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Preparation method of high temperature superconducting coated conductor La0.7Sr0.3MnO3 buffer layer thin film

A technology of coated conductors and high-temperature superconductors, which is applied in cable/conductor manufacturing, electrical components, circuits, etc., can solve problems such as strong irritation, expensive metal alkoxides, and high toxicity, so as to increase film formation and avoid Formation of holes and cracks, effect of increasing viscosity

Active Publication Date: 2014-01-15
四川中创登峰科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Metal alkoxides are expensive, highly toxic, and require toxic reagents such as methanol and ethylene glycol as solvents. Acetate salts require acetic acid as a solvent. Acetic acid is corrosive, and its vapor is strongly irritating to the eyes and nose. , easy to produce toxic gas and film cracks during heat treatment

Method used

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  • Preparation method of high temperature superconducting coated conductor La0.7Sr0.3MnO3 buffer layer thin film
  • Preparation method of high temperature superconducting coated conductor La0.7Sr0.3MnO3 buffer layer thin film
  • Preparation method of high temperature superconducting coated conductor La0.7Sr0.3MnO3 buffer layer thin film

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Embodiment 1

[0035] A kind of preparation high temperature superconducting coating conductor La 0.7 Sr 0.3 MnO 3 The method for buffer layer thin film, its step is:

[0036] a. Preparation of anhydrous solution: Dissolve lanthanum nitrate, strontium nitrate and manganese nitrate in N, N-dimethylformamide under ultrasonic conditions with the ratio of lanthanum, strontium and manganese ions being 7:3:10 In, an anhydrous solution is formed; the total concentration of metal ions in the anhydrous solution is 0.1mol / L,

[0037] b. Colloid preparation: Add polyvinylpyrrolidone K30 to the anhydrous solution in step a to form a colloid under ultrasonic conditions; the amount of compound polyvinylpyrrolidone K30 added is 3% of the total mass of the colloid.

[0038] c. Colloid coating and drying: Coat the colloid prepared in step b on the lanthanum aluminate substrate, and then dry it in an infrared drying oven; the specific method of coating the colloid on the substrate is to place the substrate...

Embodiment 2

[0043] A kind of preparation high temperature superconducting coating conductor La 0.7 Sr 0.3 MnO 3 The method for buffer layer thin film, its step is:

[0044] a. Preparation of anhydrous solution: Dissolve lanthanum nitrate, strontium nitrate and manganese nitrate in N, N-dimethylformamide under ultrasonic conditions with the ratio of lanthanum, strontium and manganese ions being 7:3:10 In, an anhydrous solution is formed; the total concentration of metal ions in the anhydrous solution is 0.3mol / L,

[0045] b. Preparation of colloid: Add polyvinylpyrrolidone K30 to the anhydrous solution in step a, and form a colloid under ultrasonic conditions; the amount of compound polyvinylpyrrolidone K30 added is 5% of the total mass of the colloid.

[0046] c. Colloid coating and drying: Coat the colloid prepared in step b on the lanthanum aluminate substrate, and then dry it in an infrared drying oven; the specific method of coating the colloid on the substrate is to place the subs...

Embodiment 3

[0051] A kind of preparation high temperature superconducting coating conductor La 0.7 Sr 0.3 MnO 3 The method for buffer layer thin film, its step is:

[0052] a. Preparation of anhydrous solution: Dissolve lanthanum nitrate, strontium nitrate and manganese nitrate in N, N-dimethylformamide under ultrasonic conditions with the ratio of lanthanum, strontium and manganese ions being 7:3:10 In, an anhydrous solution is formed; the total concentration of metal ions in the anhydrous solution is 0.4mol / L,

[0053] b. Colloid preparation: Add polyvinylpyrrolidone K30 to the anhydrous solution in step a, and form a colloid under ultrasonic conditions; the amount of compound polyvinylpyrrolidone K30 added is 7% of the total mass of the colloid.

[0054] c. Colloid coating and drying: Coat the colloid prepared in step b on the lanthanum aluminate substrate, and then dry it in an infrared drying oven; the specific method of coating the colloid on the substrate is to place the substra...

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Abstract

The invention discloses a preparation method of a high temperature superconducting coated conductor La0.7Sr0.3MnO3 buffer layer thin film. The preparation method mainly comprises the steps of a, lanthanum nitrate, strontium nitrate and manganese nitrate are dissolved in N, N-dimethyl formamide to form an anhydrous solution, wherein the number ratio of lanthanum ions, strontium ions and manganese ions is 7:3:10; b, polyvinylpyrrolidone K30 is added into the anhydrous solution of step a to form colloid; c, the colloid prepared by step b is coated on a lanthanum aluminum oxide substrate, and then drying in an infrared drying box is carried out; and d, a substrate plate which is dried by step c is placed in a tube type furnace, undergoes thermal insulation at the temperature of 160 to 220 DEG C, is slowly heated to the temperature of 500 to 540 DEG C for thermal insulation, and finally undergoes annealing at the temperature of 830 to 870 DEG C. According to the method, a good LSMO thin film with a smooth surface can extends and grows on the lanthanum aluminum oxide (LaAlO3) substrate; and the method has the advantages of low preparation cost and less environment pollution, and is suitable for mass production.

Description

technical field [0001] The invention relates to a high-temperature superconducting coating conductor buffer layer and a film preparation method, in particular to a high-temperature superconducting coating conductor La 0.7 Sr 0.3 MnO 3 Buffer layer thin film method. Background technique [0002] LSMO (La 0.7 Sr 0.3 MnO 3 ) thin film is a functional material with a wide range of uses, and has great application prospects in the field of buffer layers of high-temperature superconducting materials. [0003] After the advent of the high-temperature superconductor YBCO, people have paid great attention to the preparation of high-quality high-temperature superconductors in order to use their properties more widely. In practical applications, the buffer layer is usually prepared on the substrate first, and then the superconducting layer is prepared. The buffer layer needs to match the lattice of the substrate and the superconducting layer, and its texture is good, flat and den...

Claims

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Application Information

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IPC IPC(8): H01B13/00
Inventor 羊新胜张敏赵勇魏占涛吕莉
Owner 四川中创登峰科技有限公司
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