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J. Korean Ceram. Soc. > Volume 48(5); 2011 > Article
Journal of the Korean Ceramic Society 2011;48(5): 454.
doi: https://doi.org/10.4191/kcers.2011.48.5.454
폐 초경합금에서 추출된 Co를 이용한 CoFe2O4/SiO2 합성 및 특성평가
유리, 피재환1, 김유진
한국세라믹기술원 엔지니어링세라믹센터
1한국세라믹기술원 도자기술센터
Synthesis and Characterization of CoFe2O4/SiO2 using Cobalt Precursors from Recycling Waste Cemented Carbide
Ri Yu, Jae-Hwan Pee1, Yoo-Jin Kim
Engineering Ceramic Center, Korea Institute of Ceramic Engineering & Technology
1Ceramicware Technology Center, Korea Institute of Ceramic Engineering & Technology
We report the preparation of nanocrystalline cobalt ferrite, $CoFe_2O_4$, particles using recycled $Co_3O_4$ and their surface coating with silica using micro emulsion method. Firstly, the $Co_3O_4$ powders were separated from waste cemented carbide with acid-base chemical treatment. The cobalt ferrite nanoparticles with the size 10 nm are prepared by thermal decomposition method using recycled $Co_3O_4$. $SiO_2$ was coated onto the $CoFe_2O_4$ particles by the micro-emulsion method. The $SiO_2$-coated $CoFe_2O_4$ particles were studied their physical properties and characterized by X-ray diffraction (XRD), high resolution-transmission electron microscopy (TEM) analysis and CIE Lab value.
Key words: Waste cemented carbide, Silica, $CoFe_2O_4$, Pigment, Recycling
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