Preparation, microstructure and magnetic properties of Sm(Co,Hf)7/Co nanocomposite particles by polyol method

被引：1
|
作者：
Bu, Shao-Jing [1 ]
Duan, Xiu-Li [1 ]
Han, Xu-Hao [1 ]
Sun, Ji-Bing [1 ]
Chi, Xiang [1 ]
Cui, Chun-Xiang [1 ]
机构：
[1] Hebei Univ Technol, Key Lab New Type Funct Mat Hebei Prov, Tianjin 300130, Peoples R China
来源：
PHYSICA B-CONDENSED MATTER | 2017年 / 506卷
基金：
中国国家自然科学基金;
关键词：
Magnetic materials; Composite particles; Chemical synthesis; Microstructure; Magnetic properties; PERMANENT-MAGNETS; STRUCTURAL-PROPERTIES; PHASE-TRANSFORMATION; CRYSTAL-STRUCTURE; ALLOYS; SYSTEM; SM; PERFORMANCE; RIBBONS; SI;
D O I：
10.1016/j.physb.2016.11.010
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
Hard/soft Sm-Co/Co nanocomposite particles were prepared by reducing CoCl2 center dot 6H(2)O in the solution containing ball-milled Sm(Co, Hf) 7 particles by a simple polyol method with ethylene glycol as the solvent. Phase composition, microstructure and magnetic properties of the particles were analyzed by XRD, TEM (HRTEM) and VSM, respectively. It has been found that Sm-Co/Co core/shell structure is formed in which the Co shell is 3-5 nm in thickness and mainly exists in hcp-Co phase. At the same time, fcc-Co tends to nucleate and grow independently between Sm-Co particles. The formation mechanism of Sm-Co/Co composite particles is discussed and corresponding model is established. Sm-Co/Co composite particles perform obvious remanence enhancement effects especially after being heated at 450 degrees C for 15 min
引用
收藏
页码：138 / 144
页数：7
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