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Method for preparing FeSe superconductive film

A superconducting film and plate technology, which is applied in the manufacture/processing of superconductor devices, cable/conductor manufacturing, gaseous chemical plating, etc., can solve the problems of increasing the cost of material preparation, achieve strong repeatability, save equipment costs, The effect of shortening the process flow

Active Publication Date: 2012-12-19
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the existing thin film preparation technologies are physical deposition methods, which require the use of high-energy devices such as lasers, which greatly increases the cost of material preparation

Method used

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  • Method for preparing FeSe superconductive film
  • Method for preparing FeSe superconductive film
  • Method for preparing FeSe superconductive film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The preparation method of the FeSe superconducting thin film of the present embodiment comprises the following steps:

[0028] Step 1. Cut the DT4 pure iron strip (quality purity 99.9%) with a size of 4.0mm (width) × 0.05mm (thickness) to a size of 4.0mm (length) × 4.0 mm (width) × 0.05mm (thickness) flat DT4 pure iron plate, cleaned with hydrochloric acid solution with a mass percentage concentration of 10%, absolute ethanol and acetone in sequence, and placed in the KTL1600 produced by Hefei Kejing Material Technology Co., Ltd. The middle part of the high temperature tube furnace;

[0029] Step 2. Place the quartz crucible containing selenium powder (analytical pure) on the end of the high-temperature tube furnace close to the air inlet, and keep the center distance between the crucible and the pure iron plate at 10cm;

[0030] Step 3: Introduce argon gas into the high-temperature tube furnace, firstly inflow argon gas for 2 hours at a flow rate of 20L / h to remove th...

Embodiment 2

[0034] The preparation method of the FeSe superconducting thin film of the present embodiment comprises the following steps:

[0035] Step 1. The DT4 pure iron strip (mass purity: 99.8%) with a size of 10mm (width) × 0.1mm (thickness) is cut to length and rolled to obtain a size of 10mm (length) × 10mm ( Width) × 0.1mm (thickness) flat DT4 pure iron plate, after cleaning with hydrochloric acid solution with a concentration of 8% by mass percentage, absolute ethanol and acetone, place it on the KTL1600 high-temperature plate produced by Hefei Kejing Material Technology Co., Ltd. the middle of the tube furnace;

[0036] Step 2. Place the silicon carbide crucible containing selenium powder (analytical pure) at the end of the high-temperature tube furnace close to the air inlet, and keep the center distance between the crucible and the pure iron plate at 15cm;

[0037] Step 3: Introduce argon gas into the high temperature tube furnace, firstly inflow argon gas for 1 hour at a flo...

Embodiment 3

[0041] The preparation method of the FeSe superconducting thin film of the present embodiment comprises the following steps:

[0042] Step 1. Cut the DT1 pure iron strip (quality purity 99.5%) with a size of 10mm (width) × 0.5mm (thickness) to a size of 10mm (length) × 10mm (width) after cutting to length and flattening. ) × 0.5mm (thick) flat DT1 pure iron plate, after cleaning with hydrochloric acid solution with a mass percentage concentration of 20%, absolute ethanol and acetone in sequence, place it in the KTL1600 high temperature tube produced by Hefei Kejing Material Technology Co., Ltd. the middle of the furnace;

[0043] Step 2. Place the quartz crucible containing selenium powder (analytical pure) on the end of the high-temperature tube furnace near the air inlet, and keep the center distance between the crucible and the pure iron plate at 30cm;

[0044] Step 3: Introduce argon gas into the high temperature tube furnace, firstly inflow argon gas for 3 hours at a flo...

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Abstract

The invention provides a method for preparing a FeSe superconductive film, which comprises the following steps: flattening the surface of the steel sheet material and cleaning, and placing in the central part of a high temperature tubular furnace; 2) placing a selenium powder at one end of the tubular furnace close to an air intake; 3) introducing argon in the high temperature tubular furnace for removing air in the furnace, then adjusting the argon flow and heating, evaporating the selenium powder to a gas phase Se, realizing the transportation of gas phase Se with the flow of argon and depositing the gas phase Se on the surface of the steel sheet material; 4) removing the selenium powder, annealing on the steel sheet material and finally acquiring the FeSe superconductive film. The method for preparing the FeSe superconductive film has the advantages of simple and easy control of preparation technology and short process flow, strong repeatability, and is adapted to large scale industrial production; and the prepared FeSe superconductive film has the advantages of flat surface, good intercrystalline connectivity, high content of tetragonal phase and excellent superconductive performance.

Description

technical field [0001] The invention relates to a preparation method of a superconducting material, in particular to a preparation method of a FeSe superconducting thin film. Background technique [0002] In 2008, LaO with a critical temperature of 26K was first reported by the Japanese Hosono research group. 1-x f x FeAs, followed by Fe-based high-temperature superconducting materials (FHS) developed rapidly. At present, four main systems have been developed, namely "1111" system (such as LaFeAsOF), "122" system (such as BaFe2As2), "111" system (such as LiFeAs) and "11" system (such as FeSe). Similar to the high-temperature copper oxide superconductor (HTS), the crystal structure of FHS is a layered structure, with -FeAs-layer (or -FeSe-layer) as the superconducting layer. [0003] There are three main reasons for the rapid development of FHS. First, it is generally believed that the magnetism of Fe can destroy the electron pairing in conventional superconductors. Theref...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C16/30C23C16/448C23C16/52H01L39/24H01B13/00H10N60/01
Inventor 张胜楠李成山白利锋
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH