화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.16, No.5, 666-672, September, 2010
DOI10.1016/j.jiec.2010.07.021  Export Citation
Amelioration of the hydriding and dehydriding kinetics of Mg by reactive mechanical grinding with Ni and Fe2O3 purchased and prepared by spray conversion
MyoungYoup Song†, SungHwan Baek1, HyeRyoung Park2, and Seong-Hyeon Hong3
  • Division of Advanced Materials Engineering, Research Center of Advanced Materials Development, Engineering Research Institute, Chonbuk National University, 664-14 1gaDeogjindong Deogjingu Jeonju, Jeonbuk, 561-756, Republic of Korea
  • 1Department of Hydrogen and Fuel Cells, Chonbuk National University, 664-14 1ga Deogjindong Deogjingu Jeonju, Jeonbuk, 561-756, Republic of Korea
  • 2School of Applied Chemical Engineering, Chonnam National University, 300 Yongbongdong Bukgu, Gwangju, 500-757, Republic of Korea
  • 3Powder Technology Group, KIMS, Korea Institute of Machinery & Materials, 66 Sangnamdong Changwon, Kyungnam, 641-010, Republic of Korea
E-mail:
The activated 76.5 wt%Mg-23.5 wt%Ni (Mg-Ni) has a lower hydriding rate, compared with Mg- 23.5 wt%Ni heat-treated after melt spinning, due to the nonhomogeneous distribution of Ni particles in the mixture and the larger sizes of the particles. Among 76.5 wt%Mg-23.5 wt%Ni (Mg-Ni), 71.5 wt%Mg-23.5 wt%Ni-5 wt%Fe2O3 (Mg-Ni-O), and 71.5 wt%Mg-23.5 wt%Ni-5 wt% Fe2O3(spray conversion) (Mg-Ni-Osc) samples, Mg-Ni-Osc has the highest hydriding and dehydriding rates. The reactive mechanical grinding of Mg with Ni, purchased Fe2O3 or Fe2O3(spray conversion) is considered to facilitate nucleation and shorten diffusion distances of hydrogen atoms. After hydriding.dehydriding cycling, all the samples contain Mg2Ni phase. The samples with Fe2O3 and Fe2O3(spray conversion) as starting materials contain Mg(OH)2 phase after hydriding-dehydriding cycling as well as after reactive mechanical grinding.
Keywords:H2-storage properties of Mg;Addition of Ni and Fe2O3;Reactive mechanical grinding;Mg2Ni formation;Mg(OH)2 formation
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