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J. Korean Ceram. Soc. > Volume 47(2); 2010 > Article
Journal of the Korean Ceramic Society 2010;47(2): 113.
doi: https://doi.org/10.4191/kcers.2010.47.2.113
마이크로에멀젼법을 이용하여 실리카 코팅된 나노 Fe3O4 분말의 합성과 분석연구
유리, 김유진, 피재환1, 황광택1, 양희승, 김경자
한국세라믹기술원 엔지니어링세라믹센터
1한국세라믹기술원 도자세라믹센터
Fabrication and Characterization of Silica Coated Fe3O4 Nanoparticles in Reverse Micro Emulsion
Ri Yu, Yoo-Jin Kim, Jae-Hwan Pee1, Kwang-Taek Hwang1, Hee-Seung Yang, Kyung-Ja Kim
Engineering Ceramic Center, Korea Institute of Ceramic Engineering & Technology (KICET)
1Ceramicware Technology Center, Korea Institute of Ceramic Engineering & Technology (KICET)
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).
Key words: $Fe_3O_4$, Magnetic materials, Silica coating, Micro emulsion method, Vortex magnetic separation
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