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Novel quasi-two-dimensional selenium-doped tellurium-containing superconducting material and preparation method thereof

A superconducting material and a new technology, applied in selenium/tellurium compounds, superconducting magnets/coils, chemical instruments and methods, etc., can solve the problem of low superconducting temperature

Pending Publication Date: 2021-09-10
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, transition metal sulfide superconducting materials have not yet been perfected, and the specific mechanism of the competition relationship between the formation mechanism of charge density waves and superconductivity has not yet formed a systematic theory, and the superconducting temperature of this system is generally low

Method used

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  • Novel quasi-two-dimensional selenium-doped tellurium-containing superconducting material and preparation method thereof
  • Novel quasi-two-dimensional selenium-doped tellurium-containing superconducting material and preparation method thereof
  • Novel quasi-two-dimensional selenium-doped tellurium-containing superconducting material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Accurately weigh 0.0066g Cu, 0.0398g Ir, 0.0528g Te and 0.0008g Se raw materials, place them in a quartz tube after fully grinding, and pump the quartz tube containing the fully ground raw materials to a vacuum degree of 1×10 -5 Torr, and seal the tube with an acetylene flame; then place the sealed quartz tube in a box furnace at 850°C for 120 hours of calcination, then open the quartz tube, fully grind the obtained powder and press it into tablets; Put it in the quartz tube again, and evacuate the quartz tube to a vacuum of 1×10 -5 Torr, and seal the tube with an acetylene flame; then place the sealed quartz tube in a box furnace at 850 ° C for 240 h to obtain CuIr 2 Te 3.9 Se 0.1 Sample; then use X-ray powder diffraction (PXRD) to determine the purity of the sample; finally, the physical properties of the obtained polycrystalline sample material will be tested by a physical testing system (PPMS): mainly including electrical conductivity, magnetic properties, heat ca...

Embodiment 2

[0031] Accurately weigh 0.0066g Cu, 0.0400g Ir, 0.0518g Te and 0.0016g Se raw materials, place them in a quartz tube after fully grinding, and pump the quartz tube containing the fully ground raw materials to a vacuum degree of 1×10 -5 Torr, and seal the tube with an acetylene flame; then place the sealed quartz tube in a box furnace at 850°C for 120 hours of calcination, then open the quartz tube, fully grind the obtained powder and press it into tablets; Put it in the quartz tube again, and evacuate the quartz tube to a vacuum of 1×10 - 5 Torr, and seal the tube with an acetylene flame; then place the sealed quartz tube in a box furnace at 850 ° C for 240 h to obtain CuIr 2 Te 3.8 Se 0.2 Sample; then use X-ray powder diffraction (PXRD) to determine the purity of the sample; finally, the physical properties of the obtained polycrystalline sample material will be tested by a physical testing system (PPMS): mainly including electrical conductivity, magnetic properties, heat ...

Embodiment 3

[0033] Accurately weigh 0.0068g Cu, 0.0412g Ir, 0.0452g Te and 0.0068g Se raw materials, place them in a quartz tube after fully grinding, and pump the quartz tube containing the fully ground raw materials to a vacuum degree of 1×10 -5 Torr, and seal the tube with an acetylene flame; then place the sealed quartz tube in a box furnace at 850°C for 120 hours of calcination, then open the quartz tube, fully grind the obtained powder and press it into tablets; Put it in the quartz tube again, and evacuate the quartz tube to a vacuum of 1×10 - 5 Torr, and seal the tube with an acetylene flame; then place the sealed quartz tube in a box furnace at 850 ° C for 240 h to obtain CuIr 2 Te 3.5 Se 0.5 Sample; then use X-ray powder diffraction (PXRD) to determine the purity of the sample; finally, the physical properties of the obtained polycrystalline sample material will be tested by a physical testing system (PPMS): mainly including electrical conductivity, magnetic properties, heat ...

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Abstract

The invention relates to a novel quasi-two-dimensional selenium-doped tellurium-containing superconducting material and a preparation method thereof, and belongs to the technical field of functional material manufacturing, wherein the chemical general formula of the novel quasi-two-dimensional selenium doped tellurium-containing superconducting material is CuIr2Te4-xSex (x is greater than or equal to 0.0 and less than or equal to 0.5). According to the invention, a traditional high-temperature solid phase method is used, high-purity Cu, Ir, Te and Se powder (the purity is larger than or equal to 99.9%) with corresponding stoichiometric ratios are fully ground and then placed in a quartz tube, then vacuumizing and sealing are conducted, the sealed quartz tube containing raw materials is placed in a furnace, sintering is conducted for 120 h at a temperature of 850 DEG C to obtain CuIr2Te4-xSex (x is larger than or equal to 0.0 and smaller than or equal to 0.5) polycrystalline powder, the polycrystalline powder is tabletted after complete grinding, a flaky sample is placed into a vacuum sealed quartz tube, and sintering is performed at 850 DEG C for 240 hours to obtain a flaky CuIr2Te4-xSex (x is greater than or equal to 0.0 and less than or equal to 0.5) sample; and a comprehensive physical performance test system (PPMS) is used, and low-temperature performance of physical properties such as conductivity, magnetic property, specific heat capacity and the like of a sample is measured to finally determine that the target product has superconductivity.

Description

technical field [0001] The invention belongs to the technical field of functional material manufacturing, in particular to a series of 2 Te 4-x Se x (0.0≤x≤0.5) novel Se-doped telluride-containing superconducting material and a preparation method thereof. Background technique [0002] A superconducting material is a special material that exhibits superconducting properties at a critical temperature. Materials in a superconducting state not only have the ideal characteristic of zero resistance, but also have the unique properties of complete diamagnetism and magnetic flux quantization. With this characteristic, the application prospects of superconducting materials are very broad, and they can shine in fields such as energy transmission, long-distance transportation, special equipment, and high-energy physics. [0003] In 1908, Onness successfully liquefied helium, and obtained a low temperature environment of 1.5K through liquid helium throttling expansion technology, and...

Claims

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Application Information

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IPC IPC(8): C01B19/00H01F6/00H01F6/02
CPCC01B19/002H01F6/00H01F6/02C01P2002/72C01P2002/80C01P2006/40C01P2006/42
Inventor 罗惠霞何溢懿佳玛曾令勇王晓鹏黄彦昊
Owner SUN YAT SEN UNIV
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