US4010047A
Expired / Lapsed
US
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Method for stabilizing a superconductor
Assignee: Siemens AG
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Filing: 1975-04-30
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Granted: 1977-03-01
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Expires: 1995-04-30
Abstract
Abstract A method for stabilizing a superconductor of the type having at least one core which is entirely or partly of an intermetallic superconductive compound and which is provided with a sheath of an alloy which contains an electrically normal-conducting metal and an element of the compound, in which the element of the compound contained in the sheath is removed from the sheath, at least partially, by a chemical transport reaction to obtain electrical stabilization of the superconductor.
Inventors
- 👤 Sigrun Frohmader
- 👤 Gunther Ziegler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:33
CPC Classifications
H; H10; H10N; H10N60/00; H10N60/01; H10N60/0184; Y; Y10; Y10S; Y10S505/00; Y10S505/80; Y10S505/815
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
129 words
A method for stabilizing a superconductor having at least one core which consists at least partially of an intermetallic superconductive compound of the type A 3 B consisting of at least two elements and which is provided with a sheath of an alloy containing an electrically highly normal conducting metal and one element of the compound comprising: a. disposing the superconductor and a gaseous transport agent within a vessel containing no other active gases; b. heating said vessel to the point where a chemical transport reaction takes place in which the element of the compound in the sheath reacts with the transport agent to form a gaseous reaction product, and where at another point within the vessel a reverse reaction takes place despositing the element of another surface therein.
Claim 2
Independent Claim
129 words
A method for stabilizing a superconductor having at least one core which consists at least partially of an intermetallic superconductive compound of the type A 3 B consisting of at least two elements and which is provided with a sheath of an alloy containing an electrically highly normal conducting metal and one element of the compound comprising: a. disposing the superconductor and a gaseous transport agent within a vessel containing no other active gases; b. heating said vessel to the point where a chemical transport reaction takes place in which the element of the compound in the sheath reacts with the transport agent to form a gaseous reaction product, and where at another point within the vessel a reverse reaction takes place despositing the element of another surface therein.
Claim 3
Dependent Claim
34 words
The method according to claim 1 and further including the step of placing a getter consisting of the electrically highly normal conducting metal in the vicinity of the superconductor during the chemical transport reaction.
Claim 4
Dependent Claim
22 words
The method according to claim 2 and further including the step of establishing a temperature gradient between the superconductor and the getter.
Claim 5
Dependent Claim
18 words
The method according to claim 3, wherein the superconductor is kept at a higher temperature than the getter.
Claim 6
Dependent Claim
16 words
The method according to claim 2, wherein a tubular getter is placed concentrically about said superconductor.
Claim 7
Dependent Claim
22 words
The method according to claim 5 and further including the step of establishing a temperature gradient between the superconductor and the getter.
Claim 8
Dependent Claim
18 words
The method according to claim 6, wherein the superconductor is kept at a higher temperature than the getter.
Claim 9
Dependent Claim
56 words
The method according to the claim 7 wherein said superconductor core consists at least partially of Nb 3 Sn and said sheath of a copper-tin alloy and wherein said chemical transport reaction is carried out by subjecting the conductor to an annealing treatment in a hydrogen chloride gas atmosphere in the presence of a copper getter.
Claim 10
Dependent Claim
45 words
The method according to claim 8, wherein the superconductor and the getter are maintained at a temperature in the range of 700° to 800° C with the temperature of the getter maintained approximately between 10° and 40° C lower than the temperature of the conductor.
Claim 11
Dependent Claim
56 words
The method according to the claim 1 wherein said superconductor core consists at least partially of Nb 3 Sn and said sheath of a copper-tin alloy and wherein said chemical transport reaction is carried out by subjecting the conductor to an annealing treatment in a hydrogen chloride gas atmosphere in the presence of a copper getter.
