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作者:

Ma, Zhenhui (Ma, Zhenhui.) | Tian, Hui (Tian, Hui.) | Cong, Liying (Cong, Liying.) | Wu, Qiong (Wu, Qiong.) | Yue, Ming (Yue, Ming.) (学者:岳明) | Sun, Shouheng (Sun, Shouheng.)

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摘要:

We report a flame-reaction method to synthesize high-performance SmxCoy (x=1, y=5; x=2, y=17) particles on a multigram scale. This flame reaction allows the controlled decomposition of Sm(NO3)(3) and Co(NO3)(2) to 320 nm SmCo-O (SmCoO3 + Co3O4) particles. A 5.8 g sample of SmCo3.8-O particles was coated with CaO and then reduced at 900 degrees C by Ca to give 4.2 g of 260 nm SmCo5 particles. The SmCo5 particles are strongly ferromagnetic and the aligned particles in epoxy resin exhibit a large room-temperature coercivity (H-c) of 41.8 kOe and giant (BH)(max) (maximum magnetic energy product) of 19.6 MGOe, the highest value ever reported for SmCo5 made by chemical methods. This synthesis can be extended to synthesize Sm2Co17 particles, providing a general approach to scaling up the synthesis of high-performance SmxCoy nanomagnets for permanent magnet applications.

关键词:

permanent magnets rare-earth-metal magnets flame reaction

作者机构:

  • [ 1 ] [Ma, Zhenhui]Beijing Univ Technol, Minist Educ China, Coll Mat Sci & Engn, Key Lab Adv Funct Mat, Beijing 100124, Peoples R China
  • [ 2 ] [Cong, Liying]Beijing Univ Technol, Minist Educ China, Coll Mat Sci & Engn, Key Lab Adv Funct Mat, Beijing 100124, Peoples R China
  • [ 3 ] [Wu, Qiong]Beijing Univ Technol, Minist Educ China, Coll Mat Sci & Engn, Key Lab Adv Funct Mat, Beijing 100124, Peoples R China
  • [ 4 ] [Yue, Ming]Beijing Univ Technol, Minist Educ China, Coll Mat Sci & Engn, Key Lab Adv Funct Mat, Beijing 100124, Peoples R China
  • [ 5 ] [Ma, Zhenhui]Brown Univ, Dept Chem, Providence, RI 02912 USA
  • [ 6 ] [Sun, Shouheng]Brown Univ, Dept Chem, Providence, RI 02912 USA
  • [ 7 ] [Tian, Hui]Tsinghua Univ, Dept Energy & Power Engn, Ctr Combust Energy, Beijing 100084, Peoples R China

通讯作者信息:

  • 岳明

    [Yue, Ming]Beijing Univ Technol, Minist Educ China, Coll Mat Sci & Engn, Key Lab Adv Funct Mat, Beijing 100124, Peoples R China;;[Sun, Shouheng]Brown Univ, Dept Chem, Providence, RI 02912 USA

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来源 :

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION

ISSN: 1433-7851

年份: 2019

期: 41

卷: 58

页码: 14509-14512

1 6 . 6 0 0

JCR@2022

ESI学科: CHEMISTRY;

ESI高被引阀值:166

JCR分区:1

被引次数:

WoS核心集被引频次: 47

SCOPUS被引频次: 46

ESI高被引论文在榜: 0 展开所有

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