| 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) |
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| ABSTRACT |
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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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