Korean Journal of Materials Research (한국재료학회지)

Materials Research Society of Korea (한국재료학회)
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The Characterization of Nano-Nickel Catalyst with High Activity by Mechanochemical (MC) Method I. Microstructure of MA Ni-50wt% Al and Preparation of Nano-Ni

기계.화학적 방법으로 제조된 고활성 나노-니켈 촉매의 특성 I. MA된 Ni-50wt% Al 합금의 미세구조 및 나노 촉매 제조

  • 이창래 (한양대학교 공과대학 재료공학과) ;
  • 최재웅 (한양대학교 공과대학 재료공학과) ;
  • 강성군 (한양대학교 공과대학 재료공학과)
  • Published : 1999.06.01
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Abstract

The new process in order to fabricate of Ni catalyst with high activity by the mechanochemical(MC) method which was combined the mechanical alloying(MA) and the chemical treatment process. The microstructure and characterization of mechanically alloyed Ni-5-wt% Al powder and Ni catalyst gained by alkali leaching were investigated byt he various analysis such as XRD, SEM-EDS, HRTEM and laser particle analyzer. The steady state powder with 1~2$\mu\textrm{m}$ mean particle size was obtained after 30hr milling with the PCA of 2 wt% stearic acid under the condition of grinding stainless steel ball to powder ratio of 60:1 and rotating speed fo 300rpm. According to result of HRTEM diffraction pattern, MA powder of the steady state was nanocrystalline $Al_3$$Ni_2$ intermetallic compound. Ni catalyst was obtained after KOH leaching of the steady state powder was about 20nm nanocrystalline which contained about 8 wt % Al.

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