Development of High-performance Magnetic Coupling Composite-type Rare Earth Magnets

高性能磁耦合复合型稀土磁体的研制

• 批准号: 12555178
• 负责人: MACHIDA Ken-ichi
• 金额: $ 7.87万
• 依托单位: Osaka University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 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/en/grant/KAKENHI-PROJECT-12555178/
• 关键词: Permanent Magnets; Rare Earth Magnets; Bonded Magnets; Composite Magnets; Exchange Coupling; Surface Coating; Maximum Energy; Coercivity; 金属間化合物; 侵入型金属窒化物

Rare earth permanent magnets produced from intermetallic compounds with excellent magnetic property such as Sm_2Fe_<17>N_x and Nd-Fe-B HDDR materials contribute to fabricate the portable-type high-performance OA, audio players. Particularly, these materials can be molded as bonded magnets with good accuracy for the dimension control.From the above point of view, this work was made to prepare the good oxidation-resistant bonded magnets from the Sm_2Fe_<17>N_x and Nd-Fe-B HDDR powders by surface coating methods of zinc metal vapor sorption and/or Self Assemble Monolayer (SAM) coating (Zn/Nd-Fe-B and SAM/Sm_2Fe_<17>N_x). The resultant bonded magnets provide high (BH)max values of 166 and 183 kJ/m^3 for Zn/Nd-Fe-B and SAM/Sm_2Fe_<17>N_x, respectively. In addition, the high-performance magnetic coupling composite-type bonded magnets were prepared from the mixture of Nd-Fe-B HDDR and SAM/Sm_2Fe_<17>N_x powders. The (BH)max values observed were around 200 kJ/m^3 and the magnets were stable toward the oxidation by air or water.

利用Sm_2Fe_ N_x和Nd-Fe-B HDDR等金属间化合物材料制备的具有优良磁性能的稀土永磁材料<17>有助于制造便携式高性能OA、音频播放器。本研究从上述角度出发，<17>采用锌金属蒸气吸附法和/或自组装单层（SAM）法（Zn/Nd-Fe-B和SAM/Sm_2Fe_ N_x）对Sm_2Fe_ N_x和Nd-Fe-B HDDR粉末进行表面包覆<17>，制备了具有良好抗氧化性能的粘结磁体。Zn/Nd-Fe-B和SAM/Sm_2Fe_ N_x粘结磁体的最大（BH）值分别为166和183 kJ/m^3<17>。此外，还将Nd-Fe-B HDDR和SAM/Sm_2Fe_ N_x粉末混合，制备了高性能磁耦合复合型粘结磁体<17>。观察到的（BH）最大值约为200 kJ/m^3，磁体在空气或水的氧化过程中保持稳定。

项目成果

K.Noguchi: "Surface Modification for Sm_2Fe_<17>N_x Fine Powders by Self-Assembled Monolayers Derived from Hydridosilane"Chamistry Letters. 298-299 (2001)

K.Noguchi：“通过氢化硅烷衍生的自组装单分子层对 Sm_2Fe_<17>N_x 细粉进行表面改性”Chamistry Letters。

K. Noguchi, K. Machida, and G. Adachi: "High-Performance Epoxy-resin-bonded Magnets Produced from the Sm_2Fe_<17>N_x Powders Coated by Copper and Zinc Metals"Jpn. J. Appl. Phys.. 40. 2225-2231 (2001)

K. Noguchi、K. Machida 和 G. Adachi：“由铜和锌金属涂覆的 Sm_2Fe_ 17 N_x 粉末生产的高性能环氧树脂粘结磁体”Jpn。

K. Machida, S. Suzuki, and N. Ishigaki: "Resources and Recycle for Rare Earth Magnets"Rare Earths. No. 39. 27-40 (2001)

K. Machida、S. Suzuki 和 N. Ishigaki：“稀土磁体的资源和回收”稀土。

K. Machida: "Rare Earth Nano-composite Magnets"Materials Integration. 14. 18-22 (2001)

K. Machida：“稀土纳米复合磁体”材料集成。

K.Noguchi: "Preparation and Characterization of Composite-type Bonded Magnets of Sm_2Fe_<17>N_x and Nd-Fe-B HDDR Powders"Proceeding of 16th International Workshop on Rare-Earth Magnets and Their Applications. 2. 845-854 (2000)

K.Noguchi：“Sm_2Fe_<17>N_x和Nd-Fe-B HDDR粉末复合型粘结磁体的制备和表征”第16届国际稀土磁体及其应用研讨会论文集。