Special microstructure evolution and enhanced magnetic properties of Ce-Fe-B-based spark plasma sintered magnets with core-shell structure by NdCu addition

2019 ◽  
Vol 775 ◽  
pp. 449-456 ◽  
Author(s):  
Qingzheng Jiang ◽  
Weikai Lei ◽  
Lunke He ◽  
Qingwen Zeng ◽  
Sajjad Ur Rehman ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Microstructure Evolution ◽  
Shell Structure ◽  
Core Shell ◽  
Sintered Magnets ◽  
Spark Plasma ◽  
Core Shell Structure

Microstructure and magnetic properties of Fe–6.5 wt.% Si/MnZn(Fe2O4)2 composites with core-shell structure prepared by spark plasma sintering

2017 ◽  
Vol 31 (16-19) ◽  
pp. 1744013 ◽  
Author(s):  
Liang Yan ◽  
Biao Yan
Keyword(s):  
Magnetic Properties ◽  
Shell Structure ◽  
Core Shell ◽  
Soft Magnetic ◽  
Magnetic Composites ◽  
Plasma Sintering ◽  
Soft Magnetic Composites ◽  
Spark Plasma ◽  
Core Shell Structure ◽  
Microstructure And Magnetic Properties

Fe–6.5 wt.% Si powder coated with 10 wt.% MnZn(Fe2O4)2 (MnZn ferrite) was successfully prepared by using dry-type stirring ball milling. The Fe–6.5 wt.% Si/MnZn(Fe2O4)2 soft magnetic composites were prepared by subsequent spark plasma sintering. This paper aims at analyzing the microstructure and magnetic properties of Fe–6.5 wt.% Si/MnZn(Fe2O4)2 soft magnetic composites (sintering temperature: 750[Formula: see text]C, sintering pressure: 50 MPa, holding time: 8 min, heating rate: 60 K/min). Based on X-ray diffraction and scanning electron microscopy, microstructure and powder morphology were examined and magnetic measurements on bulk samples were conducted by vibrating sample magnetometer and impedance analyzer. According to the experiments results, Fe–6.5 wt.% Si/MnZn(Fe2O4)2 composites displayed a core-shell structure, and ceramic phase was observed after sintering. The Fe–6.5 wt.% Si/MnZn(Fe2O4)2 composites achieved high resistivity ([Formula: see text] m[Formula: see text]/cm) while maintaining excellent magnetic properties ([Formula: see text] emu/g). Core losses especially at medium and high frequencies were significantly reduced.

Microstructure and magnetic properties of SiO2/FeCoNiSi0.25 high-entropy alloy with a core/shell structure

2021 ◽  
Vol 290 ◽  
pp. 129399
Author(s):  
Shaofeng Yang ◽  
Jianan Wen ◽  
Fangyang Zhang ◽  
Jingyi Xie ◽  
Jiao Mo ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Shell Structure ◽  
High Entropy Alloy ◽  
Core Shell ◽  
High Entropy ◽  
Core Shell Structure ◽  
Microstructure And Magnetic Properties

Preparation and magnetic properties of SrFe12O19/SiO2 nanocomposites with core–shell structure

2007 ◽  
Vol 61 (11-12) ◽  
pp. 2187-2190 ◽  
Author(s):  
Wuyou Fu ◽  
Haibin Yang ◽  
Qingjiang Yu ◽  
Jing Xu ◽  
Xiaofen Pang ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Shell Structure ◽  
Core Shell ◽  
Sio2 Nanocomposites ◽  
Core Shell Structure

scholarly journals High Photocatalytic Activity of Fe3O4-SiO2-TiO2Functional Particles with Core-Shell Structure

2013 ◽  
Vol 2013 ◽  
pp. 1-8 ◽  
Author(s):  
Chenyang Xue ◽  
Qiang Zhang ◽  
Junyang Li ◽  
Xiujian Chou ◽  
Wendong Zhang ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Photocatalytic Activity ◽  
Shell Structure ◽  
Sol Gel ◽  
High Photocatalytic Activity ◽  
Core Shell ◽  
Large Area ◽  
Uniform Size ◽  
Functional Nanoparticles ◽  
Core Shell Structure

This paper describes a novel method of synthesizing Fe3O4-SiO2-TiO2functional nanoparticles with the core-shell structure. The Fe3O4cores which were mainly superparamagnetic were synthesized through a novel carbon reduction method. The Fe3O4cores were then modified with SiO2and finally encapsulated with TiO2by the sol-gel method. The results of characterizations showed that the encapsulated 700 nm Fe3O4-SiO2-TiO2particles have a relatively uniform size distribution, an anatase TiO2shell, and suitable magnetic properties for allowing collection in a magnetic field. These magnetic properties, large area, relative high saturation intensity, and low retentive magnetism make the particles have high dispersibility in suspension and yet enable them to be recovered well using magnetic fields. The functionality of these particles was tested by measuring the photocatalytic activity of the decolouring of methyl orange (MO) and methylene blue (MB) under ultraviolet light and sunlight. The results showed that the introduction of the Fe3O4-SiO2-TiO2functional nanoparticles significantly increased the decoloration rate so that an MO solution at a concentration of 10 mg/L could be decoloured completely within 180 minutes. The particles were recovered after utilization, washing, and drying and the primary recovery ratio was 87.5%.

Fabrication of high strength and plasticity of Zn-Mg composites with core–shell structure by spark plasma sintering

2020 ◽  
Vol 279 ◽  
pp. 128525
Author(s):  
Zeqin Cui ◽  
Mengda Luo ◽  
Yakai Zhang ◽  
Dianqing Gong ◽  
Wenxian Wang ◽  
...  
Keyword(s):  
Spark Plasma Sintering ◽  
Shell Structure ◽  
High Strength ◽  
Core Shell ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Core Shell Structure ◽  
Strength And Plasticity
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