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Method for preparing high-temperature superconducting coating conductor CeO2 buffer layer film on biaxial texture NiW alloy substrate

A coated conductor and high-temperature superconducting technology, which is applied in the manufacture/processing of superconductor devices, metal material coating technology, coating, etc., can solve the problems of poor chemical stability, difficult acquisition, and low preparation level, etc., to achieve The effect of low price, reduced production cost, and simple production process

Inactive Publication Date: 2012-09-19
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] However, most of the chemical solution methods are prepared by metal alkoxides or macromolecular carboxylates, which have poor chemical stability, and the current domestic preparation level of many salts is not high, and it is not easy to obtain

Method used

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  • Method for preparing high-temperature superconducting coating conductor CeO2 buffer layer film on biaxial texture NiW alloy substrate
  • Method for preparing high-temperature superconducting coating conductor CeO2 buffer layer film on biaxial texture NiW alloy substrate
  • Method for preparing high-temperature superconducting coating conductor CeO2 buffer layer film on biaxial texture NiW alloy substrate

Examples

Experimental program
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Effect test

Embodiment 1

[0030] Fabrication of High Temperature Superconducting Coated Conductor CeO on Biaxially Textured NiW Alloy Substrates 2 buffer layer film, its steps are:

[0031] a. Preparation of anhydrous solution: cerium nitrate hexahydrate (Ce(NO 3 ) 3 ·6H 2 O) be dissolved in N-methylpyrrolidone (NMP), and ultrasonically make the solution uniform to form an anhydrous solution;

[0032] b. Colloid preparation: Add polyvinylpyrrolidone (PVP-K30) to the anhydrous solution in step a for ultrasonic dissolution to form a colloid. The amount of polyvinylpyrrolidone added accounts for 5% of the total mass of the colloid.

[0033] c. Colloid coating and drying: coating the colloid prepared in step b on the substrate. The specific method of coating the colloid on the substrate of the coated conductor is as follows: drop the colloid on the substrate and rotate it with a glue leveler so that the colloid is evenly coated on the substrate.

[0034] d. Thermal decomposition treatment: place the ...

Embodiment 2

[0039] The preparation method of this example consists of the following steps in turn:

[0040] a. Preparation of anhydrous solution: cerium nitrate hexahydrate (Ce(NO 3 ) 3 ·6H 2 O) be dissolved in N-methylpyrrolidone (NMP), and ultrasonically make the solution uniform to form an anhydrous solution;

[0041] b. Colloid preparation: Add polyvinylpyrrolidone (PVP-K30) to the anhydrous solution in step a for ultrasonic dissolution to form a colloid. The amount of polyvinylpyrrolidone added accounts for 4% of the total mass of the colloid.

[0042] c. Colloid coating and drying: coating the colloid prepared in step b on the substrate. The specific method of coating the colloid on the substrate of the coated conductor is as follows: drop the colloid on the substrate and rotate it with a glue leveler so that the colloid is evenly coated on the substrate.

[0043] d. Thermal decomposition treatment: place the substrate coated with colloid in a sintering furnace, and pass H into...

Embodiment 3

[0048] The preparation method of this example consists of the following steps in turn:

[0049] a. Preparation of anhydrous solution: cerium nitrate hexahydrate (Ce(NO 3 ) 3 ·6H 2 O) be dissolved in N-methylpyrrolidone (NMP), and ultrasonically make the solution uniform to form an anhydrous solution;

[0050] b. Colloid preparation: Add polyvinylpyrrolidone (PVP-K30) to the anhydrous solution in step a for ultrasonic dissolution to form a colloid. The addition of polyvinylpyrrolidone accounts for 3% of the total mass of the colloid.

[0051] c. Colloid coating and drying: coating the colloid prepared in step b on the substrate.

[0052] d. Thermal decomposition treatment: place the substrate coated with colloid in a sintering furnace, and pass H into the sintering furnace 2 5% H by volume 2 -Ar mixed gas, the furnace temperature was raised to 220°C at a speed of 0.7°C / min, and then raised to 450°C at a speed of 1.7°C / min, kept for 0.5 hours, and then the furnace was allo...

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Abstract

The invention discloses a method for preparing a high-temperature superconducting coating conductor CeO2 buffer layer film on a biaxial texture NiW alloy substrate. The method comprises the steps of dissolving cerium nitrate hexahydrate (Ce(NO3)3.6H2O into N-methyl pyrrolidone (NMP) to form an anhydrous solution; adding polyvinyl pyrrolidone (PVP-K30) to the anhydrous solution to form a colloid with good film-forming performance; coating the colloid on the biaxial texture NiW alloy substrate; putting the biaxial texture NiW alloy substrate in a sintering furnace, and sintering to form phase so as to obtain the cerium dioxide (CeO2) high-temperature superconducting coating conductor buffer layer. The method is low in manufacturing cost, is easy to obtain cerium dioxide (CeO2) film with good quality, so thatfunctions of the coating conductor buffer layer can be effectively played.

Description

technical field [0001] The invention belongs to the technical field of high-temperature superconducting material preparation, and in particular relates to the preparation technology of a high-temperature superconducting coating conductor buffer layer film. Background technique [0002] The second-generation high-temperature superconducting tape, 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 field. Developed countries have vigorously promoted the research and practical application of second-generation high-temperature superconductors based on their own technological innovation and long-term interests in electric energy, and international competition has become increasingly fierce. [0003] However, the REBCO superconducting layer relies heavily on oxygen during the preparation process, and it is easy to oxidize the metal ...

Claims

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Application Information

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IPC IPC(8): C23C20/08H01L39/24
Inventor 张欣程翠华赵勇张勇王文涛雷鸣
Owner SOUTHWEST JIAOTONG UNIV
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