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低酸素化によるSm-Fe-N系バルク磁石の高特性化

マグネティックス研究会資料(MAG-18-184~192 ),MAG-18-191, 41-45,

2018年12月11日(火)

松浦 昌志  西島 佑樹  手束 展規  杉本 諭 (東北大学) ( - )

Abstract

The magnetic properties of Sm-Fe-N based bulk magnets were improved using powders with low-oxygen content, and high coercivity Zn-bonded Sm-Fe-N magnets and high (BH)max Sm-Fe-N magnets were successfully obtained. The fine Zn powder with low-oxygen content was prepared by the Hydrogen-Plasma-Metal-Reaction (HPMR) method. The oxygen content was only 0.068 wt% (680 ppm), and the oxygen content of Zn-bonded Sm-Fe-N magnets preparing from HPMR-Zn powder also decreased. 15 wt% Zn-bonded Sm-Fe-N magnet showed high coercivity of 2.66 MA・m-1, and 10 wt% Zn-bonded magnet also showed high coercivity of 2.41 MA・m-1. In this study, low-oxygen content Sm-Fe-N powder was also prepared. The low-oxygen content Sm-Fe-N powder was sintered by Spark-Plasma-Sintering (SPS), and the Sm-Fe-N bulk magnet showed high maximum energy products of 179 kJ・m-3.

その他特記事項

This work was partially supported by the Future Pioneering Program“Development of magnetic material technology for high-efficiency motors” commissioned by the NewEnergy and Industrial Technology Development Organization (NEDO), the Elements Strategy InitiativeCenter for Magnetic Materials (ESICMM) under the outsourcing project of MEXT and Japan Societyfor the Promotion of Science (JSPS) KAKENHI Grant Number 16K144310.


研究活動

文部科学省

文部科学省
元素戦略プロジェクト(活動紹介)
NIMS磁石パートナーシップ

元素戦略拠点

触媒・電池元素戦略拠点
触媒・電池元素戦略研究拠点 (京都大学)
東工大元素戦略拠点
東工大元素戦略拠点 (東京工業大学)
構造材料元素戦略研究拠点
構造材料元素戦略研究拠点 (京都大学)
高効率モーター用磁性材料技術研究組合
高効率モーター用 磁性材料技術研究組合