Transactions of the Korean hydrogen and new energy society (한국수소및신에너지학회논문집)

The Korean Hydrogen and New Energy Society (한국수소및신에너지학회)
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A Study on the Synthesis of Co-ferrite by High-energy Ball Milling and Thermal Reduction Characteristics

고 에너지 볼 밀링을 통한 Co-ferrite 제조 및 열적 환원에 대한 연구

  • Cho, M.S. (Department of Find Chemical Engineering and Chemistry, Chungnam National University) ;
  • Kim, W.J. (Hydrogen Energy Research Group, Korea Institute of Energy Research) ;
  • Kim, C.H. (Hydrogen Energy Research Group, Korea Institute of Energy Research) ;
  • Kang, K.S. (Hydrogen Energy Research Group, Korea Institute of Energy Research) ;
  • Kim, Y.H. (Department of Find Chemical Engineering and Chemistry, Chungnam National University) ;
  • Park, C.S. (Hydrogen Energy Research Group, Korea Institute of Energy Research)
  • 조미선 (충남대학교 대학원) ;
  • 김우진 (한국에너지기술연구원 열화학수소 연구단) ;
  • 김창희 (한국에너지기술연구원 열화학수소 연구단) ;
  • 강경수 (한국에너지기술연구원 열화학수소 연구단) ;
  • 김영호 (충남대학교 대학원) ;
  • 박주식 (한국에너지기술연구원 열화학수소 연구단)
  • Published : 2006.09.15
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Abstract

Co-ferrite was synthesized by HEBM (High Energy Ball Milling) with a stoichiometric (Co/Fe=0.5/2.5) mixture of CoO and $Fe_2O_3$ powders. The effect of milling time on the phase transformation of the mixture was investigated by XRD. Mono-phase solid solution of Co-ferrite, which was milled for 4 h and then calcined at $900^{\circ}C$ in the Ar atmosphere, was confirmed by XRD analysis. The composition and thermal reduction behavior of Co-ferrite were analyzed by TGA and XRF. As a result, oxygen deficient Co-ferrite was synthesized by HEBM and the weight decrease of the Co-ferrite, which was oxidized at $600^{\circ}C$ for 10h by $H_2O$ vapor, was 2.41 wt% during thermal reduction at $1300^{\circ}C$.

Keywords

References

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