Hollow Structured Magnetic Particles of CoFe2O4 and Their Magnetorheological Characteristics

K. Zhang; S. H. Piao; H. J. Choi

doi:10.1109/TMAG.2015.2444913

Hollow Structured Magnetic Particles of CoFe₂O₄ and Their Magnetorheological Characteristics

K. Zhang^*
, S. H. Piao
, H. J. Choi

^*Corresponding author for this work

School of Chemistry and Chemical Engineering, Harbin Institute of Technology
Inha University

Research output: Contribution to journal › Article › peer-review

11 Scopus citations

Abstract

The hollow structured magnetic CoFe₂O₄ nanoparticles were synthesized by a facile hydrothermal method, and their magnetorheological (MR) characteristics were investigated in this paper. From transmission electron microscopy and density measurements, it was found that the CoFe₂O₄ nanoparticles possess a spherical shape with a narrow size distribution with a low density of 4.46 g/cm³. The MR fluid was then prepared by dispersing CoFe₂O₄ nanoparticles in mineral oil. Under applied magnetic fields, its rheological properties, such as shear stress, shear viscosity, storage modulus, and yield stress, were investigated via a rotational rheometer with a parallel-plate geometry. In addition, suspension stability of the CoFe₂O₄-based MR fluid was also examined by a Turbiscan apparatus, demonstrating that the CoFe₂O₄ suspension has good dispersion stability due to the unique hollow architecture and the relatively low density.

Original language	English
Article number	7130641
Journal	IEEE Transactions on Magnetics
Volume	51
Issue number	11
DOIs	https://doi.org/10.1109/TMAG.2015.2444913
State	Published - 1 Nov 2015
Externally published	Yes

Keywords

CoFeO
magnetization
magnetorheological (MR) fluid
yield stress

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10.1109/TMAG.2015.2444913

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title = "Hollow Structured Magnetic Particles of CoFe2O4 and Their Magnetorheological Characteristics",

abstract = "The hollow structured magnetic CoFe2O4 nanoparticles were synthesized by a facile hydrothermal method, and their magnetorheological (MR) characteristics were investigated in this paper. From transmission electron microscopy and density measurements, it was found that the CoFe2O4 nanoparticles possess a spherical shape with a narrow size distribution with a low density of 4.46 g/cm3. The MR fluid was then prepared by dispersing CoFe2O4 nanoparticles in mineral oil. Under applied magnetic fields, its rheological properties, such as shear stress, shear viscosity, storage modulus, and yield stress, were investigated via a rotational rheometer with a parallel-plate geometry. In addition, suspension stability of the CoFe2O4-based MR fluid was also examined by a Turbiscan apparatus, demonstrating that the CoFe2O4 suspension has good dispersion stability due to the unique hollow architecture and the relatively low density.",

keywords = "CoFeO, magnetization, magnetorheological (MR) fluid, yield stress",

author = "K. Zhang and Piao, \{S. H.\} and Choi, \{H. J.\}",

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year = "2015",

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doi = "10.1109/TMAG.2015.2444913",

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AU - Zhang, K.

AU - Piao, S. H.

AU - Choi, H. J.

PY - 2015/11/1

Y1 - 2015/11/1

N2 - The hollow structured magnetic CoFe2O4 nanoparticles were synthesized by a facile hydrothermal method, and their magnetorheological (MR) characteristics were investigated in this paper. From transmission electron microscopy and density measurements, it was found that the CoFe2O4 nanoparticles possess a spherical shape with a narrow size distribution with a low density of 4.46 g/cm3. The MR fluid was then prepared by dispersing CoFe2O4 nanoparticles in mineral oil. Under applied magnetic fields, its rheological properties, such as shear stress, shear viscosity, storage modulus, and yield stress, were investigated via a rotational rheometer with a parallel-plate geometry. In addition, suspension stability of the CoFe2O4-based MR fluid was also examined by a Turbiscan apparatus, demonstrating that the CoFe2O4 suspension has good dispersion stability due to the unique hollow architecture and the relatively low density.

AB - The hollow structured magnetic CoFe2O4 nanoparticles were synthesized by a facile hydrothermal method, and their magnetorheological (MR) characteristics were investigated in this paper. From transmission electron microscopy and density measurements, it was found that the CoFe2O4 nanoparticles possess a spherical shape with a narrow size distribution with a low density of 4.46 g/cm3. The MR fluid was then prepared by dispersing CoFe2O4 nanoparticles in mineral oil. Under applied magnetic fields, its rheological properties, such as shear stress, shear viscosity, storage modulus, and yield stress, were investigated via a rotational rheometer with a parallel-plate geometry. In addition, suspension stability of the CoFe2O4-based MR fluid was also examined by a Turbiscan apparatus, demonstrating that the CoFe2O4 suspension has good dispersion stability due to the unique hollow architecture and the relatively low density.

KW - CoFeO

KW - magnetization

KW - magnetorheological (MR) fluid

KW - yield stress

UR - https://www.scopus.com/pages/publications/84946237717

U2 - 10.1109/TMAG.2015.2444913

DO - 10.1109/TMAG.2015.2444913

M3 - 文章

AN - SCOPUS:84946237717

SN - 0018-9464

VL - 51

JO - IEEE Transactions on Magnetics

JF - IEEE Transactions on Magnetics

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M1 - 7130641

ER -

Hollow Structured Magnetic Particles of CoFe₂O₄ and Their Magnetorheological Characteristics

Abstract

Keywords

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