US4983574A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite superconductor
Assignee: BBC Brown Boveri AG Switzerland
•
Filing: 1988-07-20
•
Granted: 1991-01-08
•
Expires: 2008-07-20
Abstract
Abstract Conductor in strip, sheet or wire form with an electrical conductivity of at least 0.85×10 6 Ω -1 cm -1 at 77° K. composed of a composite material of a metal matrix (1) and particles (2) composed of a high-temperature superconductor of the type RE Ba 2 Cu 3 O 6 .5-7.5 embedded therein and arranged rectilinearly in the longitudinal direction, RE generally denoting a rare earth metal. Preferably RE=yttrium and specifically the substance YBa 2 Cu 3 O 7 and the particle diameter=0.1-100 μm, more narrowly 0.2-20 μm. Optionally an additional metal sheath which envelops the body forming the matrix (1).
Inventors
- 👤 Gundolf Meyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 02:47
CPC Classifications
H; H10; H10N; H10N60/00; H10N60/80; H10N60/85; H10N60/855; H10N60/857; B; B22; B22F; B22F7/00; B22F7/06; B22F7/08; H10N60/20; H10N60/203; Y; Y02; Y02E; Y02E40/00; Y02E40/60; Y10; Y10S; Y10S505/00; Y10S505/70; Y10S505/704; Y10S505/725; Y10S505/739; Y10S505/74; Y10S505/80; Y10S505/801; Y10S505/805; Y10S505/807; Y10S505/812; Y10S505/813; Y10S505/815; Y10S505/823; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49014
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
126 words
A conductor with an electrical conductivity of at least 0.85×10 6 Ω -1 cm -1 at 77 K composed of a composite material which is in turn composed of a non-superconducting metallic part and a superconducting part, wherein particles (2) of a ceramic sintered high-temperature superconductor of the type RE Ba 2 Cu 3 O 6 .5-7.5, were RE = rare earth metal, are embedded in a matrix (1) composed of the non-superconducting metallic part, wherein the particles (2) of the ceramic sintered high-temperature superconductor are arranged rectilinearly in the current direction, and wherein the matrix (1) is composed of copper or silver and the high-temperature superconductor of YBa 2 Cu 3 O 6 .5-7.5 and the mean particle diameter of the latter measures 0.1-100 μm.
Claim 2
Dependent Claim
126 words
A conductor with an electrical conductivity of at least 0.85×10 6 Ω -1 cm -1 at 77 K composed of a composite material which is in turn composed of a non-superconducting metallic part and a superconducting part, wherein particles (2) of a ceramic sintered high-temperature superconductor of the type RE Ba 2 Cu 3 O 6 .5-7.5, were RE = rare earth metal, are embedded in a matrix (1) composed of the non-superconducting metallic part, wherein the particles (2) of the ceramic sintered high-temperature superconductor are arranged rectilinearly in the current direction, and wherein the matrix (1) is composed of copper or silver and the high-temperature superconductor of YBa 2 Cu 3 O 6 .5-7.5 and the mean particle diameter of the latter measures 0.1-100 μm.
Claim 3
Dependent Claim
21 words
The conductor as claimed in claim 1, wherein it additionally has a sheath (3) of a pure metal or an alloy.
Claim 4
Dependent Claim
33 words
The conductor as claimed in claim 2, wherein the sheath (3) is composed of copper and has a thickness of 5 to 20% of the diameter of the body forming the matrix (1).
Claim 5
Dependent Claim
33 words
The conductor as claimed in one of claims 1, 2 and 3 wherein it has strip, sheet or wire form and has the maximum electrical conductivity in the longitudinal direction at 77 K.
Claim 6
Dependent Claim
28 words
A conductor as claimed in claim 1, wherein the particles (2) have a flake shape defining a main surface arranged parallel to a main axis of current flow.
Claim 7
Dependent Claim
29 words
The conductor as claimed in claim 1, wherein plural of the superconducting particles (2) have a needle form and are oriented parallel to a main axis of current flow.
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) | 1994-01-07 | 1994-07-09 | 1995-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-01-07 | 1998-07-09 | 1999-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-01-07 | 2002-07-09 | 2003-01-08 | $7700.00 | Window Closed / Lapsed |