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

A kind of preparation method of bi‑2212 superconducting wire/tape

A bi-2212, superconducting wire technology, applied in the usage of superconducting elements, superconducting/high-conducting conductors, superconducting devices, etc., can solve the problems affecting the current-carrying performance of Bi-2212 wires/strips, ceramic powder in the center of wires Problems such as poor processing performance and broken core processing of multi-core wires can prevent poor processing uniformity, low manufacturing cost, and improve processing performance.

Active Publication Date: 2017-07-07
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The poor processability of the ceramic powder in the center of the wire is one of the important reasons for the unevenness of the silver superinterface
Because the plasticity of the sheath material is good, the fluidity of the ceramic powder is poor, and the non-cooperative deformation of the two materials during the drawing process results in poor smoothness of the silver superinterface. At the same time, problems such as broken cores of multi-core wires will also occur. , affecting the current-carrying performance of Bi-2212 wire / strip

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

[0022] The Bi-2212 superconducting wire / tape prepared in this embodiment is specifically a Bi-2212 superconducting wire, and the preparation method of the Bi-2212 superconducting wire includes the following steps:

[0023] Step 1. Place the Bi-2212 precursor powder in the heat treatment furnace, and then pass argon gas into the heat treatment furnace to remove the air in the furnace;

[0024] Step 2. Put the Bi-2212 precursor powder placed in the heat treatment furnace that has excluded the air in step 1. Under the protection of argon atmosphere, under the condition of oxygen partial pressure ≤ 50ppm, the temperature is raised to 400°C at a heating rate of 50°C / h and then kept. 3h, after cooling to room temperature of 25°C with the furnace, the pretreated Bi-2212 precursor powder is obtained; the superconducting transition temperature of the pretreated Bi-2212 precursor powder is not greater than 85K;

[0025] Step 3: Put the Bi-2212 precursor powder pretreated in step 2 into ...

Embodiment 2

[0031] The Bi-2212 superconducting wire / tape prepared in this embodiment is specifically a Bi-2212 superconducting wire, and the preparation method of the Bi-2212 superconducting wire includes the following steps:

[0032] Step 1. Place the Bi-2212 precursor powder in the heat treatment furnace, and then pass argon gas into the heat treatment furnace to remove the air in the furnace;

[0033] Step 2. Put the Bi-2212 precursor powder placed in the heat treatment furnace that has excluded the air in step 1. Under the protection of argon atmosphere, under the condition of oxygen partial pressure ≤ 50ppm, the temperature is raised to 500°C at a heating rate of 100°C / h and then kept. 2h, after cooling to room temperature of 25°C with the furnace, the pretreated Bi-2212 precursor powder is obtained; the superconducting transition temperature of the pretreated Bi-2212 precursor powder is not greater than 85K;

[0034]Step 3: Put the Bi-2212 precursor powder pretreated in step 2 into ...

Embodiment 3

[0040] The Bi-2212 superconducting wire / tape prepared in this embodiment is specifically a Bi-2212 superconducting wire, and the preparation method of the Bi-2212 superconducting wire includes the following steps:

[0041] Step 1. Place the Bi-2212 precursor powder in the heat treatment furnace, and then pass argon gas into the heat treatment furnace to remove the air in the furnace;

[0042] Step 2. Put the Bi-2212 precursor powder placed in the heat treatment furnace that has excluded the air in step 1. Under the protection of argon atmosphere, the oxygen partial pressure is ≤50ppm, and the temperature is raised to 450°C at a heating rate of 80°C / h and then kept. After 2.5 hours, the pretreated Bi-2212 precursor powder was obtained after cooling to room temperature of 25°C with the furnace; the superconducting transition temperature of the pretreated Bi-2212 precursor powder was not greater than 85K;

[0043] Step 3: Put the Bi-2212 precursor powder pretreated in step 2 into...

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
densityaaaaaaaaaa
Login to View More

Abstract

The invention provides a preparation method of a Bi-2212 superconducting wire / strip. The method comprises the following steps that 1) Bi-2212 precursor powder is placed in a heat treatment furnace to remove air; 2) the Bi-2212 precursor powder is pretreated; 3) the Bi-2212 precursor powder is filled into a hydraulic tube in a vibration manner; 4) isostatic pressing molding is carried out to obtain a rod base, the rod base is mounted in a silver tube, the two ends of the silver tube are sealed, and a Bi-2212 single-core complex is obtained; 5) bundle-drawing is carried out on prepared single-core wires to obtain a Bi-2212 multi-core wire; and 6) heat treatment is carried out to obtain the Bi-2212 superconducting wire, or heat treatment is carried out after rolling to obtain the Bi-2212 superconducting strip. According to the invention ,the problem that a silver super interface is unsmooth and low in processing uniformity in the processing process can be solved effectively, and the current carrying performance of the Bi-2212 superconducting wire / strip is improved substantially.

Description

technical field [0001] The invention belongs to the technical field of high-temperature superconducting wire preparation, and in particular relates to a preparation method of Bi-2212 superconducting wire / strip. Background technique [0002] Bi-2212 high temperature superconductor (Bi 2 Sr 2 CaCu 2 o x ) is the most important branch of high-temperature superconducting materials. Due to its easy processing and high current-carrying performance, Bi-2212 wire has become one of the most promising high-temperature superconducting materials. [0003] At present, the powder-in-tube method (PIT) is the mainstream technology for preparing high-performance Bi-2212 high-temperature superconducting wires. The technology is to put the superconducting precursor powder into the silver tube, prepare a multi-core composite by drawing and assembling, and then process it to the designed wire / strip size, and then perform heat treatment to obtain the Bi-2212 superconductor with certain proper...

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 Patents(China)
IPC IPC(8): H01B13/00H01B12/02
CPCH01B12/02H01B13/00Y02E40/60
Inventor 郝清滨李成山徐晓燕刘国庆焦高峰郑会玲张胜楠马小波李高山熊晓梅冯建情张平祥
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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