Title:
LOW-Co HYDROGEN ABSORBING ALLOY
Document Type and Number:
WIPO Patent Application WO/2007/040277
Kind Code:
A1
Abstract:
This invention provides a low-Co hydrogen absorbing alloy that possesses both excellent
low-temperature output properties (low-temperature capacitance) and service
life properties. The low-Co hydrogen absorbing alloy has a CaCu5-type crystal
structure represented by general formula MmNiaMnbAlcCodFee wherein
Mm represents an La-containing misch metal; 0.2 < d ≤ 0. 5; and 5.025
≤ a + b + c + d + e ≤ 5.200, and is characterized in that the content
of La in the hydrogen absorbing alloy is 13 to 27% by weight, and the lattice volume
of the CaCu5 type crystal structure and the full width at half maximum
on (002) plane as determined by X-ray diffraction measurement and the refinement
of lattice constant for the crystal lattice of the CaCu5 type crystal
structure are not more than 88.70 × 106 (pm3) and not
more than 0.29 (º), respectively.
Inventors:
KAGEI SHINYA (JP)
MIYANOHARA KEISUKE (JP)
HATA YOSHIMI (JP)
MIYANOHARA KEISUKE (JP)
HATA YOSHIMI (JP)
Application Number:
PCT/JP2006/320096
Publication Date:
April 12, 2007
Filing Date:
October 06, 2006
Export Citation:
Assignee:
MITSUI MINING & SMELTING CO (JP)
KAGEI SHINYA (JP)
MIYANOHARA KEISUKE (JP)
HATA YOSHIMI (JP)
KAGEI SHINYA (JP)
MIYANOHARA KEISUKE (JP)
HATA YOSHIMI (JP)
International Classes:
C22C19/00; C22F1/10; H01M4/38; C22F1/00
Domestic Patent References:
| WO2003054240A1 | 2003-07-03 |
Foreign References:
| JP2001040442A | 2001-02-13 | |||
| JP2000234133A | 2000-08-29 | |||
| JPH11297319A | 1999-10-29 | |||
| JPH09213319A | 1997-08-15 |
Attorney, Agent or Firm:
TAKEUCHI, Saburo et al. (2F. Toranomon 11 Mori Bldg., 6-4, Toranomon 2-chom, Minato-ku Tokyo 01, JP)
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