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EP0337699A2
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Insulating oxide composition used in a superconducting element
Assignee: Toshiba Corp
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Filing: 1989-04-10
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Granted: —
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Expires: 2009-04-10
Abstract
Abstract An insulating composition consisting of Bi, Sr, RE, Cu, O or of Tl, Ba, RE, Cu, O (wherein; RE is an element selected from a group consisting of Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu and Y) aligns properly with a crystal face of an oxide superconductor because its crystal structure is the same as or similar to that of the oxide superconductor. An insulating composition in which a part of Bi is replaced by Pb is further near the oxide superconductor its construction, and the modulation structure in this insulating composition is mitigated or disappears.
Inventors
- 👤 Noburu C/O Patent Division Fukushima
- 👤 Shunji C/O Patent Division Nomura
- 👤 Hisashi C/O Patent Division Yoshino
- 👤 Ken C/O Patent Division Ando
- 👤 Hiromi C/O Patent Division Niu
- 👤 Tomohisa C/O Patent Division Yamashita
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 05:09
CPC Classifications
B; B32; B32B; B32B18/00; C; C04; C04B; C04B35/00; C04B35/01; C04B35/45; C04B35/4504; C04B35/4512; C04B35/4521; C04B35/622; C04B35/653; H; H10; H10N; H10N60/00; H10N60/10; H10N60/12; H10N60/124; C04B2237/00; C04B2237/30; C04B2237/32; C04B2237/34; C04B2237/345; C04B2237/346; C04B2237/50; C04B2237/70; C04B2237/704; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9265; Y10S428/93; Y10S505/00; Y10S505/70; Y10S505/701; Y10S505/702; Y10S505/775; Y10S505/776; Y10S505/782
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
57 words
An insulating composition characterized in that Ca in an oxide superconductive composition consisting of Bi, Sr, Ca, Cu and O or of Tl, Ba, Ca, Cu and O is replaced by Re; wherein RE is an element selected from a group consisting of Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Ym, Yb, Lu and Y.
Claim 2
Dependent Claim
57 words
An insulating composition characterized in that Ca in an oxide superconductive composition consisting of Bi, Sr, Ca, Cu and O or of Tl, Ba, Ca, Cu and O is replaced by Re; wherein RE is an element selected from a group consisting of Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Ym, Yb, Lu and Y.
Claim 3
Dependent Claim
47 words
An insulating composition of Claim 1, characterized in that the atomic ratio of Bi, Sr, RE, Cu or of Tl, Ba, RE, Cu is 2 : X : Y : Z. wherein: 1.5 ≦ X ≦ 2.5 0.5 ≦ Y ≦ 1.5 1.8 ≦ Z ≦ 2.5
Claim 4
Independent Claim
54 words
A method of forming an insulating composition including Bi, Sr, RE, Cu by the atomic ratio of 2 : X : Y : Z, wherein: 1.5 ≦ X ≦ 2.5 0.5 ≦ Y ≦ 1.5 1.8 ≦ Z ≦ 2.5 characterized in that flux including Bi₂O₃ and CuO is used on a flux method.
Claim 5
Independent Claim
54 words
A method of forming an insulating composition including Bi, Sr, RE, Cu by the atomic ratio of 2 : X : Y : Z, wherein: 1.5 ≦ X ≦ 2.5 0.5 ≦ Y ≦ 1.5 1.8 ≦ Z ≦ 2.5 characterized in that flux including Bi₂O₃ and CuO is used on a flux method.
Claim 6
Independent Claim
102 words
A method of forming an insulating composition including Bi, Sr, RE, Cu by the atomic ratio of 2 : X : Y : Z, wherein: 1.5 ≦ X ≦ 2.5 0.5 ≦ Y ≦ 1.5 1.8 ≦ Z ≦ 2.5 characterized in that the composition of positive ions in respective raw materials of Bi, Sr, RE, Cu maintains a following formula on a flux method: β Bi₂O₃ + γ{( Sr.RE ) O} + εCuO, in mol ratio % (β,γ,ε) wherein; 5 ≦ β ≦ 25 20 ≦ γ ≦ 60 10 ≦ ε ≦ 60 2β + γ + ε = 100
Claim 7
Independent Claim
102 words
A method of forming an insulating composition including Bi, Sr, RE, Cu by the atomic ratio of 2 : X : Y : Z, wherein: 1.5 ≦ X ≦ 2.5 0.5 ≦ Y ≦ 1.5 1.8 ≦ Z ≦ 2.5 characterized in that the composition of positive ions in respective raw materials of Bi, Sr, RE, Cu maintains a following formula on a flux method: β Bi₂O₃ + γ{( Sr.RE ) O} + εCuO, in mol ratio % (β,γ,ε) wherein; 5 ≦ β ≦ 25 20 ≦ γ ≦ 60 10 ≦ ε ≦ 60 2β + γ + ε = 100
Claim 8
Dependent Claim
17 words
An insulating composition of Claim 1 characterized in that a part of Bi is replaced by Pb.
Claim 9
Dependent Claim
41 words
An insulating composition of Claim 5 characterized in that the atomic ratio of Bi, Pb, Sr, RE, Cu, O is 2-W : W : 2 : 1 : 2 : 8+δ. wherein: O < W ≦ 1.5 δ is oxygen defect
Claim 10
Dependent Claim
18 words
An insulating composition of Claim 6 characterized in that W is represented by: 0.2 ≦ W ≦ 1.0
Claim 11
Dependent Claim
43 words
An insulating composition of Claim 5 characterized in that the atomic ratio of Bi, Pb, Sr, RE, Cu, O is 2-W : W : 2 : 2 : 3 : 10+ δ . wherein: O < W ≦ 1.5 δ is oxygen defect
Claim 12
Dependent Claim
18 words
An insulating composition of Claim 8 characterized in that W is represented by: 0.2 ≦ W ≦ 1.0
Claim 13
Dependent Claim
25 words
A superconductive element characterized in that on an oxide superconductor is formed said oxide insulating composition as claimed in Claim 1 as an insulating layer.
Claim 14
Dependent Claim
24 words
A superconductive element characterized in that an oxide superconductor is formed on said insulating composition as claimed in Claim 1 using as a substrate.
References Cited (Backward Citations)
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