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Author:

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

Indexed by:

EI Scopus SCIE PubMed

Abstract:

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.

Keyword:

permanent magnets rare-earth-metal magnets flame reaction

Author Community:

  • [ 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

Reprint Author's Address:

  • 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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Source :

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION

ISSN: 1433-7851

Year: 2019

Issue: 41

Volume: 58

Page: 14509-14512

1 6 . 6 0 0

JCR@2022

ESI Discipline: CHEMISTRY;

ESI HC Threshold:166

JCR Journal Grade:1

Cited Count:

WoS CC Cited Count: 48

SCOPUS Cited Count: 46

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 8

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