磁性材料の化学　　針状性フェライトの合成と特性に関する研究

• 平塚 信之

  埼玉大学工学部機能材料工学科

書誌事項

タイトル別名

• Studies on Preparation of Acicular Ferrites and Their Properties.
• シンジョウセイ フェライト ノ ゴウセイ ト トクセイ ニカンスルケンキュウ

抄録

Acicular barium ferrite, cobalt ferrite and crystal oriented manganese zinc ferrite particles were prepared using the acicular α-FeOOH as the starting material. The crystal structure and magnetic characteristics of these fine particles were investigated in detail. Acicular barium ferrite fine particles doped with Co²⁺ ions and Ti⁴⁺ ions were fabricated by a conventional sintering method. The BaCo_xTixFe_12-2xO₁₉ particles consisted of some grains and their c-axis were aligned along the short axis of the acicular particles. The output waveform of the acicular barium ferrite magnetic tape signified that it had perpendicular magnetic anisotropy. Acicular cobalt ferrite fine particles were prepared from acicular α-FeOOH and C₁₀H₁₄O₄Co⋅2H₂O. The particles had coercivity of 1 kOe (80kA/m) and magnetization values of 67 emu/g (0.45Wb/m²). The output of the magnetic tape made of the acicular particles, with long axis of 0.4μm was greatlly enhanced in the high density recording. The acicular Mn-Zn ferrite fine particles composed of 65.6mol. %Fe, 21.9mol. %Mn and 12.5mol. %Zn were made by conventional sintering method. The fine particle was made up of several crystallites with long axis of 0.2-1.0μm. These fine particles were pressed in an applied magnetic field and then sintered at 1250°C for 4hrs in air. The oriented Mn-Zn ferrite exhibited strong crystal orientation similar to the single crystal of it.

収録刊行物

• 粉体および粉末冶金

  粉体および粉末冶金 45 (1), 43-52, 1998

  一般社団法人 粉体粉末冶金協会

キーワード

• acicular particle
• barium ferrite
• cobalt ferrite
• Mn-Zn ferrite
• magnetic recording tape
• perpendicular magnetic recording

詳細情報

• CRID: 1390282681285877248
• NII論文ID: 20000363511
• NII論文ID: 10002014901
• NII書誌ID: AN00222724
• DOI: 10.2497/jjspm.45.43
• COI: 1:CAS:528:DyaK1cXhtFOhsb4%3D
• ISSN: 18809014
• ISSN: 05328799
• ISSN: http://id.crossref.org/issn/05328799
• NDL書誌ID: 4392663
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I4392663
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可