Ca-Mg-Ni containing alloys, method for preparing the same and use thereof for gas phase hydrogen storage
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United States of America Patent
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Issued Date -
May 26, 2005
app pub date -
Aug 26, 2004
filing date -
Feb 27, 2002
priority date (Note) -
Abandoned
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Abstract
Disclosed are new Ca, Mg and Ni-containing alloys of the general formula: (Ca.sub.cMg.sub.dM.sub.e).sub.b(Ni.sub.1-zT.sub.z).sub.a where: M is at least one metal selected from the group consisting of Y, Ce, La, Pr, Nd, Th, Nd, Ti, V, Zr, Ta, Hf, Sr, Ba and Misch metals; T is at least one element selected from the group consisting of Al, Zn, Cu, Fe, Co, Mn, Cr, Mo, W, Si, Ga, Ge, In, Sn, Ag, C and B; a is an integer equal to 2 or 5; z is a number ranging from 0 to 0.5; and when a is equal to 2, then 0.9.ltoreq.b.ltoreq.1.1; and when a is equal to 5, then either 1.75.ltoreq.b.ltoreq.2.25 or 0.75.ltoreq.b.ltoreq.1.31. These alloys which are of the AB.sub.2, A.sub.2B.sub.5 or AB.sub.5 types, may be single phase or multiphase and are useful for reversibly absorbing hydrogen from a gas phase. Also disclosed is a method for preparing the above alloys.
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