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

The Korean Hydrogen and New Energy Society (한국수소및신에너지학회)
권호 표지

The study on the Hydrogen Characteristics of MmNi4.5Mn0.5 Hydrogen Storage Alloy

MmNi4.5Mn0.5계 수소저장합금의 수소화 특성에 관한 연구

  • Kang, Kil-Ku (Dong Myung Ltd. Co) ;
  • Kang, Sei-Sun (Materials Testing Center, Hanbat national University) ;
  • Kwon, Ho-Young (System Safety Design Engineering Daeduk College) ;
  • Lee, Rhim-Youl (Dept. of Materials Science & Engineering Dankook Universityl of Energy Engineering)
  • 강길구 (동명산업(주)) ;
  • 강세선 (한밭대학교 공동재료실험실) ;
  • 권홍영 (대덕대학 시스템안전설계과) ;
  • 이임렬 (단국대학교 신소재공학과)
  • Published : 2002.06.15

Abstract

The hydorgen storage alloys were produced by melting in arc melting furnace and then solution heat treated at $1,100^{\circ}C$ followed by pulverization. The chemical analysis on the samples showed that the major elements of misch metal(Mm) were La, Ce, Pr and Nd with impurity less than 1wt.%. X-ray diffraction indicated that the structure for these samples were a single phase of hexagonal with $CaCu_5$ type. Compared to the initial particle size $100{\sim}110{\mu}m$, the many fine cracks were found and particle size decreased to $14{\mu}m$ for $MmNi_{4.5}Mn_{0.5}$ after hydriding/dehydring test run. To activate the sample the vessel filled with hydrogen storage alloys was first evacuated for for at $70^{\circ}C$ and then treated for 10.5hr under hydrogen pressure of 20atm for $MmNi_{4.5}Mn_{0.5}$ alloy. The experimental data showed that the hydrogen storage alloy of $MmNi_{4.5}Mn_{0.5}$ had superior adsorption and description properties within a temperature rang of $40^{\circ}C{\sim}80^{\circ}C$ and also they had a good P-C-T curve.

Keywords

Hydrogen storage alloy;P-C-T curve;Misch metal;$MmN_{4.5}Mn_{0.5}$

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References

  1. G.D.Sandrock and P.O.GoodellCommon Met, Vol. 104, 1984, p. 159 https://doi.org/10.1016/0022-5088(84)90452-1
  2. 권호영, 이갑호. 강길구 : 수소저장합금의응용기슬, 원창출판사, 1998
  3. 권호영, 이갑호, 강길구 : 수소저장합금의물성개론, 원창출판사, 1998
  4. 大角泰章 : "水素吸藏合金の話", アグネ技術センタ-, 1990
  5. Y.Osumi, H.Suzuti, A.Kato and Y. Mi-yabe :Nippon Kakau Kaishi, 1971, 45
  6. 권호영, 이갑호, 강길구 : 수소저장합금의기초편, 원창출판사, 1998