MgB2-based superconductor having high cirtical current density and method for mfg. same

A critical current density, current density technology, applied in cable/conductor manufacturing, usage of superconductor elements, superconductor components, etc., can solve problems such as small prospects

Inactive Publication Date: 2003-12-24
INT SUPERCONDUCTIVITY TECH CENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in order to obtain a material exhibiting a high critical current density, the material must be synthesized in a high-pressure atmosphere (eg, 40,000-60,000 atm), and therefore, it has little prospect for use as a superconducting material, which is currently Requires low-cost mass production

Method used

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  • MgB2-based superconductor having high cirtical current density and method for mfg. same
  • MgB2-based superconductor having high cirtical current density and method for mfg. same
  • MgB2-based superconductor having high cirtical current density and method for mfg. same

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Embodiment 1

[0047] Magnesium powder, boron powder (amorphous) and titanium powder, each having a purity of 99% and a particle size passing through a 300-mesh sieve, were mixed under atmospheric pressure and pressed into pellets (green bodies) with a diameter of 7 mm and a height of 6 mm.

[0048] This small piece (green body) is then placed on a MgO plate in an electric furnace, heated at 600°C for 1 hour first in an argon flow at 1 atmosphere, then at 800°C for 1 hour, and then further heated at 900°C for 2 hours , and then cooled to room temperature in an electric furnace. The treatment produces MgB 2 base superconductor (sintered body).

[0049] figure 2 is a schematic diagram illustrating the processing steps in this embodiment.

[0050] Adjusting the amount of raw material powder supplied therein so as to obtain MgB with different titanium contents 2 A base superconductor, wherein, when the amounts of magnesium, boron and titanium are represented by the atomic ratio Mg:B:Ti=x:2:...

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Abstract

The present invention relates to an MgB2-based superconductor that is easy to manufacture and well suited to mass production, and that exhibits excellent superconducting characteristics (such as a high critical current density) while still retaining the high critical temperature characteristics of MgB2. A powder mixture of magnesium, boron, and titanium is pressed into a pellet, and this product is sintered under an atmospheric pressure and other conditions (preferably at 600 DEG C or higher) to manufacture an MgB2-based superconductor in which titanium and / or a titanium compound are dispersed in polycrystalline MgB2. The composition of the MgB2-based superconductor is preferably adjusted to have an atomic ratio of Mg:B:Ti = x:2:y, 0.7 < x < 1.2 and 0.05 < y < 0.3, and more preferably 0.07 < y < 0.2, by adjusting the amounts in which the raw materials are added.

Description

technical field [0001] The present invention relates to a kind of MgB 2 A base superconductor, the superconductor has excellent superconducting properties, such as exhibiting a high critical current density, etc., and is easy to manufacture, and the invention also relates to a method for manufacturing the superconductor. Background technique [0002] Metal-based superconductor materials such as NbTi and Nb 3 Sn is currently the most common material used for superconducting wires used in high-field magnets and the like. However, since these materials have very low critical temperatures T c , their use temperature is limited to the temperature range of liquid helium, so there are big problems associated with quenching the superconductor. [0003] Due to this problem, in cases involving MgB 2 There has recently been much interest in reports of the superconducting properties of MgB 2 is a boride of magnesium, and MgB has been investigated from various angles 2 Usability as...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L39/12
CPCC04B35/6303H01L39/2487C04B2235/401C04B2235/3813C04B2235/80C04B2235/404Y10S420/901C04B35/58057Y02E40/641H01L39/125Y10S428/93Y02E40/64C04B2235/94C04B2235/5436C04B2235/421H10N60/855H10N60/0856H01B12/00
Inventor 赵勇冯勇吴源町敬人札本安识腰塚直己村上雅人
Owner INT SUPERCONDUCTIVITY TECH CENT
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