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Oxide superconductor composition, oxide superconductor wire, and production method for oxide superconductor wire

A technology of superconducting wires and oxides, which is used in cable/conductor manufacturing, copper compounds, superconducting/high-conducting conductors, etc., can solve the problems of reduced critical current density Jc characteristics, difficulty in epitaxial growth, and difficulty in obtaining thick superconductor films. , to achieve the effect of high speed, low cost, and thick film

Inactive Publication Date: 2015-10-28
SWCC SHOWA CABLE SYST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

As a result, epitaxial growth becomes difficult when the obtained oxide superconducting precursor thick film is crystallized to obtain a superconductor film, and it is difficult to obtain a superconductor thick film with excellent in-plane orientation, and the critical current density Jc characteristic reaches its peak
Also, the critical current density Jc characteristic is significantly lowered due to the generation of cracks

Method used

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  • Oxide superconductor composition, oxide superconductor wire, and production method for oxide superconductor wire
  • Oxide superconductor composition, oxide superconductor wire, and production method for oxide superconductor wire
  • Oxide superconductor composition, oxide superconductor wire, and production method for oxide superconductor wire

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0079] In Example 1, using the composition for an oxide superconductor according to this embodiment, on a tape-shaped substrate, the figure 1 A~ figure 1 The MOD method shown in E forms a REBaCu-based oxide superconductor (YBCO superconductor). The base material of this embodiment 1 has: Hastelloy (HASTELLOY, registered trademark) as substrate; 2 And formed. The mixed solution 30 used in the dip coating method (refer to figure 1 A~ figure 1 E) Contains: Y-propionic acid, Ba-TFA, Cu-2-ethylhexanoic acid not containing fluorine atoms; and an organic solvent which dissolves these Y-propionic acid, Ba-TFA, Cu-2-ethyl Hexanoic acid component. In addition, the organic solvent contains an amino group-containing solubilizer (here, tetramethylurea) that dissolves propionic acid. In the dip coating method, the critical primary coating film thickness of the superconductor is 1.2 [μm / coat] (coating speed 5 [m / h]), and the primary coating film thickness is 0.49 [μm / coat]. This is re...

Embodiment 2

[0081] When forming a YBCO superconductor by the MOD method in the same manner as in Example 1, compared with Example 1, in the coating process, the coating speed is doubled to 10 [m / h], and the substrate is dip-coated Mixed solution 30 (refer to figure 1 A~ figure 1 E), forming a YBCO superconductor. In Example 2, the film thickness of one coat was 0.77 [μm / coat]. This is repeated several times until a desired film thickness (here, a film thickness exceeding 2.0 [μm]) is obtained.

Embodiment 3

[0083]A mixed solution that does not contain a solubilizer having an amino group in the organic solution constituting the mixed solution used in Example 1 was coated on the same base material as that of Example 1 by the dip coating method, and the coated The applied coating film is subjected to pre-calcination heat treatment and main calcination heat treatment to form an oxide superconducting wire. The coating speed was set at 5 [m / h], and the conditions in other coating, pre-calcination heat treatment, and main calcination heat treatment were carried out under the same conditions as those in Examples.

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Abstract

Provided is an oxide superconductor composition that makes it possible to increase film thickness, increase production speed, and decrease costs when producing a superconductor wire. The composition is for forming a REBaCuO-type oxide superconductor (wherein RE is at least one element selected from the group consisting of Y, Nd, Sm, Gd, Dy, Eu, Er, Yb, Pr, and Ho). The composition is applied to a base material, a preliminary firing treatment is performed after the application in order to form an oxide superconductor precursor, and a main firing treatment is performed in order to form an oxide semiconductor. The oxide superconductor comprises, as essential components thereof, an RE salt of a carboxylic acid that serves as an RE component, that does not contain a ketone group, and that has 3-8 carbon atoms, barium trifluoroacetate that serves as a Ba component, one or more copper salts that serve as a Cu component and that are selected from the group consisting of copper salts of branched saturated aliphatic carboxylic acids having 6-16 carbon atoms and copper salts of alicyclic carboxylic acids having 6-16 carbon atoms, and an organic solvent that dissolves the aforementioned metal salt components.

Description

technical field [0001] The present invention relates to a REBaCuO (RE means at least one element selected from the group consisting of Y, Nd, Sm, Gd, Dy, Eu, Er, Yb, Pr, and Ho)-based oxide superconductors , an oxide superconducting wire and a method for manufacturing the oxide superconducting wire. Background technique [0002] Oxide superconductors are expected to be applied to superconducting magnets, superconducting cables, power equipment, etc. because their critical temperature (Tc) exceeds the temperature of liquid nitrogen, and various researches are rapidly progressing. [0003] In order to apply oxide superconductors to these superconducting magnets, superconducting cables, power equipment, etc., it is necessary to manufacture long wires with a high critical current density Jc and a high critical current value Ic. On the other hand, in order to obtain an oxide superconductor as a long strip-shaped wire, it is necessary to form an oxide superconductor on a strip-sh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B12/06C01G1/00C01G3/00H01B13/00
CPCH01L39/2451C01G3/006C01P2006/40H01L39/126H10N60/857H10N60/0548H01B12/00H01B12/06H01B13/00
Inventor 中冈晃一吉积正晃和泉辉郎塩原融中村达德
Owner SWCC SHOWA CABLE SYST CO LTD