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A kind of preparation method of bi‑2223 superconducting tape

A technology of bi-2223 and superconducting tape, applied in the usage of superconducting elements, superconducting devices, cable/conductor manufacturing, etc., can solve the problem that the performance of Bi-2223 tape is difficult to further improve and the critical current of the tape drops , poor superconducting grain texture, etc., to achieve the effect of increasing the engineering critical current density, improving the weak connection behavior, and increasing the rolling density

Active Publication Date: 2017-12-26
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the included angle between Bi-2223 superconducting grains is greater than 3°, weak connections between grains will be formed, and it is difficult for superconducting current to pass through these weak connections, resulting in a decrease in the critical current of the strip.
The superconducting grain texture of the tape prepared by conventional processing methods is poor, especially the Bi-2223 superconducting grain texture far away from the silver layer is even worse, making it difficult to further improve the performance of the Bi-2223 tape

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Bi-2223

[0025] The preparation method of the present embodiment Bi-2223 superconducting tape comprises the following steps:

[0026] Step 1: Fill the Bi-2223 precursor powder into a hydraulic tube with one end sealed by vibrating the tube until the filling density of the Bi-2223 precursor powder in the hydraulic tube is 1.9g / cm 3 ; The superconducting transition temperature of the Bi-2223 precursor powder is not more than 85K; The specific process of the vibration tube installation is: place the vibrating table, silver sheath and metal funnel in a glove box full of oxygen, and place the silver The bag is installed on the vibrating table, the metal funnel is fixed on the silver bag and the lower end of the metal funnel is located in the silver bag, then the Bi-2223 precursor powder is poured into the metal funnel, and the vibration table is started at the same time to adjust the hydraulic pressure. The tube is vibrated so that the Bi-2223 precursor powder is loaded into the vibrating h...

Embodiment 2

[0034] The preparation method of the present embodiment Bi-2223 superconducting tape comprises the following steps:

[0035] Step 1: Fill the Bi-2223 precursor powder into a hydraulic tube with one end sealed by vibrating the tube until the filling density of the Bi-2223 precursor powder in the hydraulic tube is 1.8g / cm 3; The superconducting transition temperature of the Bi-2223 precursor powder is not more than 85K; The specific process of the vibration tube installation is: place the vibrating table, silver sheath and metal funnel in a glove box full of oxygen, and place the silver The bag is installed on the vibrating table, the metal funnel is fixed on the silver bag and the lower end of the metal funnel is located in the silver bag, then the Bi-2223 precursor powder is poured into the metal funnel, and the vibration table is started at the same time to adjust the hydraulic pressure. The tube is vibrated, so that the Bi-2223 precursor powder is loaded into the vibrating h...

Embodiment 3

[0043] The preparation method of the present embodiment Bi-2223 superconducting tape comprises the following steps:

[0044] Step 1: Fill the Bi-2223 precursor powder into a hydraulic tube with one end sealed by vibrating the tube until the filling density of the Bi-2223 precursor powder in the hydraulic tube is 1.9g / cm 3 ; The superconducting transition temperature of the Bi-2223 precursor powder is not more than 85K; The specific process of the vibration tube installation is: place the vibrating table, silver sheath and metal funnel in a glove box full of oxygen, and place the silver The bag is installed on the vibrating table, the metal funnel is fixed on the silver bag and the lower end of the metal funnel is located in the silver bag, then the Bi-2223 precursor powder is poured into the metal funnel, and the vibration table is started at the same time to adjust the hydraulic pressure. The tube is vibrated so that the Bi-2223 precursor powder is loaded into the vibrating h...

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Abstract

The invention provides a preparation method of a Bi-2223 superconducting tape. The preparation method comprises the following steps: 1, Bi-2223 precursor powder is loaded to a hydraulic pipe with a vibration pipe loading method; 2, a rod blank is obtained through isostatic pressing, then the rod blank is loaded into a silver pipe, and a Bi-2223 single-core composite is obtained after sealing; 3, a Bi-2223 multi-core wire is obtained through drawing treatment; 4, a Bi-2223 multi-core superconducting wire is obtained through heat treatment; 5, a semi-finished tape is prepared through rolling; 6, the Bi-2223 superconducting tape is obtained through intermediate heat treatment, single-pass rolling and finished product heat treatment in sequence. The texture and current loading performance of the Bi-2223 superconducting tape can be improved remarkably.

Description

technical field [0001] The invention belongs to the technical field of high-temperature superconducting material preparation, and in particular relates to a method for preparing a Bi-2223 superconducting tape. Background technique [0002] Bi-2223 high temperature superconductor (Bi 2 Sr 2 Ca 2 Cu 3 o x ) is the most important branch of high-temperature superconducting materials. Due to its easy processing and high current-carrying performance, Bi-2223 tape 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-2223 high-temperature superconducting wire strips. This 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 superconducting wire strip. [...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B13/00H01B12/02B22F3/04B22F3/24C22F1/02C22F1/16B21C37/02B21B1/22
CPCB21B1/22B21C37/02B22F3/04B22F3/24B22F2003/248C22F1/02C22F1/16H01B12/02H01B13/00Y02E40/60
Inventor 郝清滨李成山刘国庆徐晓燕焦高峰郑会玲张胜楠马小波李高山熊晓梅冯建情崔立军闫果张平祥
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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