US3884683A
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Novel superconducting material
Assignee: Hitachi Ltd
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Filing: 1972-01-24
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Granted: 1975-05-20
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Expires: 1992-01-24
Abstract
Abstract A superconducting material consisting essentially of the intermetallic compound represented by a general formula: (Nb1xTax)k Al1-yMy, wherein M is selected from the group consisting of Be, B, Si, and C, and the values of x, y, and k are 0 < OR = x < OR = 0.1, 0.01 < OR = y < OR = 0.2, and 2.3 < OR = k < OR = 4.0, respectively. This material has a higher critical temperature than that of the previously known Nv3Al.
Inventors
- 👤 Ushio Kawabe
- 👤 Shigeo Fukase
- 👤 Masato Ishibashi
- 👤 Mitsuhiro Kudo
- 👤 Kazue Takatoku
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:43
CPC Classifications
C; C22; C22C; C22C27/00; C22C27/02; H; H10; H10N; H10N60/00; H10N60/80; H10N60/85; Y; Y10; Y10S; Y10S420/00; Y10S420/901; Y10S505/00; Y10S505/80; Y10S505/801; Y10S505/805; Y10S505/806
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
19 words
A SUPERCONDUCTING MATERIAL CONSISTING ESSENTIALLY OF AN INTERMETALLIC COMPOUND HAVING A B-W TYPE CRYSTAL STRUCTURE REPRESENTED BY THE FORMULA
Claim 2
Dependent Claim
19 words
A SUPERCONDUCTING MATERIAL CONSISTING ESSENTIALLY OF AN INTERMETALLIC COMPOUND HAVING A B-W TYPE CRYSTAL STRUCTURE REPRESENTED BY THE FORMULA
Claim 3
Dependent Claim
53 words
The superconducting material of claim 1, wherein the composition of the material consists essentially of about 74 to about 84 atomic % of Nb, about 15 to about 29 atomic % of Al, and about 1 to about 15 atomic % of an element selected from the group consisting of Be, and Si.
Claim 4
Dependent Claim
56 words
The superconducting material of claim 1, wherein the composition of the material consists essentially of about 70 to about 75 atomic % of Nb, about 0 to about 4 atomic % of Ta, about 20 to about 24.75 atomic % of Al, and aout 0.25 to about 5 atomic % of the element represented by M.
Claim 5
Dependent Claim
14 words
The superconducting material of claim 1, wherein k equals 3 and x equals 0.
Claim 6
Dependent Claim
96 words
A superconducting material consisting essentially of an intermetallic compound having a Beta -W-type crystal structure represented by the formula: (Nb1-xTax)k Al1-yMy where M is an element selected From the group consisting of Be, and Si, the values of x, y, and k are O < or = x < or = 0.1, 0.01 < or = y < or = 0.2, and 2.3 < or = k < or = 4.0, respectively, and said material has been heat treated for a period of at least about 50 hours at a temperature of at least about 600*C.
Claim 7
Dependent Claim
96 words
A superconducting material consisting essentially of an intermetallic compound having a Beta -W-type crystal structure represented by the formula: (Nb1-xTax)k Al1-yMy where M is an element selected From the group consisting of Be, and Si, the values of x, y, and k are O < or = x < or = 0.1, 0.01 < or = y < or = 0.2, and 2.3 < or = k < or = 4.0, respectively, and said material has been heat treated for a period of at least about 50 hours at a temperature of at least about 600*C.
Claim 8
Dependent Claim
20 words
The superconducting material of claim 1, wherein said material has been aged so as to have a high critical temperature.
Claim 9
Dependent Claim
19 words
The superconducting material of claim 1, wherein said material has a critical temperature greater than at least about 17.0*K.
Claim 10
Dependent Claim
32 words
The superconducting material of claim 1, wherein said material exhibits a critical current density of at least greater than 8 X 103 A/cm2 for transverse magnetic fields of 30-80 KOe at 4.2*K.
Claim 11
Dependent Claim
21 words
The superconducting material of claim 1, wherein the value of y is 0.05 < or = y < or = 0.2.
Claim 12
Dependent Claim
70 words
A superconducting material consisting essentially of an intermetallic compound having Beta -W type crystal structure represented by the formula: (Nb1-xTax)kAl1-yMy, wherein M is Be in the amount of about 1.2 atomic %, and the values of x, y, and k are 0 < or = x < or = 0.1, 0.01 < or = y < or = 0.2, and 2.3 < or = k < or = 4.0, respectively.
Claim 13
Dependent Claim
70 words
A superconducting material consisting essentially of an intermetallic compound having Beta -W type crystal structure represented by the formula: (Nb1-xTax)kAl1-yMy, wherein M is Be in the amount of about 1.2 atomic %, and the values of x, y, and k are 0 < or = x < or = 0.1, 0.01 < or = y < or = 0.2, and 2.3 < or = k < or = 4.0, respectively.
Claim 14
Dependent Claim
14 words
The superconducting material of claim 1, wherein M is Si and y is 0.15.
Claim 15
Dependent Claim
22 words
A superconducting material consisting essentially of an intermetallic compound having a Beta -W type crystal structure, wherein said intermetallic compound is Nb3Al0.95Be0.05.
Claim 16
Dependent Claim
22 words
A superconducting material consisting essentially of an intermetallic compound having a Beta -W type crystal structure, wherein said intermetallic compound is Nb3Al0.95Be0.05.
Claim 17
Dependent Claim
21 words
The superconducting material of claim 5, wherein the value of y is 0.05 < or = y < or = 0.2.
Claim 18
Dependent Claim
26 words
The superconducting material of claim 3, wherein said composition includes the element represented by M in an amount of about 1 to about 5 atomic %.
References Cited (Backward Citations)
US3275480A
Cited
US3310395A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-19 | 1978-11-18 | 1979-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-19 | 1982-11-18 | 1983-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-19 | 1986-11-18 | 1987-05-20 | $7700.00 | Window Closed / Lapsed |