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Nb-doped YBCO (Yttrium Barium Copper Oxide) super-conducting film and preparation method

A technology of superconducting thin films and thin films, which is applied in the usage of superconducting elements, superconducting devices, superconducting/high-conducting conductors, etc., can solve the problem that it is difficult to flexibly control the amount of doping, large-scale industrialization is disadvantageous, and the cost is expensive. and other problems, to achieve the effect of improving field performance, low cost, and simple equipment

Active Publication Date: 2014-05-07
深创超导(深圳)科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, methods such as PLD and magnetron sputtering are mainly used to achieve the doping of YBCO. Although these methods have obvious doping effects, the equipment is complicated, requires high vacuum, is expensive, and it is not easy to flexibly control the doping amount. These are unfavorable for large-scale industrialization

Method used

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  • Nb-doped YBCO (Yttrium Barium Copper Oxide) super-conducting film and preparation method
  • Nb-doped YBCO (Yttrium Barium Copper Oxide) super-conducting film and preparation method
  • Nb-doped YBCO (Yttrium Barium Copper Oxide) super-conducting film and preparation method

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Effect test

Embodiment 1

[0028] 1. Preparation of Nb-doped YBCO precursor:

[0029] (1) Dissolve yttrium acetate and barium acetate in deionized water at a molar ratio of 1:2. After fully stirring and dissolving at 40°C, add three Fluoroacetic acid, reacted at 40°C for 2 hours, then rotovapped at 40°C to obtain a white powder, which was dissolved in anhydrous methanol, Y, the precursor of Ba.

[0030] (2) Dissolve copper acetate and α-methacrylic acid in anhydrous methanol at a molar ratio of 1:4, reflux at 70°C for more than 2 hours, and then rotary evaporate at 40°C to obtain a blue gel, Dissolved with anhydrous methanol to obtain Cu precursor.

[0031] (3) Filter the precursor solutions of Y, Ba, and Cu respectively and mix them to obtain a blue transparent solution. Rotate evaporation at 40°C to obtain a blue gel, and then dilute with anhydrous methanol to control the total cation concentration to 1.5mol / L, is the YBCO precursor.

[0032] (4) Configure Y and Ba precursors according to (1).

...

Embodiment 2

[0040] 1. Preparation of Nb-doped YBCO precursor:

[0041](1) Dissolve yttrium acetate and barium acetate in deionized water at a molar ratio of 1:2. After fully stirring and dissolving at 50°C, add three Fluoroacetic acid, reacted at 50°C for 3 hours, then rotovapped at 50°C to obtain a white powder, which was dissolved in anhydrous methanol, Y, the precursor of Ba.

[0042] (2) Dissolve copper acetate and α-methacrylic acid in anhydrous methanol at a molar ratio of 1:4, reflux at 80°C for more than 3 hours, and then rotary evaporate at 50°C to obtain a blue gel, Dissolved with anhydrous methanol to obtain Cu precursor.

[0043] (3) Filter the precursor solutions of Y, Ba, and Cu respectively and mix them to obtain a blue transparent solution. Rotate evaporation at 50°C to obtain a blue gel, and then dilute with anhydrous methanol to control the total cation concentration to 1.0mol / L, is the YBCO precursor.

[0044] (4) Configure Y and Ba precursors according to (1).

[...

Embodiment 3

[0052] 1. Preparation of Nb-doped YBCO precursor:

[0053] (1) Dissolve yttrium acetate and barium acetate in deionized water at a molar ratio of 1:2. After fully stirring and dissolving at 60°C, add three Fluoroacetic acid, reacted at 60°C for 4 hours, then rotovapped at 60°C to obtain a white powder, which was dissolved in anhydrous methanol, Y, the precursor of Ba.

[0054] (2) Dissolve copper acetate and α-methacrylic acid in anhydrous methanol at a molar ratio of 1:4, reflux at 90°C for more than 4 hours, and then rotary evaporate at 60°C to obtain a blue gel, Dissolved with anhydrous methanol to obtain Cu precursor.

[0055] (3) Filter the precursor solutions of Y, Ba, and Cu respectively and mix them to obtain a blue transparent solution. Rotate evaporation at 60°C to obtain a blue gel, and then dilute with anhydrous methanol to control the total cation concentration to 2.0mol / L, is the YBCO precursor.

[0056] (4) Configure Y and Ba precursors according to (1).

...

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Abstract

The invention provides an Nb-doped YBCO (Yttrium Barium Copper Oxide) super-conducting film and a preparation method. The super-conducting film is prepared by mixing a nano-particle BYNO (Ba2YNbO6) with a double perovskite structure into a YBCO film, wherein an Nb material is 1 to 10% of total quantity of a material of a metal cation. The preparation method comprises the following steps of: preparing a YBCO precursor solution; preparing an Nb precursor solution; preparing an Nb-doped YBCO precursor solution; coating same on a gel film; roasting at a low temperature; and sintering at a high temperature. The preparation method provided by the invention is simple and easy to carry out; a mixture ratio of doped materials can be randomly controlled; and furthermore, raw materials are cheap and easy to obtain, vacuum equipment is not needed, and low cost is ensured; a prepared film has higher critical transition temperature, critical current density and an excellent biaxial texture.

Description

technical field [0001] The invention relates to a YBCO high-temperature superconducting thin film material and a preparation method thereof, and belongs to the technical field of YBCO superconducting thin films. technical background [0002] YBCO coated superconducting material, due to its own series of advantages, has attracted widespread attention in the world once it is discovered, and is considered to be the superconducting material most likely to be applied on a large scale. With the deepening of research, the application of YBCO superconducting materials is also approaching. However, YBCO has a disadvantage, that is, with the increase of the external magnetic field, the critical current density it carries decreases significantly. However, most of the applications of YBCO superconducting materials are under the external magnetic field, so it is really necessary to achieve practical application. It is required to have a high current-carrying capacity under its own field...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B12/06
CPCY02E40/60
Inventor 索红莉毛磊刘敏叶帅徐燕马麟
Owner 深创超导(深圳)科技有限公司
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