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http://dx.doi.org/10.4191/KCERS.2010.47.2.113

Fabrication and Characterization of Silica Coated Fe3O4 Nanoparticles in Reverse Micro Emulsion  

Yu, Ri (Engineering Ceramic Center, Korea Institute of Ceramic Engineering & Technology (KICET))
Kim, Yoo-Jin (Engineering Ceramic Center, Korea Institute of Ceramic Engineering & Technology (KICET))
Pee, Jae-Hwan (Ceramicware Technology Center, Korea Institute of Ceramic Engineering & Technology (KICET))
Hwang, Kwang-Taek (Ceramicware Technology Center, Korea Institute of Ceramic Engineering & Technology (KICET))
Yang, Hee-Seung (Engineering Ceramic Center, Korea Institute of Ceramic Engineering & Technology (KICET))
Kim, Kyung-Ja (Engineering Ceramic Center, Korea Institute of Ceramic Engineering & Technology (KICET))
Publication Information
Journal of the Korean Ceramic Society / v.47, no.2, 2010 , pp. 113-116 More about this Journal
Abstract
The silica coated $Fe_3O_4$ nanoparticles have been synthesized using a micro-emulsion method. The $Fe_3O_4$ nanoparticles with the sizes 6 nm in diameter were synthesized by thermal decomposition method. Hydrophobic $Fe_3O_4$ nanoparticles were coated silica using surfactant and tetraethyl orthosilicated (TEOS) as a $SiO_2$ precursor. Shell thickness of silica coated $Fe_3O_4$ can be controlled (11~20 nm) through our synthetic conditions. The $Fe_3O_4$ and silica coated $Fe_3O_4$ nano powders were characterized by transmission electron microscopy (TEM), x-ray diffraction (XRD) and vortex magnetic separation (VMS).
Keywords
$Fe_3O_4$; Magnetic materials; Silica coating; Micro emulsion method; Vortex magnetic separation;
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