Preparation method of rectangular multicore composite superconductive strip

A technology of superconducting strips and composite strips, applied in the usage of superconducting elements, superconducting devices, superconducting/high-conducting conductors, etc., can solve the problems of mechanical system energy difference, quenching, etc., and achieve wide temperature use Range, high C activity, and uniform core wire size

Active Publication Date: 2013-12-11
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But MgB 2 Due to the inherent properties of superconductor powder, its mechanical energy is poor, and quenching phenomenon will occur under very small stress, and its critical current density is greatly affected by magnetic field, so it is necessary to introduce effective pinning centers, while chemical doping Doping is an effective way of doping

Method used

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  • Preparation method of rectangular multicore composite superconductive strip
  • Preparation method of rectangular multicore composite superconductive strip

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Step 1, mixing amorphous boron powder and magnesium powder according to the atomic ratio of Mg:B=1:2, mixing evenly, then adding malic acid ethanol solution to the mixture, stirring at 200r / min for 90min to obtain a mixed slurry; The quality of malic acid in the described malic acid ethanol solution is 10% of the total mass of amorphous boron powder and magnesium powder; the mass percentage concentration of malic acid in the described malic acid ethanol solution is 15%;

[0034] Step 2. Pour the mixed slurry described in step 1 into a petri dish, put it in a vacuum oven, dry it in a vacuum at 50°C, and grind it to obtain a powder; put the powder in a tube furnace, Under protection, the temperature was raised to 180°C at a rate of 0.5°C / min, and then the temperature was kept at a constant temperature for 2 hours for low-temperature decomposition treatment. After cooling with the furnace, it was ground evenly to obtain the tube-filled precursor powder;

[0035] Step 3, pa...

Embodiment 2

[0042] Step 1, mix amorphous boron powder and magnesium powder according to the atomic ratio of Mg:B=1:2, mix evenly, then add malic acid ethanol solution to the mixture, and stir at 400r / min for 30min to obtain a mixed slurry; The quality of malic acid in the described malic acid ethanol solution is 30% of the total mass of amorphous boron powder and magnesium powder; the mass percent concentration of malic acid in the described malic acid ethanol solution is 25%;

[0043] Step 2. Pour the mixed slurry described in step 1 into a petri dish, put it in a vacuum oven, dry it in a vacuum at 60°C, and grind it to obtain a powder; put the powder in a tube furnace, Under protection, the temperature was raised to 200°C at a rate of 1°C / min, and then the temperature was kept at a constant temperature for 1 hour for low-temperature decomposition treatment. After cooling in the furnace, it was ground evenly to obtain the tube-filled precursor powder;

[0044] Step 3, packing the tube-pa...

Embodiment 3

[0051] Step 1, mixing amorphous boron powder and magnesium powder according to the atomic ratio of Mg:B=1:2, mixing evenly, then adding malic acid ethanol solution to the mixture, stirring at 300r / min for 60min, to obtain a mixed slurry; The quality of malic acid in the described malic acid ethanol solution is 20% of the total mass of amorphous boron powder and magnesium powder; the mass percentage concentration of malic acid in the described malic acid ethanol solution is 20%;

[0052]Step 2. Pour the mixed slurry described in step 1 into a petri dish, put it in a vacuum oven, dry it in a vacuum at 55°C, and grind it to obtain a powder; put the powder in a tube furnace, Under protection, the temperature was raised to 200°C at a rate of 1°C / min, and then the temperature was kept at a constant temperature for 1 hour for low-temperature decomposition treatment. After cooling in the furnace, it was ground evenly to obtain the tube-filled precursor powder;

[0053] Step 3, packing...

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Abstract

The invention discloses a preparation method of a rectangular multicore composite superconductive strip. The preparation method comprises the following steps of step one. preparing mixed slurry by using amorphous boron powder, magnesium powder and a malic acid ethanol solution; step two. preparing tubing precursor powder; step three. tubing, carrying out rotary swaging, and drawing, thus obtaining a Cu-Nb-MgB2 single-core rod; step four. placing the Cu-Nb-MgB2 single-core rod and a Cu-NbTi single-core rod in a Cu-Ni alloy tube for secondary packaging, thus obtaining a secondary complex; five. processing the secondary complex into a wire rod, then carrying out rotary swaging and drawing so as to obtain a rectangular multicore composite strip; step six. winding a high-silica glass fiber to form a disk, and clamping the two ends of the disk to be flat; and step seven. carrying out thermal treatment so as to obtain the rectangular multicore composite superconductive strip. Compared with a single MgB2 and NbTi superconducting material, the composite superconductive strip prepared by the method is relatively wide in temperature using range and has relatively high using magnetic field.

Description

technical field [0001] The invention belongs to the technical field of superconducting material preparation, and in particular relates to a method for preparing a rectangular multi-core composite superconducting tape. Background technique [0002] With the "climate warming" of the earth and the deterioration of the human living environment, the development of energy-saving, environmental protection and new energy technologies has become an inevitable choice for human beings in the 21st century; and superconducting materials, as the most important high-tech energy-saving and environmental protection materials in the 21st century, are used in large-scale transportation. It has a wide range of applications in power distribution, super magnets, energy storage, generators, transformers, maglev trains and other fields. [0003] At present, the low-temperature superconductor NbTi alloy is the most widely used superconducting material, which has excellent machinability and supercond...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B13/00H01B12/02
CPCY02E40/60
Inventor 李成山刘国庆庞玉春张华荣熊晓梅杨芳焦高峰王庆阳冯建情闫果冯勇
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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