Oxide superconductor and its manufacturing method

A technology of superconducting conductor and manufacturing method, which is applied in the manufacture/processing of superconductor device, cable/conductor manufacture, superconducting/high-conducting conductor, etc., can solve the problem of high manufacturing cost, insufficient superconducting characteristics, continuous oxide superconductor layer, etc. problems such as sexual damage, and achieve the effect of low cost and high strength

Inactive Publication Date: 2007-02-28
FUJIKURA LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the base material having the polycrystalline intermediate layer 192 requires the use of an extremely expensive technique called ion beam sputtering for its film formation, and currently only a base material production rate of about 1 m / h can be obtained, and the production cost is extremely high. high problem spot
[0009] On the other hand, it is desirable to use an oriented Ag substrate with an Ag rolling texture to improve the productivity of the substrate, and the manufacturing cost is relatively low. However, it is almost impossible to achieve 1 million A / cm 2 In the above high Jc reports, the lack of superconducting properties has become a problem
This is probably because the continuity of the oxide superconductor layer was impaired due to irregularities in the crystal grain boundaries of the Ag substrate.

Method used

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  • Oxide superconductor and its manufacturing method
  • Oxide superconductor and its manufacturing method
  • Oxide superconductor and its manufacturing method

Examples

Experimental program
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Effect test

no. 1 Embodiment approach

[0079] Fig. 1 is a schematic cross-sectional structure of an oxide superconducting conductor according to a first embodiment of the present invention. The oxide superconducting conductor S shown in the figure is a substrate 38 made of Ag and an oxide superconductor layer b formed on the substrate 38 and an oxide superconductor layer b formed on the oxide superconductor layer b. The stabilization layer a is laminated in order. Therefore, the surface layer portion of the substrate 38 is formed with a diffusion layer c of a layer in which Cu is diffused into Ag constituting the substrate 38.

[0080] The base material 38 may be elongated, but it is particularly preferable to use an orientation tape of Ag that produces a rolled texture, and it may be provided with a diffusion layer in which Cu is diffused into the orientation tape. Alternatively, it may be provided with an Ag film having a rolling texture on one or both surfaces of a strip-shaped substrate such as a metal belt. As the...

no. 2 Embodiment approach

[0087] [Base material for oxide superconducting conductors]

[0088] 2A is a schematic diagram of a cross-sectional structure example of one embodiment of a substrate for an oxide superconducting conductor of the present invention, and FIG. 2B is a schematic diagram of another embodiment of a substrate for an oxide superconducting conductor of the present invention, and FIG. The conductive substrate 10 is composed of a metal base material 1 made of a high-strength metal material and an Ag foil (Ag layer) 2 attached to the metal base material 1. The oxide superconducting conductor substrate 20 shown in FIG. 2B is composed of a metal base material 11 and a barrier layer 13 formed on the metal base material 11 and an Ag foil (Ag layer) 12 pasted on the barrier layer 13 constitute. 2A and 2B only show the cross-sectional structure of the oxide superconducting conductor, but it is actually a strip extending in a direction perpendicular to the paper surface.

[0089] The metal base mate...

no. 3 Embodiment approach

[0106] 4 is a schematic cross-sectional structure of an oxide superconducting conductor according to the third embodiment of the present invention. FIG. 4A is an example of the structure when an Ag substrate is used, and FIG. 4B is a structure when an Ag layer is formed on a metal base material example.

[0107] The oxide superconducting conductor shown in FIG. 4A is provided with a base material 21 made of Ag and a first oxide superconductor layer 22a, a second oxide superconductor layer 22b, The third oxide superconductor layer 22c is formed. Therefore, the first oxide superconductor layer 22a has a higher Cu content than the other oxide superconductor layers 22b and 22c.

[0108] The base material 21 shown in FIG. 4A may be elongated, but it is particularly preferable to use an orientation band of Ag that produces a rolled texture, or it may be provided with a diffusion layer in which Cu is diffused in the orientation band. Or it may be provided with an Ag film having a rolled ...

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Abstract

The object of the present invention is to provide an oxide superconductor having superior strength and superconductor characteristics, and its production method. In order to achieve the above object, the present invention provides an oxide superconductor layer (d) obtained by a method in which a raw material gas of an oxide superconductor is chemically reacted on a base material provided with an Ag layer (b) having a rolling texture formed on at least one side of a base material, a diffusion layer (c) in which Cu is diffused in Ag is formed on the surface of the above base material, and the above oxide superconductor layer is formed on the above diffusion layer; furthermore, an oxide superconductor comprising the sequential generation of a plurality of layers of oxide superconductor containing Cu by CVD on a base material provided with an Ag layer (25) having a rolling texture formed on at least one side of a base material, whereby the Cu content of the oxide superconductor layer (22a) immediately above the base material is made to have a higher concentration of Cu than the other oxide superconductor layers (22b,22c).

Description

Technical field [0001] The invention relates to an oxide superconducting (electric) conductor that can be used in the fields of superconducting power cables, superconducting magnets, superconducting energy storage, superconducting power generation devices, medical MRI devices, superconducting current wires and the like, and a manufacturing method thereof. Background technique [0002] Existing known methods for manufacturing oxide superconducting conductors are in addition to pressing the powder of the oxide superconductor or the mixed powder that can be converted into the composition of the oxide superconductor by heat treatment into a cylindrical shape, inserting it into a silver tube, and performing wire drawing. Or the rolling process and the heat treatment process to wire the powder into the tube method (PIT method) equivalent phase method, there is also the continuous formation of oxidation on long substrates such as metal strips by vapor phase methods such as laser vapor d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B12/00H01B13/00C23C12/00C23C16/40C23C16/54C23C26/00C23C28/04H01L39/24
CPCC23C28/3455C23C28/322C23C16/408C23C28/345C23C16/545C23C28/321H01L39/2461Y10S428/93H01L39/2438C23C12/00C23C26/00C23C28/325H10N60/0436H10N60/0632
Inventor 尾锅和宪齐藤隆鹿岛直二长屋重夫
Owner FUJIKURA LTD
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