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

Abstract

The invention discloses a method for preparing superconducting material by employing a high energy ball milling method. The method includes the steps of preparing a niobium-aluminum supersaturation solid solution by mixing Nb powder with purity of 99.999% and Al powder with purity of 99.999% or Nb powder with purity of 99.999% and Al-Ge mixed powder, with a mixing atomic ratio of Nb to Al being 3 to 1, and conducting high energy ball milling by filling Ar gas in a ball milling tank, rotating at a rotation speed of 800-1800r / min for 4.5-5.5 hours to obtain the niobium-aluminum supersaturation solid solution; preparing a Nb3Al superconductive wire single-core wire precursor; preparing a Nb3Al superconductive wire multi-core wire precursor; and conducting heat treatment process. The problems that a precursor in a conventional fast heat and fast cooling treatment under a high temperature may tend to be fractured easily is solved, and requirements on particularity of heating equipment are avoided. The obtained superconductive wire rod is uniform in component and excellent in performance, cost is effectively reduced, and mass production is facilitated.

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...

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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