Fabrication and Dispersion of Fe304 Nanopowder Using Co-Precipitation Method for Magnetic Fluid Preparation

A magnetic fluid comprises magnetic particles, a surfactant, and a base fluid. Magnetic particles (Fe304) are approximately 10 nm in size, and being repulsive, do not precipitate and are evenly dispersed in the base fluid by the surfactant. When a magnetic field is applied, the magnetic particles po...

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Published in2016 International Conference of Asian Union of Magnetics Societies (ICAUMS) p. 1
Main Authors Park, Jung-Kab, Baeg, Seung-Bin, Song, Yung-Il, Suh, Su-Jeong
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.08.2016
Subjects
Magnetic liquids
Magnetic particles
Magnetomechanical effects
Magnetometers
Powders
Saturation magnetization
Surfactants
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Summary:A magnetic fluid comprises magnetic particles, a surfactant, and a base fluid. Magnetic particles (Fe304) are approximately 10 nm in size, and being repulsive, do not precipitate and are evenly dispersed in the base fluid by the surfactant. When a magnetic field is applied, the magnetic particles powder is arranged along the magnetic lines of force, and again disperses uniformly when the magnetic field is removed, thus exhibiting the property of superparamagnetism. In other words, when ferromagnetic powder becomes nano-sized, it gains the property of superparamagnetism by the size effect. Therefore, magnetic fluid is applied to various fields such as speakers, dampers, and vacuum seals.
DOI:10.1109/ICAUMS.2016.8479944