| 摘要 |
PROBLEM TO BE SOLVED: To provide an Mg hydrogen-storage alloy having high reaction rate at hydrogen storage. SOLUTION: The alloy has a matrix part as a disperse medium which is composed essentially of magnesium and a dispersed body which is dispersed in the grain boundaries or grains of the matrix part and contains one or more metallic elements selected from the group consisting of Nb, Ti, Zr, Hf, Ni, Pd and Pt and/or one or more oxides selected from the group consisting of R<SB>2</SB>O<SB>3</SB>(where R means rare-earth elements), that is, high hydrogen-storage capacity inherent in the Mg-type hydrogen-storage alloy can be exhibited because hydrogen can be easily diffused by means of the dispersoid body from outside of the Mg-type hydrogen-storage alloy to the matrix pat which occludes hydrogen. Moreover, the easiness of the progress of pulverization attendant on the occlusion/discharge of hydrogen and the resultant easiness of the formation of new surfaces can reduce a hydrogen diffusion energy barrier, and the occlusion/discharge of hydrogen can be rapidly attained. COPYRIGHT: (C)2003,JPO
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