| 摘要 |
PURPOSE:To obtain the titled alloy absorbing a large amount of hydrogen, easy to activate in the early stage of a hydrogenation reaction, and having a high reaction rate by substituting misch metal having a reduced Ce content for part of Ca in a Ca-Ni alloy so as to provide a specified composition. CONSTITUTION:This hydrogen storing alloy is represented by a formula Ca1-x (CFMm)xNi5 (where CFMm is misch metal having <=10wt% Ce content and 0<x<1, preferably 0.1<=x<=0.9). The alloy is a superior hydrogen storing alloy absorbing a large amount of hydrogen, easy to activate in the early stage of a hydrogenation reaction, and having a high reaction rate. The hysteresis between the absorption and dissociation of hydrogen is small, and the equilibrium hydrogen pressure at ordinary temp. is within the range in which the alloy is easily handled. Said CFMm is manufactured by removing Ce from ordinary misch metal having about 15% Ce content in the form of oxide and by carrying out electrolysis.
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