Method suitable for continuously preparing high-temperature superconductive belt material

Abstract

The invention relates to a method suitable for continuously preparing a high-temperature superconductive belt material, which comprises the steps of: firstly, preparing a metal baseband; secondly, growing a compound separating layer on the metal baseband; then, growing a superconductive layer on the compound separating layer; and finally, growing a protecting layer on the superconductive layer. According to the invention, the in-situ preparation of the compound separating layer and the superconductive layer can be finished in the same coating system by adopting a multi-target multi-channel laser coating method; laser utilization rate and preparation speed of the belt material are greatly enhanced; vacuumizing time is reduced; equipment utilization rate is enhanced; and investment intensity of fixed assets is reduced so that the manufacturing cost of the high-temperature superconductive belt material is greatly reduced.

Description

technical field [0001] The invention relates to a method in the technical field of superconducting material preparation, in particular to a method suitable for continuously preparing high-temperature superconducting strips. Background technique [0002] Due to its unique physical properties, superconducting materials have attracted the attention of many scientists since the discovery of superconductivity at the beginning of the last century. The huge application prospects of its non-resistance and diamagnetic properties in the fields of industry, national defense, scientific research, and medicine have made governments of all countries attach great importance to the research of superconducting technology. Especially in application fields such as medicine and magnetic confinement nuclear fusion reactor, it is irreplaceable. Traditional low-temperature superconducting materials are located in the liquid helium temperature region, and expensive refrigeration costs limit the la...

AI Technical Summary

Problems solved by technology

[0005] Although the first generation of high-temperature superconducting tapes has begun commercial production and has been applied in demonstration projects such as superconducting cables, it is still unable to be widely used due to obstacles such as cost performance.

The main reasons are as follows: First, the first-generation high-temperature superconducting tapes represented by bismuth-based tapes cannot compare with yttrium-barium-copper-oxygen high-temperature superconducting tapes in terms of their superconducting current density and current transmission performance.

And after more than ten years of research and development, there is limited room for further improvement

Second, the superconducting current of the bismuth tape decays quickly in the magnetic field, that is, in the external magnetic field, when the magnetic field strength exceeds a certain value, it will lose its superconductivity

However, most applications in the energy and power fields are often related to strong magnetic fields, so the first generation of high-temperature superconducting tapes cannot be applied in most magnetic fields above medium strength

Third, because silver is a precious metal, the cost of raw materials is relatively high, so it is difficult to reduce the cost of the first-generation bismuth-based high-temperature superconducting strips produced by the "silver-coated" method to a price that competes with traditional copper wires

This reduces laser utilization and strip preparation speeds

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