Disproportionation resistant metal hydride alloys for use at high temperatures in catalytic converters
US5673556A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 6, 1995 |
| Grant date | Oct 7, 1997 |
| Priority date | — |
| Expiry date | Jan 6, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S420/90
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Metal hydrides for absorbing hydrogen which are capable of undergoing repeated charge/discharge cycles of absorbing and desorbing hydrogen at high temperatures and cycles through a high temperature followed by a low temperature. These alloys are intended for use in devices such as heat pumps, heat exchangers, energy storage devices, thermal actuators, temperature sensors and electrochemical cells. The alloys generally comprise the chemical formula EQU A.sub.1-x B.sub.x where PA1 A is selected from the group of elements consisting of Ti, Hf, Y, PA1 B is selected from the group of elements consisting of Nb, Ni, Co, and Fe, PA1 and x is in a range from 0.05 to approximately 0.80, and specific alloys comprise hafnium-nickel (HfNi), hafnium cobalt (HfCo), hafnium-iron (Hf.sub.2 Fe), yttrium-nickel (YNi) and titanium-niobium Ti.sub.1-x Nb.sub.x, where x is in a range of from 0.05<.times.<0.60. Optionally, additives such as Al, B, Co, Cr, Cu, Hf, Mn, Mo, Ni, Fe, Ga, Ge, Si, Sn, Ta, V and Zr may be added in proportions up to about 10 atomic percent relative to the base alloy set forth above to provide for specific customized applications. Also, methods of use for such high temperature disp…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.