US5079225A
Expired / Lapsed
US
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Process and apparatus for preparing textured crystalline materials using anisotropy in the paramagnetic susceptibility
Assignee: First National Bank of Omaha
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Filing: 1990-03-12
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Granted: 1992-01-07
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Expires: 2010-03-12
Abstract
Abstract The present invention discloses a process and apparatus for forming textures in materials. The process comprises heating a material having an anisotropy in the paramagnetic or diamagnetic susceptibility within a magnetic field. The material is heated to a temperature approaching its melting point while a magnetic field of at least 10 4 Oe is simultaneously applied. The process and apparatus produce highly textured bulk and elongated materials with high current densities below critical superconducting temperatures.
Inventors
- 👤 Aleksey Holloway
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:08
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/622; C04B35/653; C04B35/01; C04B35/45; Y; Y10; Y10S; Y10S505/00; Y10S505/725; Y10S505/727; Y10S505/729; Y10S505/742
Claims Analysis
Total Claims: 38
Claim 1
Independent Claim
60 words
A process for producing textured materials comprising the steps of: providing an un-textured material, other than thin films having a sodium thallium (NaTl) type crystal structure, having anisotropy in at least one of paramagnetic and diamagnetic susceptibility; heating said material sufficiently to initiate substantial grain growth; subjecting said heated material to a magnetic field of at least 10 4 Oe.
Claim 2
Dependent Claim
60 words
A process for producing textured materials comprising the steps of: providing an un-textured material, other than thin films having a sodium thallium (NaTl) type crystal structure, having anisotropy in at least one of paramagnetic and diamagnetic susceptibility; heating said material sufficiently to initiate substantial grain growth; subjecting said heated material to a magnetic field of at least 10 4 Oe.
Claim 3
Dependent Claim
17 words
The process as claimed in claim 1, wherein said untextured ceramic is a perovskite type structured material.
Claim 4
Dependent Claim
15 words
The process as claimed in claim 2, wherein said untextured ceramic has a 1:2:3 structure.
Claim 5
Dependent Claim
32 words
The process as claimed in claim 2, wherein said un-textured ceramic is RE-Ba 2 Cu 3 O x , wherein RE is a rare earth, and x is between 6 and 7.
Claim 6
Dependent Claim
19 words
The process as claimed in claim 4, wherein said un-textured material is YBa 2 Cu 3 O 7- δ.
Claim 7
Dependent Claim
19 words
The process as claimed in claim 4, wherein said un-textured ceramic is HoBa 2 Cu 3 O 7- δ.
Claim 8
Dependent Claim
34 words
The process as claimed in claim 1, wherein said un-textured ceramic is Tl(Bi)Ba 2 Ca n-1 Cu n O 2n+3 and n is an integer selected from the set 1, 2, 3, and 4.
Claim 9
Dependent Claim
22 words
The process as claimed in claim 1, wherein said un-textured ceramic material is heated to within 100° K. of its melting point.
Claim 10
Dependent Claim
35 words
The process as claimed in claim 1, wherein the temperature of said un-textured ceramic material is cycled above and below its melting point for 1 second or greater intervals whereby the diffusion speed is increased.
Claim 11
Dependent Claim
22 words
The process as claimed in claim 8, wherein said temperature is cycled above the material's melting point for at least 1 second.
Claim 12
Dependent Claim
23 words
The process as claimed in claim 9, wherein said material is heated to a temperature exceeding its melting point at least 1 time.
Claim 13
Dependent Claim
34 words
The process as claimed in claim 10, wherein said material is allowed to cool to within 100° K. above or below the material's melting point after each heating cycle above the material's melting point.
Claim 14
Dependent Claim
29 words
The process as claimed in claim 1, wherein said material is maintained at a temperature within 100° K. above or below its melting point for at least 1 minute.
Claim 15
Dependent Claim
24 words
The process as claimed in claim 1, wherein said un-textured ceramic material is exposed to a magnetic field of at least 10 4 Oe.
Claim 16
Dependent Claim
21 words
The process as claimed in claim 14, wherein the material is exposed to said magnetic field for at least 1 minute.
Claim 17
Dependent Claim
61 words
A process for producing textured materials comprising the steps of: providing a partially textured material, other than thin films having a sodium thallium (NaTl) type crystal structure, having anisotropy in at least one of paramagnetic and diamagnetic susceptibility; heating said material sufficiently to initiate substantial grain growth; subjecting said heated material to a magnetic field of at least 10 4 Oe.
Claim 18
Dependent Claim
61 words
A process for producing textured materials comprising the steps of: providing a partially textured material, other than thin films having a sodium thallium (NaTl) type crystal structure, having anisotropy in at least one of paramagnetic and diamagnetic susceptibility; heating said material sufficiently to initiate substantial grain growth; subjecting said heated material to a magnetic field of at least 10 4 Oe.
