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Method for preparing high temperature superconduction coating conductor buffer layer using polymer auxiliary azotate deposition

A polymer-assisted, high-temperature superconducting technology, applied in the use of superconducting elements, superconducting/high-conducting conductors, manufacturing/processing of superconducting devices, etc. and other problems, to achieve the effect of smooth and dense surface, easy operation and control, and good performance.

Inactive Publication Date: 2008-10-08
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the physical vapor deposition method is complex and expensive, and is not suitable for large-scale industrial production.

Method used

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  • Method for preparing high temperature superconduction coating conductor buffer layer using polymer auxiliary azotate deposition
  • Method for preparing high temperature superconduction coating conductor buffer layer using polymer auxiliary azotate deposition
  • Method for preparing high temperature superconduction coating conductor buffer layer using polymer auxiliary azotate deposition

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specific Embodiment approach

[0026] A kind of specific embodiment of the present invention is:

[0027] A kind of polymer-assisted nitrate deposition prepares the method for high-temperature superconducting coating conductor buffer layer, and its specific method is:

[0028] a, preparation of anhydrous solution: the rare earth nitrate samarium nitrate and cerous nitrate are dissolved in the organic solvent N, N-dimethylformamide (DMF) according to the ratio of cations, namely Sm: Ce=0.2: 0.8, to form anhydrous aqueous solution.

[0029] b. Preparation of colloid: Add polymer material polyacrylic acid (PAA) to the anhydrous solution in step a to form a colloid with good film-forming properties.

[0030] c. Colloid coating and drying: the colloid prepared in step b is coated on the Ni alloy substrate, and then dried at a temperature of 150°C.

[0031] Thermal decomposition treatment before sintering: place the colloid-coated substrate in a sintering furnace, slowly increase the temperature of the furnace ...

Embodiment 2

[0034] The specific approach in this example is:

[0035] a, preparation of anhydrous solution: holmium nitrate and cerous nitrate are dissolved in N, N-dimethylformamide (DMF) according to the ratio of cations, i.e. Ho: Ce=0.01: 0.99, to form an anhydrous solution;

[0036] B, colloid preparation: add polymethacrylic acid (PMAA) in the anhydrous solution of step a, form the good colloid of film-forming property;

[0037] c. Colloid coating and drying: Coat the colloid prepared in step b on the Ni alloy substrate, and then place it at 100°C for drying;

[0038] Thermal decomposition treatment before sintering: place the colloid-coated substrate in a sintering furnace, slowly increase the temperature of the furnace from room temperature to 200°C, and increase it to 280°C at a speed of 0.1°C / min, and keep it warm for 15 minutes .

[0039] d. Sintering phase formation: put the thermally decomposed substrate into the sintering furnace, rapidly raise the furnace temperature to 85...

Embodiment 3

[0041] The specific approach in this example is:

[0042] a, preparation of anhydrous solution: zirconium nitrate and cerous nitrate are dissolved in N,N-dimethylformamide (DMF) according to the ratio of cations, namely Zr: Ce=0.5:0.5, to form an anhydrous solution;

[0043] B, colloid preparation: add polyacrylic acid (PAA) in the anhydrous solution of a step, form the good colloid of film-forming property;

[0044] c. Colloid coating and drying: Coat the colloid prepared in step b on the Ni alloy substrate, and then dry at 200°C;

[0045] Thermal decomposition treatment before sintering: place the colloid-coated substrate in a sintering furnace, slowly increase the temperature of the furnace from room temperature to 230°C, and increase to 400°C at a rate of 1°C / min, and keep it for 20 minutes.

[0046] d. Sintering phase formation: put the thermally decomposed substrate into the sintering furnace, rapidly raise the furnace temperature to 1150°C at 100°C / min, keep it warm fo...

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Abstract

The present invention provides a method for producing the buffer layer of a conductor coated with high temperature superconducting coating by means of macromolecule assisted nitrate deposition, a. producing a waterless weigh rare earth nitrate or zirconium nitrate and cerous cerium nitrate at an ionic ratio of rare-earth or zirconium: cerium as x:1-x (0.01<=x<=0.5), and dissolve the elements in N,N-dimethyl formamide to form a waterless solution; b. preparing colloid: add polyacrylic acid or polymethacrylic acid to the waterless solution prepared in step a; c. coating the colloid and drying: coat the colloid prepared in step b on a substrate and the dry the substrate. d. sintering: load the dry substrate into a sintering oven, heat up to 850-1150 DEG C at 5-100 DEG C / min speed, hold for 0.25-2h, and then drop the oven temperature to room temperature. The method is characterized in simple process, easy operation control, low cost, and free of environment pollution; the single-layer cerium oxide buffer layer obtained can be in thickness up to 150-200nm.

Description

technical field [0001] The invention relates to a preparation method of a high-temperature superconducting coating conductor, in particular to a preparation method of a buffer layer of a high-temperature superconducting coating conductor. Background technique [0002] The second-generation high-temperature superconducting tape—rare earth barium copper oxide REBCO coated conductor, has broad application prospects in power systems due to its excellent intrinsic electromagnetic properties, especially its excellent current-carrying capacity under high magnetic fields. . [0003] The composition of the high temperature superconducting layer of the coated conductor is REBa 2 Cu 3 o x (referred to as REBCO, RE is yttrium or lanthanide). For practical applications such as superconducting wires and superconducting magnets, brittle REBCO high temperature oxide superconducting materials must be coated on metal substrates with excellent mechanical properties (strength, toughness) to...

Claims

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Application Information

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IPC IPC(8): H01B12/00H01B13/00H01L39/24
CPCY02E40/64Y02E40/60
Inventor 赵勇张红雷鸣李果蒲明华程翠华
Owner SOUTHWEST JIAOTONG UNIV
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