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Metal-armored high-temperature superconducting wire and preparation method thereof

A high-temperature superconducting and metal armoring technology, applied in the usage of superconducting elements, superconducting devices, superconducting/high-conducting conductors, etc., can solve problems such as insufficient bonding force and inability to meet lateral twisting and other problems

Inactive Publication Date: 2019-04-05
GUANGDONG ELECTRIC POWER SCI RES INST ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a metal-armored high-temperature superconducting wire and a preparation method thereof, which solves the problem that the existing superconducting wires and superconducting strips are stacked with insufficient bonding force, so that the lateral twist cannot be satisfied

Method used

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  • Metal-armored high-temperature superconducting wire and preparation method thereof
  • Metal-armored high-temperature superconducting wire and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Preparation of metal armored high temperature superconducting wire:

[0047] (1) Cut six second-generation high-temperature superconducting strips into filaments and stack them with solder with a melting point of 200-250°C to prepare a superconducting wire with a square cross-section;

[0048] (2) The square superconducting wire formed by stacking the second-generation high-temperature superconducting tapes and the metallic copper used for armoring are placed in a temperature-adjustable groove filled with low-temperature solder (melting point: 130°C).

[0049] (3) Adjust the temperature of the low-temperature solder in the groove to ensure that the low-temperature solder melts and is lower than the melting point of the high-temperature solder, and immerse the stacked strip and the metal used for armoring in the low-temperature solder.

[0050] (4) Pull the superconducting wire and the armored metal forward at 3cm / s-4cm / s through the traction device, and at the same time...

Embodiment 2

[0053] Preparation of metal armored high temperature superconducting wire:

[0054] The melting point of low-temperature solder in step (2) of this embodiment is 170° C., and other steps are the same as in embodiment 1.

Embodiment 3

[0059] The critical current and the twisted appearance of the metal-sheathed high-temperature superconducting wires prepared in Example 1, Example 2, and Comparative Example 1 and the superconducting wires without armoring were detected.

[0060] As shown in Table 1, the inner tapes of the metal-sheathed high-temperature superconducting wires prepared in Examples 1 and 2 are closely bonded without deformation, and the ratio of the critical current to the critical current of the superconducting wire before armoring is higher than 95%. However, when the melting point of low-temperature solder is the same as that of high-temperature solder, the internal strip structure of the metal-armored high-temperature superconducting wire is loose and not square. The unarmored superconducting wire is a superconducting square wire, and its current carrying capacity is basically the current carrying capacity of a stack of superconducting flat tapes. Although the critical current is high, the mech...

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Abstract

The invention relates to the technical field of superconducting tape materials and in particular to a metal-armored high-temperature superconducting wire and a preparation method thereof. The invention discloses a preparation method of a metal-armored high-temperature superconducting wire. The method comprises the following steps of 1, stacking and soldering a second-generation high-temperature superconducting tape material with high-temperature solder tin to obtain a superconducting wire; and 2, armoring the superconducting wire with metal by using a low-temperature solder tin to obtain the metal-armored high-temperature superconducting wire. After the metal-armored high-temperature superconducting wire obtained by the preparation method is twisted, the inner tape material is tightly combined and is not deformed, and a ratio of the critical current to the critical current of the superconducting wire before armoring is higher than 95%, thereby solving the technical problem that the superconducting tape material of the existing superconducting wire has insufficient stack bonding force and thus cannot satisfy lateral twisting.

Description

technical field [0001] The invention relates to the technical field of superconducting strips, in particular to a metal armored high-temperature superconducting wire and a preparation method thereof. Background technique [0002] Since the first discovery of superconductivity in the laboratory by Professor Kamerlingh Onnes of Leiden University in the Netherlands in 1911, superconducting materials and their applications have been the most active frontier research field in contemporary science and technology. one. In the past ten years, the research on superconducting power devices based on high-temperature superconductivity has developed rapidly, and remarkable achievements have been made in the fields of superconducting energy storage, superconducting cables, superconducting current limiters, and superconducting transformers. [0003] Critical melting point, critical magnetic field and critical current are the three inherent critical parameters of all superconducting materi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B12/00H01B13/22
CPCH01B12/00H01B13/22Y02E40/60
Inventor 罗运松宋萌胡南南史正军程文锋夏亚君李力韦玮李柱永金之俭
Owner GUANGDONG ELECTRIC POWER SCI RES INST ENERGY TECH CO LTD
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