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

机械复合法制备M型铁氧体细粒及其特性评价

• 批准号: 12650324
• 负责人: YAMAMOTO Hiroshi
• 金额: $ 2.37万
• 依托单位: Meiji University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-12650324/
• 关键词: mechanical compounding Method; Sr(Ba-)La-Co system M-type ferrite fine particles; anisotropic and isotropic sintered magnets; spark plasma sintering method; hot-pressing method; magnetic properties; メカニカルコンパウンデイング法; Sr(Ba)-La-Co系フェライト; 放電プラズマ焼結

This study was carried out to investigate the magnetic properties of the bulk magnets manufactured using Sr(Ba)-La-Co M-type ferrite fine particles prepared by mechanical compounding method. In the manufacture of bulk magnets, anisotropic magnets were made by general sintering process, and isotropic magnets were made by spark plasma sintering and hotpressing process. As the result, it was obtained the high-performance anisotropic magnets {over (BH)max=32 kJ/m^3}with high coercivity in Sr-La-Co M-type ferrite. In the isotropic magnets, the high-performance magnets{over (BH)max=18 kJ/m^3} was obtained. However the anisotropic magnets were made in spite of without anisotropic treatment in the manufacture. As the results of examining these causes by various methods, it was found that the shape of these fine particles was flat, and the particle size distribution was uniform. Therefore, it seem to attach the mechanical orientation to the magnet.

采用机械复合法制备了Sr（Ba）-La-Co M型铁氧体微粒，并对其磁性能进行了研究。在块体磁体的制造中，各向异性磁体采用常规烧结工艺，各向同性磁体采用放电等离子烧结和热压工艺。结果表明，在Sr-La-Co M型铁氧体中获得了高矫顽力的高性能各向异性磁体{（BH）max=32 kJ/m^3}。在各向同性磁体中，获得了高性能磁体{over（BH）max=18 kJ/m^3}。然而，尽管在制造中没有进行各向异性处理，但仍制造了各向异性磁体。作为通过各种方法检查这些原因的结果，发现这些微粒的形状是平坦的，并且粒度分布是均匀的。因此，它似乎将机械方向附加到磁体上。

项目成果

G. Obara, H. Yamamoto, M. Tani and M. Tokita: ""Magnetic Properties of Spark Plasma Sintering Magnets Using Fine Powders by Mechanical Compounding Method""Journal of Magnetism and Magnetic Material. (To be published).

G. Obara、H. Yamamoto、M. Tani 和 M. Tokita：“通过机械复合方法使用细粉进行火花等离子烧结磁体的磁性能”，《磁性与磁性材料杂志》。

G.Obara, H.Yamamoto: "Magnetic Properties of Sr-La-Co M-type Ferrite Fine Particles by Mechanical Compounding Method and Anisotropic Sintered Magnets Using These Fine Particles"-Ferrite-Proc. of The 8th International Conference on Ferrite. 425-427 (2001)

G.Obara、H.Yamamoto：“通过机械复合方法制备 Sr-La-Co M 型铁氧体细颗粒的磁性能以及使用这些细颗粒的各向异性烧结磁体”-Ferrite-Proc。

G. Obara and H. Yamamoto: ""Magnetic Properties of Sr-La-Co M-type Ferrite Fine Particles by Mechanical Compounding Method and Anisotropic Sintered Magnets Using These Fine Particles""-Ferrite- Proc. of The 8th International Conference on Ferrite. 425-427

G. Obara 和 H. Yamamoto：“通过机械复合方法获得 Sr-La-Co M 型铁氧体细颗粒的磁性以及使用这些细颗粒的各向异性烧结磁体”-Ferrite- Proc。

小原 学, 山元 洋: "メカニカルコンパウンディング法によるSr-La-Co系粉末を用いた異方性焼結磁石の磁気特性"粉体および粉末冶金誌. 第47巻,7号. 796-800 (2000)

Manabu Ohara、Hiroshi Yamamoto：“通过机械复合方法使用 Sr-La-Co 粉末的各向异性烧结磁体的磁性能”《粉末与粉末冶金杂志》第 47 卷，第 796-800 期（2000 年）。

G.Obara, H.Yamamoto, M.Tani, M.Tokita: "Magnetic Properties of Spark Plasma Sintering Magnets Using Fine Powders by Mechanical Compounding Method"Journal of Magnetism and Magnetic Material.

G.Obara、H.Yamamoto、M.Tani、M.Tokita：“通过机械复合方法使用细粉进行火花等离子烧结磁体的磁性能”磁性与磁性材料杂志。