Claim 12
Dependent Claim
45 words
The method according to claim 8, wherein the superconductor and the getter are maintained at a temperature in the range of 700° to 800° C with the temperature of the getter maintained approximately between 10° and 40° C lower than the temperature of the conductor.
Claim 13
Independent Claim
155 words
A method for stabilizing a superconductor having at least one core which consists at least partially of an intermetallic superconductive compound selected from the group consisting of Nb 3 Sn and V 3 Ga which is provided with a sheath of an alloy containing copper and one element of the compound comprising: a. disposing said superconductor and a gaseous transport agent selected from the group consisting of hydrogen chloride, chlorine, iodine and hydrogen iodide in a nonreactive atmosphere; b. disposing a getter of copper in the vicinity of said superconductor; c. heating said superconductor to a temperature approximately between 700° and 800° C; and d. maintaining the temperature of said getter about 10° to 40° C lower than the temperature of said superconductor, whereby a chemical transport reaction will take place with the transport agent reacting with the element in said sheath and transporting and depositing the element through a reverse reaction on said getter.
Claim 14
Independent Claim
155 words
A method for stabilizing a superconductor having at least one core which consists at least partially of an intermetallic superconductive compound selected from the group consisting of Nb 3 Sn and V 3 Ga which is provided with a sheath of an alloy containing copper and one element of the compound comprising: a. disposing said superconductor and a gaseous transport agent selected from the group consisting of hydrogen chloride, chlorine, iodine and hydrogen iodide in a nonreactive atmosphere; b. disposing a getter of copper in the vicinity of said superconductor; c. heating said superconductor to a temperature approximately between 700° and 800° C; and d. maintaining the temperature of said getter about 10° to 40° C lower than the temperature of said superconductor, whereby a chemical transport reaction will take place with the transport agent reacting with the element in said sheath and transporting and depositing the element through a reverse reaction on said getter.
Claim 15
Independent Claim
192 words
A method for stabilizing a superconductor having at least one core which consists at least partially of an intermetallic superconductive compound of the type A 3 B consisting of at least two elements and which is provided with a sheath of an alloy containing an electrically highly normal conducting metal selected from the group consisting of copper, silver, aluminum and gold and one element of the compound comprising: a. disposing the superconductor and a gaseous transport agent selected from the group consisting of halogens and hydrogen halides within a vessel containing no other active gases; b. disposing a getter of a metal selected from the group consisting of copper, silver, aluminum and gold in the vicinity of said superconductor; c. heating said superconductor to a temperature at which a chemical transport reaction takes place in which the element of the compound in the sheath reacts with the transport agent to form a gaseous reaction product; and d. maintaining the temperature of said getter about 10°-40° C lower than the temperature of said superconductor whereby said chemical transport reaction will cause said element to be deposited on said getter through a reverse reaction.
Claim 16
Independent Claim
192 words
A method for stabilizing a superconductor having at least one core which consists at least partially of an intermetallic superconductive compound of the type A 3 B consisting of at least two elements and which is provided with a sheath of an alloy containing an electrically highly normal conducting metal selected from the group consisting of copper, silver, aluminum and gold and one element of the compound comprising: a. disposing the superconductor and a gaseous transport agent selected from the group consisting of halogens and hydrogen halides within a vessel containing no other active gases; b. disposing a getter of a metal selected from the group consisting of copper, silver, aluminum and gold in the vicinity of said superconductor; c. heating said superconductor to a temperature at which a chemical transport reaction takes place in which the element of the compound in the sheath reacts with the transport agent to form a gaseous reaction product; and d. maintaining the temperature of said getter about 10°-40° C lower than the temperature of said superconductor whereby said chemical transport reaction will cause said element to be deposited on said getter through a reverse reaction.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-02-29 | 1980-08-30 | 1981-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-02-29 | 1984-08-30 | 1985-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-02-29 | 1988-08-30 | 1989-03-01 | $7700.00 | Window Closed / Lapsed |