A rapid preparation of high-quality fese 0.5 te 0.5 Superconducting polycrystalline method

A fese0.5te0.5, high-quality technology, applied in chemical instruments and methods, selenium/tellurium compounds, inorganic chemistry, etc., to achieve the effects of simplified process flow, convenient preparation process, and shortened process cycle

Active Publication Date: 2017-02-22
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Purpose of the invention: to provide a rapid preparation of high-quality FeSe 0.5 Te 0.5 A superconducting polycrystalline approach to address at least some of the problems of the prior art

Method used

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  • A rapid preparation of high-quality fese <sub>0.5</sub> te <sub>0.5</sub> Superconducting polycrystalline method
  • A rapid preparation of high-quality fese <sub>0.5</sub> te <sub>0.5</sub> Superconducting polycrystalline method
  • A rapid preparation of high-quality fese <sub>0.5</sub> te <sub>0.5</sub> Superconducting polycrystalline method

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Experimental program
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Effect test

Embodiment 1

[0032] Fe powder with a purity of 99.99%, Te lumps with a purity of 99.99%, and Se particles with a purity of 99.99% are prepared in the air at an atomic ratio of 1:0.5:0.5 and put into a quartz tube with one end sealed. middle. Seal the other port of the quartz tube containing the raw material powder with an acetylene welding torch. Put the quartz tube with the raw materials sealed at both ends into a quartz tube with a larger diameter, and seal the two ends. Put the above-mentioned quartz tube with a larger diameter sealed at both ends into a box furnace and sinter at 880 degrees for 3 days. After the box furnace is naturally cooled to room temperature, high-quality FeSe can be obtained. 0.5 Te 0.5 Superconducting polycrystalline.

Embodiment 2

[0034] Fe powder with a purity of 99.99%, Te lumps with a purity of 99.99%, and Se particles with a purity of 99.99% are prepared in the air at an atomic ratio of 1:0.5:0.5 and put into a quartz tube with one end sealed. middle. Seal the other port of the quartz tube containing the raw material powder with an acetylene welding torch. Put the quartz tube with the raw materials sealed at both ends into a quartz tube with a larger diameter, and seal the two ends. Put the above-mentioned quartz tube with a larger diameter sealed at both ends into a box furnace and sinter at a temperature of 880 degrees for 5 days. After the box furnace is naturally cooled to room temperature, high-quality FeSe can be obtained. 0.5 Te 0.5 Superconducting polycrystalline.

Embodiment 3

[0036]Fe powder with a purity of 99.99%, Te lumps with a purity of 99.99%, and Se particles with a purity of 99.99% are prepared in the air at an atomic ratio of 1:0.5:0.5 and put into a quartz tube with one end sealed. middle. Seal the other port of the quartz tube containing the raw material powder with an acetylene welding torch. Put the quartz tube with the raw materials sealed at both ends into a quartz tube with a larger diameter, and seal the two ends. Put the above-mentioned quartz tube with a larger diameter sealed at both ends into a box furnace and sinter at a temperature of 850 degrees for 3 days. After the box furnace is naturally cooled to room temperature, high-quality FeSe can be obtained. 0.5 Te 0.5 Superconducting polycrystalline.

[0037] combine Figure 1 to Figure 4 The superconducting polycrystals obtained in the above examples will be described. Such as figure 1 As shown, FeSe 0.5 Te 0.5 A polycrystalline superconducting phase has formed. figure...

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Abstract

The invention discloses a method for quickly preparing high-quality FeSe0.5Te0.5 superconductive polycrystal. The method is characterized by comprising the following steps: a, blending Fe powder having the purity of 99% to 99.99%, Te block having the purity of 99% to 99.99% and Se particles having the purity of 99% to 99.99% together in an atomic ratio of 1: 0.5: 0.5 in air and putting the mixture in a quartz tube with one end sealed; b, sealing the other end of the quartz tube with the raw material powder by using an acetylene welding gun; c, putting the quartz tube with the raw material and both ends sealed into a larger-aperture quartz tube, and sealing the two ends of the larger-aperture quartz tube; and d, putting the larger-aperture quartz tube with both ends sealed into a box-type furnace for sintering at a temperature ranging from 850 to 880 DEG C for 3-5 days, and naturally cooling the box-type furnace to a room temperature, thereby obtaining the high-quality FeSe0.5Te0.5 superconductive polycrystals.

Description

technical field [0001] The invention belongs to the field of preparation methods of superconducting polycrystals, in particular to a method for rapidly preparing high-quality FeSe 0.5 Te 0.5 Methods for superconducting polycrystals. Background technique [0002] In January 2008, Hidekuma Hosono's group at Tokyo Institute of Technology discovered a new type of iron-based superconductor LaFeAs(O,F) with a superconducting transition temperature of 26K. This breakthrough opened a new round of high-temperature superconductivity in the scientific community. Since then, researchers have successively discovered several new iron-based superconducting systems. Iron-based superconductors have obvious advantages in application, such as: higher upper critical field; higher superconducting critical transition temperature; lower upper critical field anisotropy, etc. These outstanding advantages make the application prospect of iron-based superconductors very promising. Among many iron-...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B19/00
CPCC01B19/00C01P2002/74C01P2004/03C01P2006/40
Inventor 施智祥李雄
Owner SOUTHEAST UNIV
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