Claim 19
Dependent Claim
15 words
The process as claimed in claim 16, wherein said partially textured ceramic is a perovskite.
Claim 20
Dependent Claim
16 words
The process as claimed in claim 17, wherein said partially textured ceramic has a 1:2:3 structure.
Claim 21
Dependent Claim
33 words
The process as claimed in claim 17, wherein said partially textured ceramic is RE-Ba 2 Cu 3 O x , wherein RE is a rare earth, and X is between 6 and 7.
Claim 22
Dependent Claim
20 words
The process as claimed in claim 19, wherein said partially textured material is YBa 2 Cu 3 O 7- δ.
Claim 23
Dependent Claim
20 words
The process as claimed in claim 19, wherein said partially textured ceramic is HoBa 2 Cu 3 O 7- δ.
Claim 24
Dependent Claim
35 words
The process as claimed in claim 1, wherein said partially textured ceramic is Tl(Bi)Ba 2 Ca n-1 Cu n O 2n+3 and n is an integer selected from the set 1, 2, 3, and 4.
Claim 25
Dependent Claim
23 words
The process as claimed in claim 16, wherein said partially textured ceramic material is heated to within 100° K. of its melting point.
Claim 26
Dependent Claim
33 words
The process as claimed in claim 23, wherein the temperature of said partially textured ceramic material is cycled above and below its melting point for short periods whereby the diffusion speed is increased.
Claim 27
Dependent Claim
22 words
The process as claimed in claim 24, wherein said temperature is cycled above the material's melting point for at least 1 second.
Claim 28
Dependent Claim
24 words
The process as claimed in claim 25, wherein said material is heated to a temperature exceeding its melting point between 1 and 1000 times.
Claim 29
Dependent Claim
34 words
The process as claimed in claim 26, wherein said material is allowed to cool to within 100° K. above or below the material's melting point after each heating cycle above the material's melting point.
Claim 30
Dependent Claim
28 words
The process as claimed in claim 23, wherein said material maintained at a temperature within 100° K. above or below its melting point for at least 1 minute.
Claim 31
Dependent Claim
24 words
The process as claimed in claim 16, wherein said un-textured ceramic material is exposed to a magnetic field of at least 10 4 Oe.
Claim 32
Dependent Claim
21 words
The process as claimed in claim 29, wherein the material is exposed to said magnetic field for at least 1 minute.
Claim 33
Dependent Claim
49 words
A process for bulk textured materials comprising the steps of: providing an un-textured bulk material, having anisotropy in at least one of paramagnetic and diamagnetic susceptibility; heating said material sufficiently to initiate substantial grain growth; subjecting said heated material to a magnetic field of at least 10 4 Oe.
Claim 34
Dependent Claim
49 words
A process for bulk textured materials comprising the steps of: providing an un-textured bulk material, having anisotropy in at least one of paramagnetic and diamagnetic susceptibility; heating said material sufficiently to initiate substantial grain growth; subjecting said heated material to a magnetic field of at least 10 4 Oe.
Claim 35
Dependent Claim
50 words
A process for producing elongated textured materials comprising the steps of: providing an un-textured elongated material, having anisotropy in at least one of paramagnetic and diamagnetic susceptibility; heating said material sufficiently to initiate substantial grain growth; subjecting said heated material to a magnetic field of at least 10 4 Oe.
Claim 36
Dependent Claim
50 words
A process for producing elongated textured materials comprising the steps of: providing an un-textured elongated material, having anisotropy in at least one of paramagnetic and diamagnetic susceptibility; heating said material sufficiently to initiate substantial grain growth; subjecting said heated material to a magnetic field of at least 10 4 Oe.
Claim 37
Dependent Claim
64 words
A process for producing textured thin film materials comprising the steps of: providing an un-textured thin film material, other than thin films having a sodium thallium (NaTl) type crystal structure, having anisotropy in at least one of paramagnetic and diamagnetic susceptibility; heating said material sufficiently to initiate substantial grain growth; subjecting said heated material to a magnetic field of at least 10 4 Oe.
Claim 38
Dependent Claim
64 words
A process for producing textured thin film materials comprising the steps of: providing an un-textured thin film material, other than thin films having a sodium thallium (NaTl) type crystal structure, having anisotropy in at least one of paramagnetic and diamagnetic susceptibility; heating said material sufficiently to initiate substantial grain growth; subjecting said heated material to a magnetic field of at least 10 4 Oe.
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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) | 1995-01-06 | 1995-07-08 | 1996-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-01-06 | 1999-07-08 | 2000-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-01-06 | 2003-07-08 | 2004-01-07 | $7700.00 | Window Closed / Lapsed |