Synthesis and Viscoelastic Behavior of Non-Stoichiometric Spinel Ferrite Particle Suspension

Magnetorheological (MR) fluid with tunable and reversible phase transition is one of the most promising smart materials for engineering applications. In this paper, to improve the MR performance of ferrites, non-stoichiometric Zn-doped spinel ferrite (Zn 0.417 Fe 2.583 O 4 ) nanoparticles with a hig...

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Bibliographic Details
Published in:IEEE transactions on magnetics 2018-11, Vol.54 (11), p.1-4
Main Authors: Han, Jae Kyeong, Han, Wen Jiao, Gao, Chun Yan, Dong, Yu Zhen, Choi, Hyoung Jin
Format: Article
Language:English
Subjects:
Crystal structure
Crystallography
Emission analysis
Ferrites
Field emission
Image transmission
Iron
Magnetic fields
Magnetic resonance imaging
Magnetic saturation
Magnetism
Magnetization
Magnetomechanical effects
Magnetorheological (MR)
Magnetorheological fluids
Nanoparticles
non-stoichiometric
Phase transitions
Saturation magnetization
Smart materials
Spinel
spinel nanoparticle
Thermal decomposition
truncated octahedron
Viscoelasticity
X-ray diffraction
Zinc
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Summary:Magnetorheological (MR) fluid with tunable and reversible phase transition is one of the most promising smart materials for engineering applications. In this paper, to improve the MR performance of ferrites, non-stoichiometric Zn-doped spinel ferrite (Zn 0.417 Fe 2.583 O 4 ) nanoparticles with a high saturation magnetization and a truncated octahedron-like shape were synthesized using a thermal decomposition process. The crystallographic structure was analyzed using X-ray diffraction and field emission transmission electron microscope image. The Zn 0.417 Fe 2.583 O 4 had a high saturation magnetization value of 101 \text {A}\cdot \text {m}^{2} /kg at 933 kA/m, showing higher saturation magnetization than other ferrites. The MR characteristics of the Zn 0.417 Fe 2.583 O 4 particles suspended in silicone oil were studied using a rotation rheometer under various magnetic field strengths. This MR fluid exhibited typical MR characteristics, and its flow curves were fit well with the Herschel-Bulkley model.
ISSN:0018-9464
1941-0069
DOI:10.1109/TMAG.2018.2834338