γ-Mg_<17>Al_<12>相の水素吸蔵特性 Hydrogen absorption properties of the γ-Mg_<17>Al_<12> phase

この論文にアクセスする

この論文をさがす

著者

    • NOBUKI Tohru
    • School of High Technology for Human Welfare, Tokai University
    • KATO Shunsuke
    • Department of Energy Science and Engineering, School of Engineering, Tokai University
    • KUJI Toshiro
    • Course in Materials Science and Chemistry Unified Graduate School, Tokai University

抄録

In the present work, the Mg-Al system was studied towards hydrogen absorption properties.<br>Several Mg<sub>x</sub>Al<sub>100-x</sub> compounds from X=47.5 to 70 by incremental step of 2.5 were prepared by ball-milling with post-annealing. Different experimental measurements were performed and are in mutual agreement with properties of existing phases. They show that deviation from the ideal composition of Mg<sub>17</sub>Al<sub>12</sub> (X=58.62) leads to a decrease of the homogeneity. The single γ-phase range is extended at room temperature for initial 55≤X≤62.5 atomic % of Mg.<br>The hydrogenation properties have been investigated for two compounds at the nominal composition X=50 and X=58.6. The hydrogen absorption is presented at 350°C and shows a maximum hydrogen capacity of 3.5 and 3.7 wt% respectively. For these two compounds, the pressure-composition isotherm (PCT) curves show two absorption plateaux, with equilibriums around 10 bars which are higher than that of pure MgH<sub>2</sub>. The shape discontinuity corresponds to a transformation into a 2-step process as described in this work. After final desorption, the initial compounds are recovered, indicates that the reactions are reversible.

In the present work, the Mg-Al system was studied towards hydrogen absorption properties.<br>Several Mg<sub>x</sub>Al<sub>100-x</sub> compounds from X=47.5 to 70 by incremental step of 2.5 were prepared by ball-milling with post-annealing. Different experimental measurements were performed and are in mutual agreement with properties of existing phases. They show that deviation from the ideal composition of Mg<sub>17</sub>Al<sub>12</sub> (X=58.62) leads to a decrease of the homogeneity. The single γ-phase range is extended at room temperature for initial 55≤X≤62.5 atomic % of Mg.<br>The hydrogenation properties have been investigated for two compounds at the nominal composition X=50 and X=58.6. The hydrogen absorption is presented at 350°C and shows a maximum hydrogen capacity of 3.5 and 3.7 wt% respectively. For these two compounds, the pressure-composition isotherm (PCT) curves show two absorption plateaux, with equilibriums around 10 bars which are higher than that of pure MgH<sub>2</sub>. The shape discontinuity corresponds to a transformation into a 2-step process as described in this work. After final desorption, the initial compounds are recovered, indicates that the reactions are reversible.

収録刊行物

  • Journal of advanced science

    Journal of advanced science 19(3), 88-96, 2008-02-29

    Society of Advanced Science

参考文献:  21件中 1-21件 を表示

  • <no title>

    MURRAY J. L.

    Bull. alloy phase diagr 3, 60, 1982

    被引用文献1件

  • <no title>

    SAMSON S.

    Acta Cryst B B24, 1004, 1968

    被引用文献1件

  • <no title>

    SURYANARAYANA C.

    Prog Mater Sci 46, 1184, 2001

    被引用文献1件

  • <no title>

    AIZAWA T.

    Mechano-metallurgical processing for direct fabrication of solid non-equilibrium phase materials 42, 261-279, 1993

    被引用文献1件

  • <no title>

    YABE H.

    J. Metastable Nanocryst. Mater. 24-25, 173-176, 2005

    被引用文献1件

  • <no title>

    RODRIGUEZ-CARVAJAL J.

    Proceedings of the XVth congress of international union of crystallography, satellite meeting on powder diffraction, (Toulouse, France, 1990), 1990

    被引用文献1件

  • <no title>

    SAMSON S.

    Acta Cryst. 19, 401, 1965

    被引用文献1件

  • <no title>

    FEUERBACHER M.

    Z. Kristallogr. 222, 259-288, 2007

    被引用文献1件

  • <no title>

    CALKA A.

    J. Mater. Sci. 28, 158, 1993

    被引用文献1件

  • <no title>

    ZHANG D. L.

    Metall. Mater. Trans., A 25A, 739, 1994

    被引用文献1件

  • <no title>

    STAMPFER J. F. Jr.

    J. Am. Chem. Soc. 82, 3504, 1960

    被引用文献1件

  • <no title>

    VAJO J. J.

    J Phys. Chem. B B108, 13977, 2004

    被引用文献1件

  • <no title>

    BOGDANOVIC B.

    Int. J. Hydrogen Energy 18, 575, 1993

    被引用文献2件

  • <no title>

    YABE H.

    J. Alloy. Compd. 433, 241-245, 2007

    被引用文献6件

  • <no title>

    CRIVELLO J.-C.

    J. Alloy. Compd. 446-447, 157-161, 2007

    被引用文献6件

  • <no title>

    CRIVELLO J.-C.

    Internallics 15, 1432-1437, 2007

    被引用文献2件

  • <no title>

    SINGH D.

    Intermetallics 11, 373, 2003

    被引用文献1件

  • <no title>

    SCHOENITZ M.

    J. Mater. Res. 18, 1827-1836, 2003

    被引用文献2件

  • <no title>

    BOUARICHA S.

    J. Alloys Comp. 297, 282, 2000

    被引用文献2件

  • <no title>

    MINTZ M. H.

    J. Less-Common Met. 74, 263-270, 1980

    被引用文献4件

  • <no title>

    ZALUSKA A.

    Appl. Phys. A A72, 157, 2001

    被引用文献2件

各種コード

  • NII論文ID(NAID)
    10021874996
  • NII書誌ID(NCID)
    AA11948435
  • 本文言語コード
    ENG
  • 資料種別
    ART
  • ISSN
    09155651
  • データ提供元
    CJP書誌  J-STAGE 
ページトップへ