Method for manufacturing closed loop superconducting coil by using magnesium diboride and closed loop superconducting coil

A technology of superconducting coils and magnesium diboride, which is applied in the direction of superconducting magnets/coils, coil manufacturing, magnetic objects, etc., can solve problems such as failures and research and development have just begun, and achieve operational simplification, market effects and social effects huge effect

Active Publication Date: 2012-08-01
NINGBO JANSEN NMR TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] For low-temperature superconducting materials, the production of closed-loop superconducting coils is a mature technology, which has been applied to the manufacture of superconducting magnets. However, the research and development of magnesium diboride closed-loop superconducting coils has just begun. The key step is to make and connect diboron There is no successful precedent for superconducting joints of magnesium oxide superconducting wires

Method used

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  • Method for manufacturing closed loop superconducting coil by using magnesium diboride and closed loop superconducting coil
  • Method for manufacturing closed loop superconducting coil by using magnesium diboride and closed loop superconducting coil
  • Method for manufacturing closed loop superconducting coil by using magnesium diboride and closed loop superconducting coil

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Embodiment approach 1

[0029] Embodiment 1: The present invention is a method for manufacturing a closed-loop superconducting coil with a magnesium diboride superconducting wire. The method has the following steps:

[0030] Step 1: Wind the unsintered magnesium diboride coil superconducting wire 1 on the coil frame 3 made of non-magnetic metal or ceramics by the solenoid coil winding method. The coil frame 3 in this embodiment is made of austenite Made of stainless steel, its diameter is 1m;

[0031] The above-mentioned coiled superconducting wire 1 is made of copper sheath material. Using an acidic solution to dissolve the copper sheaths at 5 mm from both ends of the coil superconducting wire 1 and the switching superconducting wire 2, so that the cores in the sheaths are exposed;

[0032] The above-mentioned acidic solution is nitric acid, sulfuric acid or hydrochloric acid, and the solvent of this embodiment is nitric acid with a concentration of 1 mol / L. After dissolving the jacket outside the...

Embodiment approach 2

[0038] Embodiment 2: The method for manufacturing a closed-loop superconducting coil from a magnesium diboride superconducting wire of the present invention, wherein the method has the following steps:

[0039] Step 1: Wind the unsintered magnesium diboride superconducting wire 1 on the skeleton 3 made of non-magnetic metal or ceramics by the solenoid coil winding method. The skeleton 3 of this embodiment is made of ceramics, and its diameter is 1M;

[0040] The above-mentioned coiled superconducting wire 1 is made of copper sheath material. Using an acidic solution to dissolve the copper sheaths at 5 mm from both ends of the coil superconducting wire 1 and the switching superconducting wire 2, so that the cores in the sheaths are exposed;

[0041] The above-mentioned acidic solution is nitric acid, sulfuric acid or hydrochloric acid, and the solvent of this embodiment is hydrochloric acid with a concentration of 1Mol / L. After dissolving the jacket outside the core, wash it ...

Embodiment approach 3

[0047] Embodiment 3: A method for manufacturing a closed-loop superconducting coil from a magnesium diboride superconducting wire of the present invention, wherein the method has the following steps:

[0048] Step 1: Wind the unsintered magnesium diboride superconducting wire 1 on the skeleton 3 made of non-magnetic metal or ceramics by the solenoid coil winding method. The skeleton 3 of this embodiment is made of austenitic stainless steel , whose diameter is 1.20M;

[0049] The above-mentioned coiled superconducting wire 1 is made of copper sheath material. Using an acidic solution to dissolve the copper sheaths at 5 mm from both ends of the coil superconducting wire 1 and the switching superconducting wire 2, so that the cores in the sheaths are exposed;

[0050] The above-mentioned acidic solution is nitric acid, sulfuric acid or hydrochloric acid, and the solvent in this embodiment is sulfuric acid with a concentration of 0.1Mol / L. After dissolving the jacket outside th...

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Abstract

The invention discloses a method for manufacturing a closed loop superconducting coil by using a magnesium diboride superconducting wire. The method comprises the following steps of: 1, winding an unsintered magnesium diboride superconducting wire on a bobbin by using a solenoid magnet winding method; 2, correspondingly arranging the two ends of the coil superconducting wire and the two ends of a switch superconducting wire in superconducting joints respectively, filling unsintered magnesium diboride powder into the superconducting joints, compacting the unsintered magnesium diboride powder, sealing the superconducting joints, and connecting the coil superconducting wire and the switch superconducting wire end to end to form the closed loop superconducting coil; 3, arranging the closed loop superconducting coil in a vacuum furnace and a furnace filled with a protective gas for sintering; and 4, slowly cooling the closed loop superconducting coil, and taking the cooled closed loop superconducting coil out. The invention also discloses the closed loop superconducting coil manufactured by the method. The closed loop superconducting coil can run without resistance at the temperature of about 20K, and required running temperature can be maintained only by using a low-cost cooler, so that use of high-cost liquid helium can be avoided, and the maintenance operation for a magnet is greatly simplified.

Description

technical field [0001] The invention relates to a method for manufacturing a closed-loop superconducting coil with a magnesium diboride superconducting wire and the closed-loop superconducting coil. The coil can be used for making a magnetic resonance imaging system, a nuclear magnetic resonance spectrometer, a physical experiment magnet, a superconducting limiter, and a magnetic resonance imaging system. Current devices and superconducting generators and other equipment. Background technique [0002] Superconducting materials have a wide range of applications in high-tech fields. Superconducting materials have two important properties, one is its diamagnetic property, that is, the Meissner effect, and the other is its zero resistance property. The most widely used magnetic resonance imaging device at present utilizes its zero-resistance property. The closed-circuit coil made of superconducting material operates without resistance below the superconducting critical transit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F41/04H01F6/06
Inventor 胡倾宇郑杰许建益
Owner NINGBO JANSEN NMR TECH CO LTD
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