US4663066A
Expired / Lapsed
US
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Magnetic rare earth/iron/boron and rare earth/cobalt/boron hydrides, the process for their manufacture of the corresponding pulverulent dehydrogenated products
Assignee: Santoku America Inc
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Filing: 1985-06-19
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Granted: 1987-05-05
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Expires: 2005-06-19
Abstract
Abstract New magnetic hydride Nd2Fe14BHx (0<x<5) and family corresponding to other rare earths and yttrium. Possible substitution of Fe by Co. Preparation from Nd2Fe14B by hydrogenation (ambient temperature; pH2>20 bar), which can be reversed to give powdered Nd2Fe14B. Remarkable magnetic properties.
Inventors
- 👤 Robert Fruchart
- 👤 Roland Madar
- 👤 Alain Rouault
- 👤 Philippe L'Heritier
- 👤 Pierre Taunier
- 👤 Daniel Boursier
- 👤 Daniel Fruchart
- 👤 Patrick Chaudouet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:35
CPC Classifications
H; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/032; H01F1/04; H01F1/047; H01F1/053; H01F1/055; H01F1/057; H01F1/0571; H01F1/0573; C; C01; C01B; C01B6/00; C01B6/24; C01B6/246; C22; C22C; C22C19/00; C22C19/07; C22C38/00; Y; Y10; Y10S; Y10S420/00; Y10S420/90
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
69 words
A compound which comprises a rare earth/iron/boron or rare earth/cobalt/boron hydride and corresponds to the formula: R.sub.2 Fe.sub.14 BH.sub.x or R.sub.2 Co.sub.14 BH.sub.x where 0<x≦5, in which R represents a rare earth element or yttrium, and wherein, in the above formula, the iron or cobalt can be partially substituted by an element selected from the group consisting of 3d, 4d and 5d transition elements Al, Si, C and Ge.
Claim 2
Dependent Claim
69 words
A compound which comprises a rare earth/iron/boron or rare earth/cobalt/boron hydride and corresponds to the formula: R.sub.2 Fe.sub.14 BH.sub.x or R.sub.2 Co.sub.14 BH.sub.x where 0<x≦5, in which R represents a rare earth element or yttrium, and wherein, in the above formula, the iron or cobalt can be partially substituted by an element selected from the group consisting of 3d, 4d and 5d transition elements Al, Si, C and Ge.
Claim 3
Dependent Claim
21 words
A compound as claimed in claim 1, which corresponds to the formula: Nd.sub.2 Fe.sub.14 BH.sub.x or Nd.sub.2 Co.sub.14 BH.sub.x where 0<x≦5.
Claim 4
Dependent Claim
35 words
A process for the preparation of the compounds as claimed in claim 1, which comprises hydrogentating the rare earth/iron/boron compound R 2 Fe 14 B or the rare earth/cobalt/boron compound R 2 Co 14 B.
Claim 5
Dependent Claim
31 words
The process as claimed in claim 3, wherein said compounds are hydrogenated at ambient temperature and under a hydrogen pressure of at least 1·10 6 Pa and below 500·10 5 Pa.
Claim 6
Dependent Claim
39 words
A process for the dehydrogenation of compounds of the formula R 2 Co 14 BH x or R 2 Fe 14 BH x as claimed in claim 1, which comprises heating these compounds to between 150° and 600° C.
Claim 7
Dependent Claim
17 words
A compound as claimed in claim 1, which corresponds to Nd 2 Fe 14 BH 5 .
Claim 8
Dependent Claim
17 words
A compound as claimed in claim 1, which corresponds to Nd 2 Co 14 BH 3 .
Claim 9
Dependent Claim
15 words
A compound, as in claim 1, which is in the form of a fine powder.
References Cited (Backward Citations)
EP0101552B1
Cited
EP0126179B1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1990-05-04 | 1990-11-03 | 1991-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-05-04 | 1994-11-03 | 1995-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-05-04 | 1998-11-03 | 1999-05-05 | $7700.00 | Window Closed / Lapsed |