| 研究課題/領域番号 |
22KF0432
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| 補助金の研究課題番号 |
22F22041 (2022)
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| 研究種目 |
特別研究員奨励費
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| 配分区分 | 基金 (2023)
補助金 (2022) |
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| 応募区分 | 外国 |
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| 審査区分 |
小区分26010:金属材料物性関連
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| 研究機関 | 国立研究開発法人産業技術総合研究所 |
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研究代表者 |
Park Kwangjae (2023) 国立研究開発法人産業技術総合研究所, 材料・化学領域, 研究員 (50980893)
平山 悠介 (2022) 国立研究開発法人産業技術総合研究所, 材料・化学領域, 主任研究員 (60617059)
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| 研究分担者 |
PARK KWANGJAE 国立研究開発法人産業技術総合研究所, 材料・化学領域, 外国人特別研究員
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| 研究期間 (年度) |
2023-03-08 – 2024-03-31
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| 研究課題ステータス |
中途終了 (2023年度)
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| 配分額 *注記 |
2,300千円 (直接経費: 2,300千円)
2023年度: 1,100千円 (直接経費: 1,100千円)
2022年度: 1,200千円 (直接経費: 1,200千円)
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| キーワード | rare earth alloy / magnetic nanoparticles / induction thermal plasma / permanent magnets / coercivity / 熱プラズマプロセス / 永久磁石 / ナノ粒子合成 / 金属ナノ粒子 / 異方性 |
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| 研究開始時の研究の概要 |
This research focuses on the development of high-performance permanent magnets using rare earth alloy nanopowders synthesized by the low oxygen-induction thermal plasma process. This research demonstrates the high-potential of rare earth alloy nanopowders.
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| 研究実績の概要 |
The purpose of this research is to prepare the core/shell nanocomposite magnetic particles for the development of high performance permanent magnets. The first attempt is to prepare the single crystal Sm-Co alloy nanoparticles with narrow composition distribution for use as the core of core/shell particles. In this study, in order to improve the magnetic properties of Sm-Co nanopowder prepared by the induction thermal plasma process, the effect of heat treatment on the phase transformation and magnetic properties of Sm-Co nanopowder was investigated. The Sm-Co nanopowder was annealed at 873, 973, 1073, and 1173 K. The X-ray diffraction results indicate that uniform Sm-Co nanopowder with a dominant SmCo5 phase can be prepared at annealing temperatures higher than 1073 K. The coercivity of the Sm-Co nanopowder annealed at 1173 K was measured to be 1.5 MA/m. The Sm-Co nanoparticles can be sufficiently oriented by an external magnetic field. Although perfect crystal orientation could not be achieved in the annealed nanopowder due to necking, short-time heat treatment promoted the formation of the hard magnetic phase and suppressed necking. The results of this study demonstrate the importance of the rapid heat treatment effect during particle formation in the induction thermal plasma process for preparing dispersible Sm-Co nanoparticles with high coercivity and improved anisotropic magnetic behavior.
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