Hydrogen absorbing alloy and process for preparing same
US5496424A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 5, 1993 |
| Grant date | Mar 5, 1996 |
| Priority date | — |
| Expiry date | Oct 5, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S420/90
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A hydrogen absorbing alloy represented by the general formula R.sub.1-x A.sub.x (Ni.sub.5-y B.sub.y).sub.z wherein R is Mm (misch metal) or La, A is at least one element selected from the group consisting of Ce, Nd, Pr, Sm and Y, B is at least one element selected from the group consisting of Al, Sn, V, Cr, Mn, Fe, Co and Cu, 0.ltoreq.x.ltoreq.0.5, 0<y.ltoreq.1.0 and 0.8.ltoreq.z.ltoreq.1.2. The alloy is prepared by subjecting an alloy material of the above composition to a heat treatment so that when the plateau region of the resulting hydrogen absorbing alloy is expressed by a normal cumulative distribution function wherein the hydrogen content of the alloy is taken as frequency and the logarithm of the equilibrium hydrogen pressure of the alloy as a random variable, the alloy is at least 0.04 to up to 0.10 in standard deviation .sigma..
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.