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

A polymer-assisted, high-temperature superconducting technology, applied in the usage of superconducting elements, superconducting/high-conducting conductors, manufacturing/processing of superconducting devices, etc., can solve the problem of high cost, complicated system of physical vapor deposition method, and unsuitability for industrial production and other problems, to achieve the effect of easy operation and control, smooth and compact surface, and excellent performance

Inactive Publication Date: 2008-10-08
SOUTHWEST JIAOTONG UNIV
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  • Description
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Problems solved by technology

However, the physical vapor deposition method is complex and e...

Method used

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

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specific Embodiment approach

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

[0027] a. Preparation of anhydrous solution: Dissolve terbium acetate and cerium acetylacetonate in acetic acid according to the ratio of cations, namely terbium (Tb): cerium (Ce) = 0.01: 0.99, to form an anhydrous solution.

[0028] b. Colloid preparation: Add polyvinyl butyral (PVB) to the anhydrous solution in step a to form a colloid with good film-forming properties.

[0029] c. Colloid coating and drying: the colloid prepared in step b is coated on the Ni alloy substrate, and then dried at 200°C.

[0030] Thermal decomposition treatment before sintering: put the colloid-coated substrate in a sintering furnace, slowly increase the temperature of the furnace from room temperature to 210°C, and then rise to 290°C at a rate of 0.15°C / min, and keep the temperature for 20 minutes.

[0031]d. Sintering phase formation: put the thermally decomposed substrate into the sintering furnace, rapidly raise the furnace...

Embodiment 2

[0033] The preparation method of this example consists of the following steps in turn:

[0034] a. Preparation of anhydrous solution: dissolving praseodymium propanol and cerium acetylacetonate in methanol at a ratio of cation ratio Pr:Ce=0.1:0.9 to form an anhydrous solution.

[0035] b. Colloid preparation: Add polyethylene glycol (PEG) to the anhydrous solution in step a to form a colloid with good film-forming properties.

[0036] c. Colloid coating and drying: Coating the colloid prepared in step b on the Ni alloy substrate, and drying at 100°C.

[0037] 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 .

[0038] d. Sintering phase formation: put the thermally decomposed substrate into the sintering furnace, rapidly raise the furnace temperature to 850°...

Embodiment 3

[0040] The preparation method of this example consists of the following steps in turn:

[0041] a. Preparation of anhydrous solution: Dysprosium acetylacetonate and cerium acetylacetonate were dissolved in ethylene glycol methyl ether according to the ratio of cations Dy:Ce=0.3:0.7 to form an anhydrous solution.

[0042] b. Colloid preparation: Add polyvinylpyrrolidone (PVP) to the anhydrous solution in step a to form a colloid with good film-forming properties.

[0043] c. Colloid coating and drying: the colloid prepared in step b is coated on the Ni alloy substrate, and then dried at 150°C.

[0044] 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 215°C, and rise to 350°C at a speed of 0.5°C / min, and keep it for 18 minutes .

[0045] d. Sintering phase formation: put the thermally decomposed substrate into the sintering furnace, rapidly raise ...

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Abstract

A method for producing the buffer layer of a conductor coated with high temperature superconducting coating by means of macromolecule assisted deposition, which comprises: a. preparing waterless: weigh rare-earth acetate, or rare-earth propoxide, or rare-earth acetylacetonate, or zirconium propoxide, or zirconium n-butoxide and cerium acetylacetonate at an ionic ratio of rare-earth or zirconium: cerium as x:1-x (0.01<=x<=0.5), dissolve the compound in an organic solvent to form a waterless; b. preparing colloid: add polyvinyl butyral, or polyethylene glycol, or polyvinyl pyrrolidone, or polyvinyl alcohol, or polyoxyethylene to the waterless solution to form colloid; c. coating the colloid and drying: coat the colloid on a substrate and then dry the substrate; d. sintering: load the substrate into a sintering oven, heat up to 850-1150 DEG C at 5-100DEG C/min, hold for 0.25-2h, and drop the temperature at 1-2 DEG C/min 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 critical thickness of 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 赵勇蒲明华张红李果雷鸣程翠华
Owner SOUTHWEST JIAOTONG UNIV
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