磁性材料　　Ｓｒ系Ｗ型フェライトの磁気特性　第三報

• 大村 正志

  明治大学理工部

• 田中 章博

  明治大学理工部

• 山元 洋

  明治大学理工部

書誌事項

タイトル別名

• Magnetic Properties of Sr System W-Type Ferrites. The Third Report.
• Srケイ Wガタ フェライト ノ ジキ トクセイ 3

抄録

An experiment was carried out to investigate the effects of stearic acid as a new reducing agent on the magnetic and physical properties of SrFe₂-W type hexagonal ferrite. It was found that the magnetic properties of SrO⋅8.5Fe₂O₃ were considerably improved by simultaneous addition of 0.3 wt% stearic acid, 0.3 wt%SiO₂, and 0.7 wt% CaO. The optimum conditions for making magnets and some typical properties of the obtained sample are as follows. Chemical analysis composition: Sr²⁺_0.96Si⁴⁺_0.11Ca²⁺_0.17C⁴⁺_0.21Fe²⁺_0.72Fe³⁺_16.61O₂₇; semi-sintering condition: 1350°C×4.0h in nitrogen gas atmosphere; drying treatment condition: 200°C×3.0h in air; sintering condition: 1170°C×1.5h in nitrogen gas atmosphere. Magnetic and physical properties are J_m=0.48 (T), J_r=0.45 (T), H_cJ=169.0 (kA/m), H_cB=164.7 (kA/m), (BH)_max=34.6 (kJ/m³), T_c=501.5 (°C), HA=1446 (kA/m), KA=3.3 (×10⁵ J/m³), and η_B=29.8μ_B, a=5.888 (×10^-10m), c=32.85 (×10^-10m), and c/a=5.58.

収録刊行物

• 粉体および粉末冶金

  粉体および粉末冶金 49 (8), 732-737, 2002

  一般社団法人 粉体粉末冶金協会

キーワード

• steric acid
• reducing agent
• SiO<SUB>2</SUB> and CaO additives
• SrFe<SUB>2</SUB>-W type hexagonal ferrite
• magnetic properties

詳細情報

• CRID: 1390282681285863424
• NII論文ID: 10009579868
• NII書誌ID: AN00222724
• DOI: 10.2497/jjspm.49.732
• ISSN: 18809014
• ISSN: 05328799
• ISSN: http://id.crossref.org/issn/05328799
• NDL書誌ID: 6273568
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I6273568
• 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