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A kind of preparation method of fe(se,te) superconducting wire

A technology of superconducting wire rod and mixed powder, which is applied in the usage of superconducting elements, superconducting devices, superconducting/high-conducting conductors, etc. Simple and effective low effect

Active Publication Date: 2022-08-02
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But for wire and strip, it is difficult for oxygen to enter the inside of the sheath during post-treatment in a low-oxygen atmosphere, which greatly limits the effect of annealing under oxygen.

Method used

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  • A kind of preparation method of fe(se,te) superconducting wire
  • A kind of preparation method of fe(se,te) superconducting wire
  • A kind of preparation method of fe(se,te) superconducting wire

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] This embodiment includes the following steps:

[0041] Step 1. In a glove box filled with argon, place the mixed powder in an agate mortar and grind for 30 minutes; the mixed powder is composed of iron powder, selenium powder, tellurium powder, silver powder and selenium dioxide powder according to 1.0:0.5 : 0.5:0.05:0.05 molar ratio composition;

[0042] The iron powder is reduced iron powder, and the mass purity is 99.99%, the mass purity of the selenium powder, the tellurium powder and the silver powder are all 99.99%, and the mass purity of the selenium dioxide powder is 99.9%;

[0043] Step 2. In a glove box filled with argon gas, put the mixed powder after grinding in step 1 into a tableting die and seal it, then take it out and place it on a tableting machine for compression treatment to obtain doped Fe- Se-Te green body; the pressure of the pressing treatment is 10MPa, and the time is 10min;

[0044] Step 3: The doped Fe-Se-Te body obtained in step 2 is taken ...

Embodiment 2

[0057] This embodiment includes the following steps:

[0058] Step 1. In a glove box filled with argon, place the mixed powder in an agate mortar and grind for 30 minutes; the mixed powder is composed of iron powder, selenium powder, tellurium powder, silver powder and selenium dioxide powder according to 1.0:0.5 : 0.5:0.01:0.01 molar ratio composition;

[0059] The iron powder is reduced iron powder, and the mass purity is 99.99%, the mass purity of the selenium powder, the tellurium powder and the silver powder are all 99.99%, and the mass purity of the selenium dioxide powder is 99.9%;

[0060]Step 2. In a glove box filled with argon gas, put the mixed powder after grinding in step 1 into a tableting die and seal it, then take it out and place it on a tableting machine for compression treatment to obtain doped Fe- Se-Te green body; the pressure of the pressing treatment is 10MPa, and the time is 10min;

[0061] Step 3: The doped Fe-Se-Te body obtained in step 2 is taken o...

Embodiment 3

[0071] This embodiment includes the following steps:

[0072] Step 1. In a glove box filled with argon, the mixed powder is placed in an agate mortar and ground for 60 minutes; the mixed powder is composed of iron powder, selenium powder, tellurium powder, silver powder and selenium dioxide powder according to 0.9:0.2 : 0.2:0.01:0.01 molar ratio composition;

[0073] The iron powder is reduced iron powder, and the mass purity is 99.999%, the mass purity of the selenium powder, the tellurium powder and the silver powder are all 99.999%, and the mass purity of the selenium dioxide powder is 99.99%;

[0074] Step 2. In a glove box filled with argon gas, put the mixed powder after grinding in step 1 into a tableting die and seal it, then take it out and place it on a tableting machine for compression treatment to obtain doped Fe- Se-Te green body; the pressure of the pressing treatment is 5MPa, and the time is 2min;

[0075] Step 3: The doped Fe-Se-Te body obtained in step 2 is ...

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Abstract

The invention discloses a preparation method of Fe(Se,Te) superconducting wire. The method comprises: first, grinding iron powder, selenium powder, tellurium powder, silver powder and selenium dioxide powder; The Fe-Se-Te green body after being doped; 3. sintering the Fe-Se-Te green body after doping to obtain Fe(Se, Te) superconducting material block; 4. Fe(Se, Te) obtained by high-energy ball milling Superconducting powder; 5. Fe (Se, Te) superconducting wire rod is obtained by sintering the Fe (Se, Te) superconducting powder after filling the tube. The invention adopts the chemical co-doping method to form silver-oxygen co-doping in the raw material powder, enhances the connectivity of Fe (Se, Te) grain boundaries through silver elements, and reduces the amount of particles in the Fe (Se, Te) lattice by combining oxygen elements. The content of interstitial iron can synergistically improve the superconducting properties of Fe(Se,Te) superconducting wires, and solve the two major problems of grain boundary connectivity and interstitial iron in FeSe-based superconducting wires.

Description

technical field [0001] The invention belongs to the field of superconducting material preparation, in particular to a preparation method of Fe(Se,Te) superconducting wire. Background technique [0002] LaO with a critical temperature of 26K was first reported in 2008 by Hosono's group in Japan 1-x F x FeAs iron-based superconducting materials, opened the prelude to the research of iron-based superconducting materials. At present, four main systems have been developed, namely "1111" system (such as LaFeAsOF), "122" system (such as BaFe 2 As 2 ), "111" systems (eg LiFeAs) and "11" systems (eg FeSe). Similar to the copper oxide high temperature superconductor, the crystal structure of the iron-based superconductor is a layered structure, and the -FeAs-layer or -FeSe-layer is used as the superconducting layer. [0003] There are three main reasons for the rapid development of iron-based superconductors: First, it is generally believed that the magnetic properties of Fe have...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B12/00
CPCH01B12/00Y02E40/60
Inventor 刘吉星邵柏淘张胜楠冯建情李成山
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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