Multi-element rare earth eutectic high-temperature superconducting raw material as well as preparation method and application thereof

A technology of high-temperature superconductivity and raw materials, applied in the preparation of aldehyde/ketone chelates, metal material coating technology, organic chemistry, etc., can solve problems such as failure to meet market demand, poor particle distribution, unevenness, etc., and achieve improvement Thin-film superconductivity, large steric hindrance, and high production efficiency

Pending Publication Date: 2022-04-22
EASTERN SUPERCONDUCTOR SCI & TECH SUZHOU CO LTD
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Do Ba(thd) at home and abroad 2 、Y(thd) 3 、Cu(thd) 3 、Gd(thd) 3 、Sm(thd) 3 、Dy(thd) 3 There are many chemical sources such as single crystals, but the samples have uneven quality problems such as "poor particle distribution, low purity, high cost, and poor stability", which cannot meet market demand.

Method used

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  • Multi-element rare earth eutectic high-temperature superconducting raw material as well as preparation method and application thereof
  • Multi-element rare earth eutectic high-temperature superconducting raw material as well as preparation method and application thereof
  • Multi-element rare earth eutectic high-temperature superconducting raw material as well as preparation method and application thereof

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preparation example Construction

[0039] The invention provides a method for preparing a multi-component rare earth eutectic high-temperature superconducting raw material, which comprises the following steps:

[0040] 1), preparation of rare earth nitrate solution: with chemical formula Y a Gd b Dy c SM d Prepare the nitrate solution containing Y, Gd, Sm, and Dy respectively, and mix the four kinds of rare earth nitrate solutions, stir for 1-2 hours, filter and let stand for use; among them, a, b, The ratio of c and d is (0.31~0.53):(0.35~0.46):(0.09~0.23):(0.05~0.12);

[0041] 2), (Y a Gd b Dy c SM d )(tmhd) 3 Synthesis: Add a certain amount of TMHD to CH 3 OH and H 2 In the mixed solution of O, and the mass ratio of the two is 0.1-0.2:1, heat the mixed solution to 65-80°C; after the mixed solution is clarified, drop 3-8% sodium hydroxide solution into it to adjust The pH value of the solution is set to be 6.5-7.5, and stirred for 1-2 hours to obtain a TMHD solution; slowly add the above-mentioned ...

Embodiment 1

[0050] a. Rare earth nitrate solution preparation: with chemical formula Y 0.42 Gd 0.38 Dy 0.13 SM 0.07 Prepare the nitrate solution containing Y, Gd, Sm, and Dy respectively in the molar content ratio of each element, and mix the four kinds of rare earth nitric acid solutions, stir for 2h, filter and stand for use;

[0051] b.(Y 0.42 Gd 0.38 Dy 0.13 SM 0.07 )(tmhd) 3 Synthesis: add a certain amount of TMHD to CH 3 OH and H 2 In the mixed solution of O, and the mass ratio of the two is 0.1:1, heat the mixed solution to 65°C; after the mixed solution is clarified, drop 5% sodium hydroxide solution into it, and adjust the pH value of the solution to 6.5 , stirred for 1 h; the above-mentioned nitrate solution containing Y, Gd, Sm, and Dy was slowly added to the TMHD solution, kept stirring for 3 h, then stopped heating, a light yellow precipitate appeared in the reaction kettle, left standing for 3 h, and the solid-liquid was separated; Then, the solid matter was vacuum...

Embodiment 2

[0054] A kind of preparation method of multi-element rare earth eutectic high-temperature superconducting raw material is provided below, and it comprises the following steps: press YBa 2 Cu 3 o 7-d In the formula, the mol ratio of Y:Ba:Cu=1:2:3 calculates the quality of each corresponding M0 source, then Y (tmhd) 3 、Ba(tmhd) 2 、Cu(tmhd) 2 Add 4250ml of tetrahydrofuran, stir and filter evenly, make a superconducting thin film on M1, after silver plating and annealing, test the critical current as Figure 4 shown.

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Abstract

The invention discloses a preparation method of a multi-element rare earth eutectic high-temperature superconducting raw material, which is characterized in that a unit rare earth chemical source is replaced by a multi-element rare earth eutectic chemical source to change the superconducting performance of the multi-element rare earth eutectic high-temperature superconducting raw material, a barium source and a copper source which are matched with the multi-element rare earth eutectic high-temperature superconducting raw material are utilized, and an MOCVD (Metal Organic Chemical Vapor Deposition) growth method which is high in deposition speed, large in deposition area and high in film quality is utilized; and a kilometer high-temperature superconducting long tape is produced, and the excellent superconducting performance of the tape under practical temperature and magnetic field is ensured.

Description

technical field [0001] The invention relates to the field of superconducting materials, more specifically, it relates to a multi-element rare earth eutectic high-temperature superconducting raw material and its preparation method and application. Background technique [0002] In 1987, M K Wu and others discovered YBa 2 Cu 3 o 7-d (YBCO, d is between 0 and 1), Tc is 92K, since the temperature of liquid nitrogen is 77K higher than that of liquid nitrogen, superconducting materials rely on the three functions of "super-conductivity, complete diamagnetism and Josephson effect". , supercomputing and other fields show great potential. [0003] In the preparation method of Super Power MOCVD+IBAD high-temperature superconducting wire, metal-organic sources (MOsources) are the main raw materials for the preparation of REBCO thin films by MOCVD process, and are also the key factors affecting the quality and performance of REBCO thin films. [0004] The core of the second-generatio...

Claims

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Application Information

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IPC IPC(8): C07C45/77C07C49/12C23C16/40
CPCC07C45/77C23C16/408C07C49/12
Inventor 田玉伟程鹏迮建军古宏伟蔡渊张全有周彬杨坤
Owner EASTERN SUPERCONDUCTOR SCI & TECH SUZHOU CO LTD
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