Cold-accumulating material and cold-accumulating refrigerator using the same
US6334909B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 17, 1999 |
| Grant date | Jan 1, 2002 |
| Priority date | — |
| Expiry date | Jun 17, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F1/0009
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A cold accumulating material comprising magnetic substance expressed by the general formula:RCu1−xM1+x  (1)wherein R denotes at least one of rare earth element selected from the group consisting of Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Er, Ho, Tm and Yb, M denotes at least one element selected from the group consisting of Ag, Au, Al, Ga, In, Ge, Sn, Sb, Si, Bi, Ni, Pd, Pt, Zn, Co, Rh, Ir, Mn, Fe, Ru, Cr, Mo, W, V, Nb, Ta, Ti, Zr and Hf, and wherein Ni and Ge are not simultaneously selected, and x in atomic ratio satisfies a relation: −0.95≧x≧0.90. According to the above structure, there can be provided a cold accumulating material and a refrigerator using the cold accumulating material capable of exhibiting a remarkable and stable refrigerating performance at an extremely low temperature for a long time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.