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Iron-based superconducting new material and preparation method thereof

An iron-based superconducting and new material technology, applied in the field of iron-based superconducting new materials and their preparation, can solve the problem of not fully understanding the principles of superconducting materials, and achieve the effects of improving superconductivity and superconducting transition temperature

Inactive Publication Date: 2020-11-27
嘉兴市爵拓科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It is one of the biggest challenges in the field of modern condensed matter physics research. So far, we still cannot fully understand the principles of superconducting materials in terms of basic mechanisms and technical applications

Method used

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  • Iron-based superconducting new material and preparation method thereof
  • Iron-based superconducting new material and preparation method thereof
  • Iron-based superconducting new material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A preparation method of a new iron-based superconducting material, the preparation method comprising:

[0028] (1) Preparation of precursor FeSe

[0029] Weigh iron powder with equimolar purity ≥99.95% and selenium powder with equimolar purity ≥99.99% and grind them in a mortar to mix them evenly, pour them into a quartz tube, and seal them in a vacuum with a degree of 4.6×10 -4 Pa, and then put it into a large quartz tube for vacuum sealing; then put the double-layer sealed quartz tube containing the iron selenium powder raw material into a high temperature furnace for sintering, and the sintering curve is: the heating rate of 2 °C / min is from The room temperature was raised to 1080°C and kept for 65h, then the temperature was lowered to 440°C at a cooling rate of 65°C / h, and the temperature was kept for 92h, then immediately taken out and quenched in ice water to obtain FeSe blocks, which were ground in a pure argon atmosphere , to obtain FeSe powder.

[0030] (2) N...

Embodiment 2

[0033] A preparation method of a new iron-based superconducting material, the preparation method comprising:

[0034] (1) Preparation of precursor FeSe

[0035] Weigh iron powder with equimolar purity ≥99.95% and selenium powder with equimolar purity ≥99.99% and grind them in a mortar to mix them evenly. -4 Pa, and then put it into a large quartz tube for vacuum sealing; then put the double-layer sealed quartz tube with iron selenium powder raw materials into a high-temperature furnace for sintering, and the sintering curve is: the heating rate of 1 °C / min is from The room temperature was raised to 1100°C and kept for 68h, then the temperature was lowered to 430°C at a cooling rate of 70°C / h, kept for 95h, then taken out immediately, quenched in ice water to obtain FeSe blocks, which were ground in a pure argon atmosphere , to obtain FeSe powder.

[0036] (2) New iron-based superconducting material Cs 0.77 Na 0.23 (C 9 H 13 N) 0.18 Fe 2 Se 2 preparation

[0037] 5 pa...

Embodiment 3

[0039] A preparation method of a new iron-based superconducting material, the preparation method comprising:

[0040] (1) Preparation of precursor FeSe

[0041] Weigh iron powder with equimolar purity ≥ 99.95% and selenium powder with purity ≥ 99.99% and grind them in a mortar to mix them evenly, pour them into a quartz tube, and seal with a vacuum of 4.7×10 -4 Pa, and then put it into a large quartz tube for vacuum sealing; then put the double-layered sealed quartz tube filled with iron selenium powder raw materials into a high-temperature furnace for sintering, and the sintering curve is: the heating rate of 3 °C / min is from The room temperature was raised to 1120°C, kept for 70h, then the temperature was lowered to 450°C at a cooling rate of 66°C / h, kept for 93h, then taken out immediately, quenched in ice water to obtain FeSe blocks, which were ground in a pure argon atmosphere , to obtain FeSe powder.

[0042] (2) New iron-based superconducting material Cs 0.77 Na 0.2...

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Abstract

The invention discloses a novel iron-based superconducting material and a preparation method thereof, and belongs to the field of iron-based superconducting materials. The preparation method comprisesthe following steps: preparing FeSe powder from iron powder and selenium powder, putting the FeSe powder, cesium chloride and a sodium citrate solution into a container, then, adding 4-tert-butyl pyridine into a container, fully mixing all the components, sealing, performing ultrasonic treatment, pouring the mixed reaction solution into a reaction kettle, sealing, putting the obtained product into a drying oven, heating, cooling the product to room temperature, grinding the product to obtain Cs0.77Na0.23(C9H13N)0.18Fe2Se2 powder, then putting the powder into the drying oven, performing annealing treatment, and taking out the powder to obtain the Cs0.77Na0.23(C9H13N)0.18 Fe2Se2 iron-based superconducting new material. The iron-based superconducting new material has a relatively high superconducting transition temperature.

Description

technical field [0001] The invention belongs to the field of iron-based superconducting materials, in particular to a new iron-based superconducting material and a preparation method thereof. Background technique [0002] In modern energy technology, superconducting materials are becoming increasingly important because of their ability to significantly increase the efficiency of many facilities and enable lossless current transfer. It is one of the biggest challenges in the field of modern condensed matter physics research. So far, we have not fully understood the principles of superconducting materials in both fundamental mechanisms and technical applications. We call the temperature at which the resistance of the superconductor suddenly drops to zero as the critical temperature T C , the magnetic field that destroys the superconducting state of the superconductor and turns it into a normal state is called the critical magnetic field H C , when the current through the sup...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B12/00C07D213/16C01B19/00
CPCC01B19/007C01P2002/72C01P2002/77C01P2006/42C07B2200/13C07D213/16H01B12/00Y02E40/60
Inventor 不公告发明人
Owner 嘉兴市爵拓科技有限公司
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