Method for preparing superconducting material by employing high energy ball milling method

A technology of high-energy ball milling and superconducting materials, which is used in heat treatment equipment, cable/conductor manufacturing, electrical components, etc. It can solve the problems of easy breakage of precursors and easy breakage of wires, so as to avoid easy breakage and damage to heating equipment. Special requirements, excellent performance, and the effect of large-scale production

Inactive Publication Date: 2016-09-28
CHENGDU JUNHE TIANCHENG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0017] The purpose of the present invention is to design a kind of method that adopts high-energy ball milling method to prepare superconducting material, solves the problem of prior art preparation Nb 3 When Al superconducting wires are processed at high temperature, the Nb3Al precursor wires are easy to break. A new superconducting material preparation method is adopted to avoid the precursors being easily broken at high temperatures and special heating equipment in the traditional fast heating and fast cooling treatment. The obtained superconducting wire has uniform composition and excellent performance, which effectively reduces the cost and facilitates large-scale production

Method used

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Examples

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Embodiment 1

[0038] A method for preparing superconducting materials by high-energy ball milling, comprising the following process steps:

[0039] 1) Preparation of niobium-aluminum supersaturated solid solution:

[0040] Take Nb powder with a purity of 99.999% and Al powder with a purity of 99.999%, or Nb powder with a purity of 99.999% and Al-Ge mixed powder, mix according to the atomic ratio of Nb and Al at a ratio of 3:1, and mix Put the powder in a ball mill jar, add a ball milling agent, and carry out high-energy ball milling. The ball mill jar is filled with Ar gas, the rotation speed is 800~1800r / min, and the ball milling time is 4.5~5.5h to obtain a niobium-aluminum supersaturated solid solution;

[0041] 2) Preparation of Nb 3 Al superconducting wire single core wire precursor:

[0042] Put the niobium-aluminum supersaturated solid solution prepared in step 1) into a Cu tube, and perform multi-pass drawing processing to obtain a single core wire precursor;

[0043] 3) Preparat...

Embodiment 2

[0048]This embodiment is further optimized on the basis of the above-mentioned embodiments. In order to better realize the present invention, it is specially set up in the following way: in the Al-Ge mixed powder described in step 1), Ge accounts for the total amount of Al-Ge The mass fraction of the amount is 3.2-28.7%, and the sum of the mass percentages of Al and Ge is 100%.

Embodiment 3

[0050] This embodiment is further optimized on the basis of any of the above-mentioned embodiments. In order to better realize the present invention, the following method is specially set up: the mass ratio of balls and mixed powder in the ball mill tank described in step 1) is 9:1-1.2.

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Abstract

The invention discloses a method for preparing superconducting materials by adopting a high-energy ball milling method. 99.999% Nb powder and Al-Ge mixed powder are mixed according to the ratio of Nb and Al atomic ratio of 3:1, and then high-energy ball milling is carried out. The ball mill tank is filled with Ar gas, and the speed is 800~1800r / min. For 4.5~5.5h, the niobium-aluminum supersaturated solid solution is obtained; the preparation of Nb 3 Al superconducting wire single core wire precursor; preparation of Nb 3 Al superconducting wire multi-core wire precursor; heat treatment process; avoiding the need for easy fracture of the precursor at high temperature and the special requirements for heating equipment in the traditional fast heating and fast cooling treatment, and the obtained superconducting wire has uniform composition, excellent performance, and effective The cost is reduced, which is beneficial to large-scale production.

Description

technical field [0001] The invention relates to the technical field of new materials, in particular to a method for preparing superconducting materials by using a high-energy ball milling method. Background technique [0002] A superconducting material refers to a material that exhibits the properties of zero resistance and repelling magnetic lines of force under certain low temperature conditions. It has been found that 28 kinds of elements and thousands of alloys and compounds can become superconductors. [0003] Superconducting materials have the following properties: [0004] zero resistance [0005] In the superconducting state, superconducting materials have zero electrical resistance and can transmit electrical energy without loss. If a magnetic field is used to induce a current in the superconducting loop, this current can be maintained without decay. This "persistent current" has been observed experimentally many times. [0006] Diamagnetic [0007] When the s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B13/00B02C17/10B21C37/04
CPCH01B13/0016B02C17/10B21C37/045
Inventor 李会玲
Owner CHENGDU JUNHE TIANCHENG TECH
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