US4994435A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laminated layers of a substrate, noble metal, and interlayer underneath an oxide superconductor
Assignee: Furukawa Electric Co Ltd
•
Filing: 1988-10-11
•
Granted: 1991-02-19
•
Expires: 2008-10-11
Abstract
Abstract This invention discloses an oxide superconductor shaped body including a noble metal layer formed on at least one surface of an oxide superconductor layer formed on a substrate, and a method of manufacturing oxide superconductor shaped body.
Inventors
- 👤 Shoji Shiga
- 👤 Masanori Ozaki
- 👤 Ton-Chi Chang
- 👤 Nakahiro Harada
- 👤 Masanao Mimura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:40
CPC Classifications
H; H10; H10N; H10N60/00; H10N60/20; H10N60/203; H10N60/01; H10N60/0268; H10N60/0296; H10N60/0576; H10N60/0632; H10N60/0801; H10N60/80; H10N60/85; H10N60/855; H10N60/857; Y; Y10; Y10S; Y10S505/00; Y10S505/70; Y10S505/701; Y10S505/704; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49014; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12535; Y10T428/12611; Y10T428/12618
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
104 words
An oxide superconductor shaped body comprising: a substrate consisting of a polycrystalline metal or ceramic having a thermal expansion coefficient of 5×10 -6 /° C. to 15×10 -6 /° C.; a noble metal layer directly on and in surface contact with said substrate, an interlayer of an inorganic material directly on and in surface contact with said noble metal layer consisting essentially of a material having a free energy (ΔG°)equal to or lower than that of BaO and selected from the group consisting of cubic, hexagonal, tetragonal, and rhombic materials; and an oxide superconductive layer directly on and in surface contact with said interlayer.
Claim 2
Dependent Claim
104 words
An oxide superconductor shaped body comprising: a substrate consisting of a polycrystalline metal or ceramic having a thermal expansion coefficient of 5×10 -6 /° C. to 15×10 -6 /° C.; a noble metal layer directly on and in surface contact with said substrate, an interlayer of an inorganic material directly on and in surface contact with said noble metal layer consisting essentially of a material having a free energy (ΔG°)equal to or lower than that of BaO and selected from the group consisting of cubic, hexagonal, tetragonal, and rhombic materials; and an oxide superconductive layer directly on and in surface contact with said interlayer.
Claim 3
Dependent Claim
51 words
The body according to claim 1, wherein the inorganic material is a material selected from the group consisting of MgO, BeO, BaO, SrO, TiO 2 , ZrO 2 , HfO 2 , BaTiO 3 , SrTiO 3 , BaZrO 3 , SrZrO 3 , BaHfO 3 , and SrHfO 3 .
Claim 4
Dependent Claim
48 words
The body according to claim 1, wherein the oxide consists of an oxide represented by formula AB 2 Cu 3 Ox (wherein A represents Y, S, Sc, or a rare earth element, B represents an alkaline earth metal, Cu represents copper, O represents oxygen, and X=7-δ where 1≧δ>0).
Claim 5
Dependent Claim
15 words
The body according to claim 1, wherein the oxide superconductor consists of a Cu-containing oxide.
Claim 6
Dependent Claim
32 words
The body according to claim 1, wherein the oxide superconductor layer has a thickness of 0.1 to 5 μm, which is 0.005 to 0.5 times the thickness or diameter of the substrate.
Claim 7
Dependent Claim
38 words
The body according to claim 1, wherein the interlayer has a thickness falling within a range of 0.001 to 0.5 μm, and the noble metal layer has a thickness falling within a range of 0.05 to 3 μm.
Claim 8
Dependent Claim
24 words
The body according to claim 1, wherein the noble metal is silver or a silver alloy containing 99 to 55 wt. % of silver.
Claim 9
Dependent Claim
19 words
The body according to claim 1, wherein the oxide superconductor shaped body has a wire-, strip-, or plate-like shape.
Claim 10
Dependent Claim
28 words
The body according to claim 1, wherein the substrate is selected from the group consisting of Ti, Zr, Ta, Nb, Fe, Ni, Cr, Co, Mo, and alloys thereof.
Claim 11
Dependent Claim
29 words
The body according to claim 1, wherein the substrate is selected from the group consisting of Ni-Cr alloys stainless steel, Fe-Ni-Cr alloys, Fe-Cr, Cu-Ni alloys, and Ni-Mo alloys. PG,55
Claim 12
Dependent Claim
37 words
The body according to claim 1, wherein the substrate is selected from the group consisting of SrTiO 3 , MgO, ZrO 2 , Al 2 O 3 , BeO, BN, AlN, carbon, SiO 2 and polycomponent glass.
Claim 13
Dependent Claim
29 words
The body according to claim 1, wherein the noble metal layer is selected from the group consisting of Ag, Au, Pd, Pt, In, Os, Ru, Rh, and alloys thereof.
Claim 14
Dependent Claim
45 words
The body according to claim 1, wherein the oxide superconductor consists of an oxide represented by the formula AB 2 Cu 3 O x wherein A represents Y, S, Sc, or a rare earth element, B represents an alkaline earth metal, and X=7-δ where O≦δ<0.5.
