US5084436A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oriented superconductor containing a dispersed non-superconducting phase
Assignee: AGC Inc
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Filing: 1990-01-29
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Granted: 1992-01-28
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Expires: 2010-01-29
Abstract
Abstract An oxide superconductor comprising a matrix of plate crystals of the formula REBa2Cu3O7-y wherein RE is at least one member selected from the group consisting of Y, La, Nd, Sm, Eu, Gd, Dy, Ho, Er, Tm, Yb, and Lu, and y is the amount of oxygen deficiency, oriented and overlaid one on another, and granular crystals of the formula RE2BACuO5 wherein RE is as defined above, insularly dispersed in the matrix in an amount of at least 0.1 mol per mol of the REBa2Cu3O7-y crystals.
Inventors
- 👤 Takeshi Morimoto
- 👤 Toshiya Matsubara
- 👤 Jun-ichiro Kase
- 👤 Jun-ichi Shimoyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:19
CPC Classifications
C; C01; C01G; C01G3/00; C01G3/006; C04; C04B; C04B35/00; C04B35/01; C04B35/45; C04B35/4504; C04B35/4508; H; H10; H10N; H10N60/00; H10N60/80; H10N60/85; H10N60/855; H10N60/857; C01P; C01P2004/00; C01P2004/20; C01P2004/60; C01P2004/61; C01P2004/62; Y; Y10; Y10S; Y10S505/00; Y10S505/775; Y10S505/785
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
138 words
An oxide superconductor comprising a matrix of plate crystals of the formula REBa 2 Cu 3 O 7-y , oriented and overlaid one on another, and granular crystals of the formula RE 2 BaCuO 5 , insularly dispersed in said matrix in an amount of from 0.1 to 3 mol per mol of the REBa 2 Cu 3 O 7-y crystals, wherein RE is at least two members selected from the group consisting of Y, La, Nd, Sm, Eu, Gd, Dy, Ho, Er, Tm, Yb, and Lu, said RE present in the second largest amount is at least 1 mol % of the total RE, y is the amount of oxygen deficiency, and the critical current density of said oxide superconductor is at least 2200 A/cm 2 at 77 K in an external magnetic field of 5 tesla.
Claim 2
Dependent Claim
138 words
An oxide superconductor comprising a matrix of plate crystals of the formula REBa 2 Cu 3 O 7-y , oriented and overlaid one on another, and granular crystals of the formula RE 2 BaCuO 5 , insularly dispersed in said matrix in an amount of from 0.1 to 3 mol per mol of the REBa 2 Cu 3 O 7-y crystals, wherein RE is at least two members selected from the group consisting of Y, La, Nd, Sm, Eu, Gd, Dy, Ho, Er, Tm, Yb, and Lu, said RE present in the second largest amount is at least 1 mol % of the total RE, y is the amount of oxygen deficiency, and the critical current density of said oxide superconductor is at least 2200 A/cm 2 at 77 K in an external magnetic field of 5 tesla.
Claim 3
Dependent Claim
25 words
The oxide superconductor of claim 1, wherein said RE present in the second largest amount is at least 10 mol % of the total RE.
Claim 4
Dependent Claim
36 words
The oxide superconductor according to claim 1, wherein the RE 2 BaCuO 5 crystals are dispersed in an amount of from 0.2 to 3 mols per mol of the REBa 2 Cu 3 O 7-y crystals.
Claim 5
Dependent Claim
30 words
The oxide superconductor according to claim 1, wherein at least 1% by volume of the RE 2 BaCuO 5 granular crystals have a particle size of at most 1 μm.
References Cited (Backward Citations)
US4975411A
Cited
US4916114A
Cited
US4824826A
Cited
US4942151A
Cited
US4973575A
Cited
US4990493A
Cited
US4956336A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-01-27 | 1995-07-29 | 1996-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-01-27 | 1999-07-29 | 2000-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-01-27 | 2003-07-29 | 2004-01-28 | $7700.00 | Window Closed / Lapsed |