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Novel double-doped chalcogen superconducting material and preparation method thereof

A superconducting material, double-doped technology, applied in the field of new double-doped chalcogen superconducting materials and their preparation, can solve the problem of low superconducting temperature, and achieve the effect of uniform distribution, large size and compact structure

Pending Publication Date: 2019-05-24
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although important progress has been made in the exploration and research of transition metal dichalcogenide superconducting materials, many problems in this system are still to be solved, such as the superconducting temperature is generally low (the transition temperature of most transition metal layered dichalcogenide superconductors at about 2K), the formation mechanism of charge density waves and the competition relationship between superconductivity, etc.

Method used

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  • Novel double-doped chalcogen superconducting material and preparation method thereof
  • Novel double-doped chalcogen superconducting material and preparation method thereof
  • Novel double-doped chalcogen superconducting material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Accurately weigh 0.0025g Cu, 0.185g Nb, 0.3312g Se, and 0.0013g S and place them in a quartz tube. After fully grinding, evacuate to a vacuum of 1×10 under the vacuum line system. -5 Torr sealed the tube with an acetylene flame; then placed the sealed quartz tube in a muffle furnace at 850°C for four days, and then opened the quartz tube to fully grind the obtained powder to obtain Cu x NbSe 2-y S y (0≤x=y≤0.1) polycrystalline powder; then use X-ray powder diffraction (PXRD) to determine the purity of the respective component powders, feed into the quartz tube according to the polycrystalline powder and iodine elemental mass ratio 20:1, And pumped to a vacuum of 1×10 under the vacuum line system -5 Torr seals the tube with an acetylene flame; put the sealed quartz tube in a tube furnace with two temperature zones at 700°C and 600°C for one week, and slowly cool down to room temperature to obtain the single crystal material of each component ; Finally, the physical pr...

Embodiment 2

[0029] Accurately weigh 0.003g Cu, 0.1108g Nb, 0.1846g Se, and 0.0016g S and place them in a quartz tube. After fully grinding, pump them under the vacuum line system to a vacuum of 1×10 -5 Torr sealed the tube with an acetylene flame; then placed the sealed quartz tube in a muffle furnace at 850°C for four days, and then opened the quartz tube to fully grind the obtained powder to obtain Cu x NbSe 2-y S y (0≤x=y≤0.1) polycrystalline powder; then use X-ray powder diffraction (PXRD) to determine the purity of the respective component powders, feed into the quartz tube according to the polycrystalline powder and iodine elemental mass ratio 20:1, And pumped to a vacuum of 1×10 under the vacuum line system -5Torr seals the tube with an acetylene flame; put the sealed quartz tube in a tube furnace with two temperature zones at 700°C and 600°C for one week, and slowly cool down to room temperature to obtain the single crystal material of each component ; Finally, the physical pro...

Embodiment 3

[0031] Accurately weigh 0.0045g Cu, 0.1107g Nb, 0.1825g Se, and 0.0023g S and place them in a quartz tube. After fully grinding, pump them under the vacuum line system to a vacuum of 1×10 -5 Torr sealed the tube with an acetylene flame; then placed the sealed quartz tube in a muffle furnace at 850°C for four days, and then opened the quartz tube to fully grind the obtained powder to obtain Cu x NbSe 2-y S y (0≤x=y≤0.1) polycrystalline powder: then use X-ray powder diffraction (PXRD) to determine the purity of the respective component powders, then feed into the quartz tube according to the polycrystalline powder and iodine elemental mass ratio of 20:1, And pumped to a vacuum of 1×10 under the vacuum line system -5 Torr seals the tube with an acetylene flame; put the sealed quartz tube in a tube furnace with two temperature zones at 700°C and 600°C for one week, and slowly cool down to room temperature to obtain the single crystal material of each component ; Finally, the ph...

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Abstract

The invention relates to a superconducting material and a preparation method thereof, and belongs to the technical field of functional material manufacturing. The chemical formula of the superconducting material is CuxNbSe2-ySy (0<=x=y<=0.1). The preparation method is a traditional high-temperature solid-phase method. Simple substances Cu, Nb, Se and S in a stoichiometric ratio are fully ground, vacuumized and sealed in a quartz tube, then the quartz tube is vacuumized and sealed at high temperature, finally, the sealed quartz tube containing the raw materials is placed in a furnace to be sintered for four days at 850 DEG C to obtain polycrystalline powder of CuxNbSe2-ySy (0<=x=y<=0.1), then the obtained polycrystalline powder and a simple iodine substance are put into the quartz tube in the mass ratio of 20:1, the tube is placed in a tubular furnace after being vacuumized and sealed to be subjected to heat preservation for seven days, and single crystals of corresponding components are obtained, wherein the tubular furnace is provided with two temperature areas with the temperatures of 700 DEG C and 600 DEG C at the two ends. The physical properties, mainly including conductivity,the magnetic property, the heat capacity and the like, of the superconducting material are tested through a physical property measurement system (PPMS), and finally, it is determined that a target product has superconductivity. The superconducting material is applied to the aspects such as electric power, communication, high-tech equipment and military equipment, and has an indispensable effect and important strategic significance.

Description

technical field [0001] The invention belongs to the technical field of functional material manufacturing, in particular to a chemical composition Cu x NbSe 2-y S y (0≤x=y≤0.1) novel double-doped chalcogen superconducting material and preparation method thereof Background technique [0002] Materials are a symbol of human progress and civilization, a milestone in social development, and have played a huge role in promoting the development of productivity. Looking at every discovery and development of major technologies in history, we can often see the presence of new materials, especially new functional materials. New functional materials refer to new materials that have a positive effect on social progress and the development of the national economy, and have special physical or chemical properties such as optical, electrical, and magnetic properties. Superconducting materials are a new type of functional material with special properties. Material. Superconducting mater...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/46C30B1/02H01B12/00
CPCY02E40/60
Inventor 罗惠霞严冬何缘王舒石磊
Owner SUN YAT SEN UNIV
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