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Ultra-conductive magnetic-field shield room and preparation method thereof

A shielding room and superconducting technology, applied in the direction of magnetic/electric field shielding, electrical components, etc., can solve the problems of expensive shielding system, serious magnetic flux leakage, poor shielding effect, etc., and achieve uniform speed, high speed and excellent performance. Effect

Inactive Publication Date: 2006-08-16
INST OF PHYSICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the disadvantages of the existing shielding system, which are expensive, bulky, poor shielding effect, and serious magnetic flux leakage, so as to provide a superconducting shielding room that can be applied in a low magnetic field and prepare a superconducting shielding room using electrophoresis technology. Magnesium boride superconducting shielded room method

Method used

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  • Ultra-conductive magnetic-field shield room and preparation method thereof
  • Ultra-conductive magnetic-field shield room and preparation method thereof
  • Ultra-conductive magnetic-field shield room and preparation method thereof

Examples

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Effect test

Embodiment 1

[0029] Embodiment 1: prepare MgB with hollow iron pipe 2 Superconducting shielded room

[0030] In this embodiment, a hollow pure iron pipe 6 with a section diameter of 1 centimeter, a height of 3 centimeters and a wall thickness of 0.3 centimeters is taken, and a layer of superconducting magnesium boride film 3 with a thickness of about 70 um is deposited on its inner wall. The two ports of the hollow pure iron pipe 6 are covered with top covers 1 and 4 made of magnesium diboride, so that the MgB 2 Superconducting shielded rooms, such as figure 1 shown.

Embodiment 2

[0032] In this embodiment, a section diameter is 2.3 centimeters, a height is 5 centimeters, and a ceramic tube 6 with a wall thickness of 0.3 centimeters is deposited on the inner wall with a thick silver layer of about 30 um; Superconducting magnesium boride film 3, and the two ports of this tube 6 are covered with the top cover 1,4 that magnesium diboride makes, thus just made MgB 2 Superconducting shielded rooms, such as figure 1 shown.

Embodiment 3

[0033] Embodiment 3: prepare MgB with hollow Al2O3 ceramic tube 2 Superconducting shielded room

[0034] In Al2O3 The inner wall of the ceramic tube is evaporated and deposited a layer of copper film in advance, and its thickness is 10 Å; Then repeat embodiment 1, just obtain the Al of the same structure with embodiment 1O3 The MgB with the copper film on the inner wall of the ceramic tube 2 Superconducting shielded room.

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Abstract

This invention relates to superconducting magnetic field shielding chamber and its preparation method. The shielding chamber includes: a hollow metal pipe or a ceramic pipe plated with metal layer in the inside wall and a top cover characterizing in having a uniform and tight MgB2 film in the inside walls of the metal pipe or the ceramic pipe and covering MgB2 top cover on the pipe end. This invention applies two steps to prepare MgB2 super shield chamber as follow: electrophoresisting a MgB2 film in the inside surface of the pipe first then be sintered in Mg vapour.

Description

technical field [0001] The invention relates to the field of preparation of superconducting shielding chambers, in particular to the preparation of magnesium diboride MgB applied in low magnetic field by electrophoresis technology 2 Superconducting magnetic field shielding room and its preparation method. Background technique [0002] The magnetic shielding system is to shield the external magnetic noise, so as to form a low magnetic or even zero magnetic state in a specific space, so as to carry out high-precision electromagnetic or biological measurement and research. Materials with high conductivity, such as permalloy (Fe-Ni) alloy, or made of superconductor materials with complete diamagnetism, using permalloy (Fe-Ni) alloy for shielding is expensive, bulky, poor shielding effect, and magnetic flux leakage The phenomenon is serious, (Document 1: Magnetic-field simulation for shielding from highmagnetic fields, J.Appl.Phys, Vol 91, 6991, 2002)....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05K9/00C25D3/00
Inventor 张芹许加迪周岳亮朱亚彬王淑芳陈正豪吕惠宾杨国桢
Owner INST OF PHYSICS - CHINESE ACAD OF SCI
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