Patent US5041414A successfully refreshed from Google Patents.
US5041414A
Expired / Lapsed
US
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Superconductor composite
Assignee: Yeda Research and Development Co Ltd
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Filing: 1989-02-13
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Granted: 1991-08-20
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Expires: 2009-02-13
Abstract
Abstract Continuous malleable superconductive material which can be machined, rolled and soldered, being the product of sintering at an elevated temperature and pressure of a metal plated powder of a compound QBa2Cu3O7-x wherein Q is yttrium or europium, where x is smaller than one. The metal is advantageously silver and the plating process is one without the use of electricity. A preferred range of silver content is about 5 to 32 weight per cent, and the silver forms an essentially continuous phase in the superconductive material. Sintering can be done at from about 350 DEG and 950 DEG C., with a preferred range of 400 DEG to 900 DEG C. The superconductive material of the invention exhibits transition to zero-resisitivity state and the Meissner effect.
Inventors
- 👤 Shymon Reich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:15
CPC Classifications
H; H10; H10N; H10N60/00; H10N60/80; H10N60/85; H10N60/855; H10N60/857; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9265; Y10S428/93; Y10T; Y10T428/00; Y10T428/12; Y10T428/12486; Y10T428/29; Y10T428/2982; Y10T428/2991
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
59 words
A continuous malleable superconductive material comprising a sintered metal-plated ceramic powder which material is machinable, can be rolled and soldered, wherein there exists a continuous phase of said metal, and which is obtained by application of pressure sintering in an oxidizing atmosphere of said metal-plated powder of a ceramic material, which material behaves as superconductor below a critical temperature.
Claim 2
Dependent Claim
59 words
A continuous malleable superconductive material comprising a sintered metal-plated ceramic powder which material is machinable, can be rolled and soldered, wherein there exists a continuous phase of said metal, and which is obtained by application of pressure sintering in an oxidizing atmosphere of said metal-plated powder of a ceramic material, which material behaves as superconductor below a critical temperature.
Claim 3
Dependent Claim
48 words
A material according to claim 1, where said ceramic is QBa 2 Cu 3 O 7-x , where Q is selected from the group consisting of yttrium, europium, and mixtures thereof, and where said metal is silver which is applied to said ceramic is an electroless plating process.
Claim 4
Dependent Claim
43 words
A material according to claim 2, wherein particles of the ceramic powder are in the micron size range, where the silver comprises from about 5 to 32 weight-% and where the sintering is effected at an elevated temperature in an oxygen containing atmosphere.
Claim 5
Dependent Claim
40 words
A material according to claim 3, being the product of a process where the sintering is effected at a pressure in the tons/cm 2 range and where the sintering is at a temperature between about 350° C. to about 950°.
Claim 6
Dependent Claim
14 words
A material according to claim 1, in the form of a thin flexible sheet.
Claim 7
Dependent Claim
17 words
A material according to claim 5, where the flexible sheet is supported by a suitable flexible support.
Claim 8
Dependent Claim
20 words
A material according to claim 4, being the product of a process wherein the sintering temperature is 400° C.-900° C.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-08-19 | 1995-02-18 | 1995-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-08-19 | 1999-02-18 | 1999-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-08-19 | 2003-02-18 | 2003-08-20 | $7700.00 | Window Closed / Lapsed |