首页|Synthesis of size-controlled and dispersible Sm2Fe17N3 magnetic particles by reduction diffusion process using molten salt

Synthesis of size-controlled and dispersible Sm2Fe17N3 magnetic particles by reduction diffusion process using molten salt

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The synthesis of size-controlled Sm2Fe17 magnetic particles is a prerequisite for the fabrication of high-performance Sm2Fe17N3 permanent magnetic materials.Here,Sm2Fe17 was synthesized using a cost-effective reduction-diffusion method.The calcium chloride molten salt was introduced to control the particle size and achieve a single phase of Sm2Fe17.The effects of reduction-diffusion reaction temper-ature and the amount of added calcium chloride on the phase constitution and microstructure of the final product of reduction-diffusion were systematically investigated.Adding an appropriate amount of calcium chloride can effectively inhibit the overgrowth and sintering of the reduced particles.By employing the strategy of adding 20 wt％of calcium chlorides into the green compacts,we were able to successfully synthesize uniform Sm2Fe17 particles that are well-dispersed,with an average size of 2.2 μm.Furthermore,by combining the optimal reduction-diffusion conditions and the nitriding process,the hard magnetic Sm2Fe17N3 material was successfully obtained.This study could be useful for the devel-opment of high-performance Sm2Fe17N3 magnetic materials utilizing reduction-diffusion technology.

Sm2Fe17N3Reduction-diffusionRare earthsPermanent magnetsMolten salt

Junhua Xi、Zhi Yang、Muhammad Haseeb、Yuanyuan Chen、Xiaofeng Nie、Liying Cong、Qiong Wu、Enfeng Fu、Hongguo Zhang、Weiqiang Liu、Ming Yue

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Faculty of Materials and Manufacturing,Key Laboratory of Advanced Functional Materials,Ministry of Education of China,Beijing University of Technology,Beijing,100124,China

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaProgram of Top Disciplines Construction in Beijing

5220119952271161PXM2019_014204_500031

2024

10.1016/j.jre.2023.10.022

稀土学报(英文版)
中国稀土学会

稀土学报(英文版)

CSTPCDEI
影响因子：1.3
ISSN：1002-0721
年,卷(期)：2024.42(11)