Preparation of M-Type Ferrite Fine Particles by Mechanical Compounding Method and Those Characteristic Evaluation.

• Project/Area Number: 10650319
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Electronic materials/Electric materials
• Research Institution: Meiji University
• Principal Investigator: YAMAMOTO Hiroshi School of Science & Technology, Professor, 理工学部, 教授 (30061972)
• Project Period (FY): 1998 – 1999
• Project Status: Completed (Fiscal Year 1999)
• Budget Amount: ¥3,500,000 (Direct Cost: ¥3,500,000); Fiscal Year 1999: ¥900,000 (Direct Cost: ¥900,000); Fiscal Year 1998: ¥2,600,000 (Direct Cost: ¥2,600,000)
• Keywords: Mechanical Compunding Method / Sr-M ferrite / Fine particles / Magnetic properties / LaィイD22ィエD2OィイD23ィエD2 and CoィイD23ィエD2OィイD24ィエD2 addition / Anisotropic sinterd magnets / メカニカルコンパウンディング法 / La_2O_3とCo_3O_4の添加 / La_2O_3添加

Research Abstract

Sr-La-Co M-type ferrite fine particles were prepared by mechanical compounding method using the planetary ball-mill and subsequent heat treatment. This experiment was carried out to investigate the magnetic properties of Sr-La Co M-Type ferrite fine particles prepared by mechanical compounding and anisotropic sintered magnets. The optimum condition of making Sr-La Co M-Type ferrite fine particles and anisotropic sintered magnets used this fine particles, and some properties of typical specimens are as follows ; chemical composition : Sr・6.3FeィイD22ィエD2 OィイD23ィエD2 ; additives : 2wt%LaィイD22ィエD2OィイD23ィエD2 and 0.3wt%CoィイD23ィエD2OィイD24ィエD2 ; planetary ball-mill condition : 300rpm × 1h ; heat treatment condition : 1100℃×1h in air ; magnetic properties are σィイD2sィエD2=86.5×10ィイD1-6ィエD1Wb・m/kg, HィイD2cJィエD2=488 kA/m,. TィイD2cィエD2=453.1℃. The value of (BH)ィイD2maxィエD2 of anisotropic sintered magnets used these Sr-La-Co M-type ferrite particles was obtained more than 32kJ/mィイD13ィエD1.

Research Products

• [Publications] 山元洋、小原学: "メカニカルコンパウディングによるSr-Mフェライト微粒子の磁気特性に及ぼすLa_2O_3添加の影響"粉体および粉末冶金誌. 第46巻. 741-745 (1999)
  • Description: 「研究成果報告書概要(和文)」より
• [Publications] 山元洋、小原学: "メカニカルコンパウディングによるSr-Mフェライト微粒子を用いた焼結磁石の磁気特性"電気学会論文誌A. Vol.119-A. 1362-1367 (1999)
  • Description: 「研究成果報告書概要(和文)」より
• [Publications] 山元洋、小原学: "メカニカルコンパウディング法によるSr-Mフェライトの磁気特性に及ぼすLa_2O_3、Co_3O_4添加の影響"粉体および粉末冶金誌. 第47巻. 160-164 (2000)
  • Description: 「研究成果報告書概要(和文)」より
• [Publications] Hiroshi Yamamoto and Gaku Obara: "Effect of LaィイD22ィエD2OィイD23ィエD2 Additive on Magnetic Properties of Sr-M Ferrite Fine Particles Prepared by Mechanical Compounding Method"J. Japan Soc. Powder and Powder Metallurgy. Vol. 46,No. 7. 741-745 (1999)
  • Description: 「研究成果報告書概要(欧文)」より
• [Publications] Hiroshi Yamamoto and Gaku Obara: "Magnetic Properties of Sr-La M-Type Sntered Magnets Used Ferrite Fine Particles Prepared by Mechanical Compounding Method"Trans. IEE of Japan. Vol. 119-A, No. 11. 1362-1367 (1999)
  • Description: 「研究成果報告書概要(欧文)」より
• [Publications] Hiroshi Yamamoto and Gaku Obara: "Effect of LaィイD22ィエD2OィイD23ィエD2 and CoィイD23ィエD2OィイD24ィエD2 Additives on Magnetic Properties of Sr-M Ferrite by Mechanical Compounding Method"J. Japan Soc. Powder and Powder Metallurgy. Vol. 47, No. 2. 160-164 (2000)
  • Description: 「研究成果報告書概要(欧文)」より
• [Publications] 山元 洋、小原 学: "メカニカルコンパウンディングによるSr-Mフェライト微粒子の磁気特性に及ぼすLa_2O_3添加の影響"粉体および粉末冶金誌. 第46巻. 741-745 (1999)
• [Publications] 山元 洋、小原 学: "メカニカルコンパウンディングによるSr-La系フェライト微粒子を用いた焼結磁石の磁気特性""電気学会論文誌A. Vol.119-A. 1362-1367 (1999)
• [Publications] 山元 洋、小原 学: "メカニカルコンパウンディング法によるSr-Mフェライトの磁気特性に及ぼすLa_2O_3,Co_3O_4添加の影響"粉体および粉末冶金誌. 第47巻. 160-164 (2000)
• [Publications] 山元洋,小原学,八木睦雄: "メカニカルコンパウンデングによるSr-Laフェライト微粒子を用いた焼結磁石の磁気特性" 電気学会研究会資料. MAG-98-176. 13-17 (1998)
• [Publications] 山元洋,小原学: "メカニカルコンパウンデイング法によるSr-Mフェラィトの磁気特性に及ぼすLa_2O_3,Co_3O_4添加の影響" 粉体粉末冶金協会平成11年度春季大会発表予定.