(C₅H₇O₂)₂ as raw materials. The materials were mixed and calcined at 800°C for 4 hours in nitrogen atmosphere. The calcined acicular manganese zinc ferrite fine particles were formed into a thin troidal cores, consist of multi-layered. The green bodies were sintered at the range of 1100 to 1250°C for 4 to 8 hours in air, thereafter cooled in nitrogen atmosphere.<BR>The crystals of sintered manganese zinc ferrites were strongly oriented to the direction of {111} plane of the spinel, which was all formed along the upper plane of troidal cores. The behavior of crystal growth was similar to that of manganese zinc ferrite single crystal. The initial permeability of crystal oriented manganese zinc ferrites was 1380 at 0.1MHz and it was not allowed to decay up to 2.2 MHz at the operating condition of the 3dB decrease of the initial permeability. The high crystal orientation and suitable grain size has greatly contributed to the improvement of magnetic properties.

Journal

• Journal of the Japan Society of Powder and Powder Metallurgy

  Journal of the Japan Society of Powder and Powder Metallurgy 46 (6), 621-625, 1999

  Japan Society of Powder and Powder Metallurgy

Keywords

• acicular particle
• manganese zinc ferrite
• crystal oriented ferrite
• manganese zinc ferrite single crystal
• initial permeability

Details

• CRID: 1390001206309433216
• NII Article ID: 10005139599
• NII Article ID: 20000363512
• NII Book ID: AN00222724
• DOI: 10.2497/jjspm.46.621
• COI: 1:CAS:528:DyaK1MXksFart7c%3D
• ISSN: 18809014
• ISSN: 05328799
• ISSN: http://id.crossref.org/issn/05328799
• NDL BIB ID: 4770236
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I4770236
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed