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Superconducting composite wire made from magnesium diboride

A technology of magnesium diboride and composite wire, which is applied in the direction of superconducting magnets/coils, superconducting devices, permanent superconducting devices, etc., and can solve problems such as difficult to find solutions to these problems

Active Publication Date: 2007-08-15
哥伦布超导体有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In superconducting wires made of magnesium diboride MgB 2 It is extremely difficult to find solutions to these problems when made

Method used

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  • Superconducting composite wire made from magnesium diboride
  • Superconducting composite wire made from magnesium diboride
  • Superconducting composite wire made from magnesium diboride

Examples

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Embodiment Construction

[0018] In Figures 1 and 2, numeral 1 denotes a central core of conductive metal material. The conductive metal material is preferably copper or silver, as they are the most electrically conductive elements from an electrical point of view, and are also able to withstand heat treatment to which the conductor is subjected without melting, the heat treatment being in the range of 600°C to about 1000°C performed at temperature. Preferably, copper known as OFHC (Oxygen Free High Conductivity) copper is used because it has the highest possible conductivity at low temperatures.

[0019] The central core 1 is equipped with an outer coating 2 of a metallic material chemically compatible with magnesium diboride, acting as a barrier or impediment to the diffusion of the conductive metal into said superconducting phase. The barrier may be made of, for example, niobium, tantalum, iron, nickel, tungsten, molybdenum, chromium, or alloys thereof, and may have a minimum thickness sufficient t...

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PUM

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Abstract

A superconducting composite wire with superconducting phase of magnesium diboride comprises: a core of conductive metal (1); a plurality of filaments in which each filament (3) comprises a core of magnesium diboride (5), placed around said conductive metal core (1); - an outer metallic sheath (4) for containment and mechanical reinforcement, surrounding the said plurality of filaments; and - at least one layer (2, 2a, 2b) of metal chemically compatible with magnesium diboride and capable of acting as an obstacle to the diffusion of the conductive metal of said conductive metal core (1) towards the said filaments (3), up to 980 DEG C where the said at least one layer is applied a) as a coating (2) of the said conductive metal core and / or b) as a coating (2a) of the said filaments (3), and / or c) as a coating (2b) of the said magnesium diboride core (5) of the said filaments (3).

Description

technical field [0001] The invention relates to a superconducting composite wire or tape comprising a superconducting magnesium diboride material. Background technique [0002] The use of superconducting materials in various industrial applications requires many precautions and protective measures. One of the most prominent problems concerns the protection of coils made of superconducting wire in the event that superconductivity is interrupted for any reason, even if only for a moment. [0003] This can happen if, for example, the coolant that keeps the superconducting wire constant below its critical superconducting transition temperature is lost, even if the loss affects only a small portion of the coil. This is because superconducting materials typically have considerable electrical resistance when heated above their critical temperature, which typically varies from a few Kelvin to about 150°K, depending on the material. [0004] If this happens, it is critical to have ...

Claims

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Application Information

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IPC IPC(8): H01L39/14H01L39/24H01B12/06H01L39/16H01F6/06
CPCH01L39/141H01F6/02H01F6/06H10N60/202
Inventor G·格拉索A·马拉戈利A·S·西里
Owner 哥伦布超导体有限责任公司