Claim 15
Dependent Claim
126 words
The body according to claim 1, wherein the substrate is selected from the group consisting of (1) Ti, Zr, Ta, Nb, Fe, Ni, Cr, Co, Mo, and alloys thereof; (2) Ni-Cr, stainless steel, Fe-Ni-Cr, Fe-Cr, Cu-Ni, and Ni-Mo alloys; and (3) SrTiO 3 , MgO, ZrO 2 , Al 2 O 3 , BeO, BN, AlN, carbon, SiO 2 and polycomponent glass; wherein the noble metal layer is selected from the group consisting of Ag, Au, Pd, Pt, In, Os, Ru, Rh, and alloys thereof; and wherein the oxide superconductor consists of an oxide represented by the formula AB 2 Cu 3 O x , wherein A represents Y, S, Sc, or a rare earth element, B represents an alkaline earth metal, and X=7-δ where O≦δ<0.5.
Claim 16
Dependent Claim
45 words
The body according to claim 13, wherein the substrate is A Ni-Mo alloy the noble metal layer is Ag of thickness 0.05 to 3 μm; the inorganic material of the interlayer is MgO of thickness 0.001 to 0.5 μm; and the oxide superconductor is Y-Ba-Cu-O.
Claim 17
Dependent Claim
46 words
The body according to claim 13, wherein the substrate is A Ni-Mo alloy; the noble metal layer is Ag-40Pd of thickness 0.05 to 3 μm; the inorganic material of the interlayer is Zro 2 of thickness 0.001 to 0.5 μm; and the oxide superconductor is Y-Ba-Cu-O.
Claim 18
Dependent Claim
46 words
The body according to claim 13, wherein the substrate is A Ni-Mo alloy the noble metal layer is Ag-25Au of thickness 0.05 to 3 μm; the inorganic material of the interlayer is BaZrO 3 of thickness 0.001 to 0.5 μm and the oxide superconductor is Y-Ba-Cu-O.
Claim 19
Dependent Claim
45 words
The body according to claim 13 wherein the substrate is an Fe-Ni-Cr alloy; the noble metal layer is Ag of thickness 0.05 to 3 μm; the inorganic material of the interlayer is MgO of thickness 0.001 to 0.5 μm; and the oxide superconductor is Y-Ba-Cu-O.
Claim 20
Dependent Claim
32 words
The body according to claim 17 wherein said interlayer consists essentially of a transition metal selected from the group consisting of Ti, Zr, Cr, Mo, W, Nb, Ta, Fe, Ni, and Co.
Claim 21
Dependent Claim
32 words
The body according to claim 17, wherein said interlayer consists essentially of an alloy of a transition metal selected from the group consisting of Ni-P, Ni-P-W, Ni-Cu, and Fe-Cr-Ni austenite stainless steel.
Claim 22
Dependent Claim
88 words
An oxide superconductor shaped body comprising: a substrate consisting of a polycrystalline metal or ceramic having a thermal expansion coefficient of 5×10 -6 /° C. to 15×10 -6 /° C.; a nobel metal layer directly on and in surface contact with said substrate, an interlayer directly on and in surface contact with said nobel metal layer, said interlayer consisting essentially of a metal selected from the group consisting of transition metals and alloys thereof; and an oxide superconductive layer directly on and in surface contact with said interlayer.
Claim 23
Dependent Claim
88 words
An oxide superconductor shaped body comprising: a substrate consisting of a polycrystalline metal or ceramic having a thermal expansion coefficient of 5×10 -6 /° C. to 15×10 -6 /° C.; a nobel metal layer directly on and in surface contact with said substrate, an interlayer directly on and in surface contact with said nobel metal layer, said interlayer consisting essentially of a metal selected from the group consisting of transition metals and alloys thereof; and an oxide superconductive layer directly on and in surface contact with said interlayer.
Claim 24
Dependent Claim
126 words
The body according to claim 21, wherein the substrate is selected from the group consisting of (1) Ti, Zr, Ta, Nb, Fe, Ni, Cr, Co, Mo, and alloys thereof; (2) Ni-Cr, stainless steel, Fe-Ni-Cr, Fe-Cr, Cu-Ni, and Ni-Mo alloys; and (3) SrTiO 3 , MgO, ZrO 2 , Al 2 O 3 , BeO, BN, AlN, carbon, SiO 2 and polycomponent glass; wherein the noble metal layer is selected from the group consisting of Ag, Au, Pd, Pt, In, Os, Ru, Rh, and alloys thereof; and wherein the oxide superconductor consists of an oxide represented by the formula AB 2 Cu 3 O x , wherein A represents Y, S, Sc, or a rare earth element, B represents an alkaline earth metal, and X=7-δ where O≦δ<0.5.
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) | 1994-02-18 | 1994-08-20 | 1995-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-02-18 | 1998-08-20 | 1999-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-02-18 | 2002-08-20 | 2003-02-19 | $7700.00 | Window Closed / Lapsed |