Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for preparing iron-based superconductor

A superconductor and iron wire technology, applied in the field of preparation of iron-based superconductors, can solve problems such as low critical current density, and achieve the effect of being suitable for large-scale production and simple equipment

Inactive Publication Date: 2011-06-01
INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
View PDF4 Cites 25 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The superconductors prepared by this method often have other impurity phases, and the critical current density is very low

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Put the cleaned iron wire into the reaction chamber of the controlled atmosphere heating furnace, then put the Se powder into the reaction chamber, and clean the reaction chamber 3 times with high-purity argon gas. Close the reaction chamber, raise the temperature to 700°C, and keep it warm for 0.1 hour; then raise the temperature to 800°C, keep it warm for 1 hour; cool down to 400°C, keep it warm at this temperature for 1 hour, turn off the power of the heat treatment furnace, and let the sample cool with the heat treatment furnace to room temperature, the iron-based superconductor of the present invention is produced. The critical magnetization current of the sample is measured by a comprehensive physical property measurement system (PPMS-9, manufactured by Qunatum Design, USA), and the critical magnetization current density of the iron-based superconductor prepared in this embodiment is 16800A / cm 2 (4.2K, 0T), the irreversible field is greater than 9T (4.2K).

Embodiment 2

[0017] Put the cleaned iron belt into the reaction chamber of the controlled atmosphere heating furnace, then put the Se block into the reaction chamber, and clean the reaction chamber 3 times with high-purity argon gas. Close the reaction chamber, raise the temperature to 700°C, and keep it warm for 4 hours; then raise the temperature to 800°C, keep it warm for 8 hours; cool down to 400°C, keep it warm at this temperature for 4 hours, turn off the power of the heat treatment furnace, and let the sample cool with the heat treatment furnace to room temperature, the iron-based superconductor of the present invention is produced. The critical magnetization current of the sample is measured by a comprehensive physical property measurement system (PPMS-9, manufactured by Qunatum Design, USA), and the critical magnetization current density of the superconductor prepared in this embodiment is 12000A / cm 2 (4.2K, 0T), the irreversible field is greater than 9T (4.2K).

Embodiment 3

[0019] Put the cleaned iron belt into the reaction chamber of the controlled atmosphere heating furnace, then put the Se powder into the reaction chamber, and clean the reaction chamber once with high-purity hydrogen. Close the reaction chamber, raise the temperature to 450°C, and keep it warm for 10 hours; then raise the temperature to 800°C, keep it warm for 20 hours; cool down to 400°C, keep it at this temperature for 24 hours, turn off the power of the heat treatment furnace, and let the sample cool with the heat treatment furnace to room temperature, the iron-based superconductor of the present invention is produced. The superconducting performance of the sample is measured by a comprehensive physical property measurement system (PPMS-9, manufactured by QunatumDesign Company of the United States), and the magnetization critical current density of the superconductor prepared in this embodiment is greater than 10000A / cm 2 (4.2K, 0T).

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
current densityaaaaaaaaaa
current densityaaaaaaaaaa
current densityaaaaaaaaaa
Login to View More

Abstract

The invention relates to a method for preparing an iron-based superconductor, which comprises the following steps of: firstly, charging an iron wire or a metal strip after cleaning into a reaction chamber of a controllable atmosphere heating furnace; secondly, charging Se (Selenium) powder or Se blocks into the reaction chamber, cleaning the reaction chamber for 1 to 5 times by using high-purity argon gas or hydrogen gas, sealing the reaction chamber, raising the temperature to 200-700 DEG C, and holding the temperature for 5 minutes to 10 hours; thirdly, raising the temperature to 800-1,000 DEG C, and holding the temperature for 1 to 20 hours; fourthly, reducing the temperature to 500-200 DEG C, and holding the temperature for 1 to 24 hours; and fourthly, cutting off a heating power supply, cooling to the room temperature, and obtaining the FeSe (Ferrum-Selenium) superconductor.

Description

technical field [0001] The invention belongs to a method for preparing a superconducting material, in particular to a method for preparing an iron-based superconductor. Background technique [0002] At the beginning of January 2008, the H. Hosono research group of Tokyo Institute of Technology reported on the JASC magazine the LaO 1-x f x Research on FeAs materials, and found that the material exhibits superconductivity at a temperature of 26K. This breakthrough has opened up a new round of research on high-temperature superconductivity in the scientific community [Kamihara Y.et al., Iron-based layered superconductorLaO 1-x f x FeAs(x=0.05-0.12) with T c =26 K.J.Am.Chem.Sco.130, 3296-3297 (2008)]. At present, according to the composition ratio and crystal structure of the parent compound, the new iron-based superconducting materials can be roughly divided into the following four systems: (1) "1111" system, members include LnOFePn (Ln=La, Ce, Pr, Nd, Sm , Gd, Tb, Dy, Ho,...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H01B13/00H01B12/00
CPCY02E40/64Y02E40/60
Inventor 高召顺马衍伟齐彦鹏王雷王栋梁张现平姚超王春雷
Owner INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com