| 마이크로에멀젼법을 이용한 나노 CoFe2O4 분말의 실리카 코팅 |
| 김유진, 유리, 박은영, 피재환, 최의석 |
| 요업(세라믹)기술원 산업도자실 |
| Silica Coating of Nanosized CoFe2O4 Particles by Micro-emulsion Method |
| Yoo-Jin Kim, Ri Yu, Eun-Young Park, Jae-Hwan Pee, Eui-Seok Choi |
| Advanced Industrial Ceramic Team, Korea Institute of Ceramic Engineering & Technology (KICET) |
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| ABSTRACT |
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We report the preparation of nanocrystalline cobalt ferrite, $CoFe_2O_4$ particles and their surface coating with silica layers using micro emulsion method. The cobalt ferrite nanoparticles with the size 7nm are firstly prepared by thermal decomposition method. Hydrophobic nanoparticles were coated with silica using micro-emulsion method with surfactant, $NH_4OH$, and tetraethylorthosilicate (TEOS). Monodispersed and spherical silica coated cobalt ferrite nanoparticles have average particle diameter of 38 nm and narrow sized distribution. |
| Key words:
$CoFe_2O_4$, Black pigments, Silica coating, Micro emulsion method |
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