Evolution of microstructure and formation mechanism of Nd-Fe-B nanoparticles prepared by low energy consumption chemical method

被引：18
作者：
Guo, Yaozu [1 ]
Zhao, Dong [2 ]
You, Junhua [1 ]
Pei, Wenli [2 ]
Qu, Yingdong [1 ]
Wang, Xiaoyang [2 ]
Meng, Qingyu [1 ]
机构：
[1] Shenyang Univ Technol, Sch Mat Sci & Engn, Shenyang 110870, Liaoning, Peoples R China
[2] Northeastern Univ, Minist Educ, Key Lab Anisotropy & Texture Mat, Shenyang 110819, Liaoning, Peoples R China
来源：
RSC ADVANCES | 2018年 / 8卷 / 68期
基金：
中国国家自然科学基金;
关键词：
MAGNETIC NANOPARTICLES; PERMANENT-MAGNET; TRIMETHYLAMINE-BORANE; THERMAL-DECOMPOSITION; SILVER NANOPARTICLES; MOTOR DRIVE; ND2FE14B; ALLOY; SIZE;
D O I：
10.1039/c8ra08271e
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Nd2Fe14B nanoparticles were successfully prepared by using a low-energy chemical method. The microscopic characteristics and formation mechanisms of the phases were investigated at each stage during the preparation of Nd-Fe-B nanoparticles. The Nd-Fe-B intermediates, Nd-Fe-B oxides and reduced Nd-Fe-B nanoparticles were detected and analyzed by using TEM, STEM, XRD, SEM, VSM and Rietveld calculations. The results showed that the intermediate of Nd-Fe-B consisted of Fe3O4 and Nd and Fe elements surrounded by nitrile organic compounds. The Nd-Fe-B oxide was composed of NdFeO3 (48.619wt%), NdBO3 (31.480 wt%) and -Fe (19.901 wt%), which was formed by the reaction among Nd, Fe3O4 and B2O3. NdFeO3 and NdBO3 exhibited a perovskite-like lamellar structure, and the grain size was smaller than that of -Fe. Nd-Fe-B particles were mainly composed of Nd2Fe14B and -Fe phases. The small particles of NdFeO3 and NdBO3 and the interstitial position between oxide particles and -Fe were more favorable for the formation of Nd2Fe14B particles. At the same time, the surface of -Fe particles can also diffuse to form Nd2Fe14B nanoparticles. The coercivity of Nd-Fe-B particles was 5.79 kOe and the saturation magnetization was 63.135 emu g(-1).
引用
收藏
页码：38850 / 38859
页数：10
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