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Method for producing highly-textured, strip-shaped, high-temperature superconductors

A strip-shaped, metal-based technology, applied in the field of manufacturing high-textured strip-shaped high-temperature superconductors, can solve problems such as limiting the choice of metal substrates

Active Publication Date: 2007-07-04
AMERICAN SUPERCONDUCTOR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0025] A further disadvantage of the CSD methods hitherto for applying buffer layers is that high temperatures must be provided for crystallization of the buffer layer, which are usually significantly above 1000° C. (D4), thus severely limiting the availability of suitable metal substrates. choose

Method used

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  • Method for producing highly-textured, strip-shaped, high-temperature superconductors
  • Method for producing highly-textured, strip-shaped, high-temperature superconductors
  • Method for producing highly-textured, strip-shaped, high-temperature superconductors

Examples

Experimental program
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Effect test

example 1

[0043] On a textured metal tape, La was applied in a reproducible experiment 2 Z r2 o 7 (LZO) as a buffer layer. The metal strip is a pure nickel strip. By adding a proportion of tungsten alloy components up to 8%, the tensile strength of the strip can be increased without affecting the coating results in this example. Other alloys such as Ni-0.1%Mn may also be used without affecting the results of this example. In comparative experiments, different coating solvents were used, the first solution corresponding to the prior art and the second solution according to the invention.

[0044] Both coating solutions are based on (2,4) lanthanum(III) glutarate and (2,4) zirconium(IV) glutarate (acetylacetonate) ((2,4) lanthanum(III) glutarate , La[CH 3 COCHCOCH 3 ] 3 · x H 2 O: Alfa Aesar, 99.9% (REO), powder, melting point: 14.3°C; (2,4) zirconium glutarate, Zr[CH 3 COCHCOCH 3 ] 4 ; Strem Chemical, > 98%, crystalline). According to buffer stoichiometry (Pufferstchiometri...

example 2

[0050] On textured metal tapes (Ni-5%W) the same reproducible application of Y by the CSD method 2 o 3 . In the comparative tests, different coating solutions were used as in Example 1. Solution 1 corresponds to the prior art, while the second solution is according to the invention.

[0051] In all experiments, 2,4-glutaric acid Y(III) (yttrium(III) acetylacetonate, Y(CH 3 COCHCOCH 3 ) 3 · x H 2 O; Alfa Aesar, 99.9%, powder) as raw material. Previous precursor solutions were prepared according to the prior art by using 2-methoxyethanol (CH 3 OCH 2 CH 2 OH): Merck, for analysis, ACS, 99.3%, melting point: -85°C, boiling point: 124-125°C, flash point: 46°C) or acetylacetone (2, 4-pentanedione, CH 3 COCH 2 COCH 3 : Merck, ≥99.5%, melting point: -23°C, boiling point: 140°C, flash point: 34°C), methanol (CH 3 OH: Merck, for analysis, ACS, ISO, ≥99.8%, melting point: -98°C, boiling point: 64.5°C, flash point: 11°C) and isobutylamine (1-amino-2-methylpropane, (CH 3 ) 2...

example 3

[0058] On textured metal strips (Ni-5%W), La 2 Zr 2 o 7 (LZO) as a buffer layer.

[0059] The coating solution is based on (2,4) lanthanum(III) glutarate and (2,4) zirconium(IV) glutarate (acetylacetonate) ((2,4) lanthanum(III) glutarate, La[ CH 3 COCHCOCH 3 ] 3 · x H 2 O: Alfa Aesar, 99.9% (REO), powder, melting point: 14.3°C; (2,4) zirconium (IV) glutarate, Zr[CH 3 COCHCOCH 3 ] 4 ; Strem Chemical, > 98%, crystalline). According to buffer stoichiometry, for La 2 Zr 2 o 7 Both solutions were adjusted to a concentration of 0.1M. In order to precisely adjust the metal content, the raw material is characterized by means of ICP-OES (Inductively Coupled Plasma-Atomic Emission Spectroscopy). As a solvent for the solution, propionic acid (propionic acid, CH 3 CH 2 COOH: Merck, ≥99%, melting point: -21°C, boiling point: 141°C, flash point: 50°C).

[0060] coated on a 5 x 0.1mm 2 The cross-section and the length of 50m are carried out in a continuous coating device. ...

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Abstract

The invention relates to a wet-chemical method for producing strip-shaped high-temperature superconductors comprising a metal substrate, at least one buffer layer and a high-temperature superconducting layer. The aim of the invention is to improve the texture transfer ability of the buffer layer. For this purpose, a polar solvent having at least one free hydroxyl group is used during production of a coating solution that is applied to the metal substrate and that forms the buffer layer after drying and annealing.

Description

technical field [0001] The present invention relates to a method for producing highly textured tape-shaped high-temperature superconductors, as well as intermediate and final products of the method. Background technique [0002] Reference is made below to documents D1-D10 below. [0003] D1: S.Sathyamurthy, M.Paranthaman, H-Y.Zhai, H.M.Christen, P.M.Martin, and A.Goyal, J.Mater.Res., Vol.17, No.9, 2002, 2181-2184 [0004] D2: T.G. Chirayil, M.Paranthaman, D.B.Beach, D.F.Lee, A.Goyal, R.K.Williams, X.Cui, D.M.Kroeger, R.Feenstra, D.T.Verebelyi, D.K.Christen, physica C 336, 2000, 63-69 [0005] D3: S.Sathyamurthy, M.Paranthaman, T.Aytug, B.W.Kang, P.M.Martin, A.Goyal, D.M.Kroeger, D.K.Christen, J.Mater.Res., Vol.17, No.6, 2002, 1543-1549 [0006] D4: E. Celik, Y. Akin, W. Sigmund, Y. S. Hascicek, Mat. Sci. Eng. B106, 2004, 182-190 [0007] D5: M.S.Bhuiyan, M.Paranthaman, S.Sathyamurthy, T.Aytug, S.Kang, D.F.Lee, A.Goyal, E.A.Payzant, and K Salama, Supercond.Sci.Technol.16, ...

Claims

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Application Information

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IPC IPC(8): C23C18/12H01B3/12C04B35/50H01L39/14C04B35/624H01B12/02
CPCC23C18/1283H01L39/2461C23C18/1241C23C18/1225C23C18/1216C23C18/06Y10S505/741H10N60/0632C23C18/12H01B3/12C04B35/50H10N60/20
Inventor M·贝克尔B·施洛巴赫H·克诺特B·舒普-尼瓦R·许纳M·法尔特
Owner AMERICAN SUPERCONDUCTOR
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