Title:
METHOD OF MANUFACTURING MgB2 SUPERCONDUCTING MATERIAL
Document Type and Number:
Japanese Patent JP3757270
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a method of manufacturing an MgB2 superconducting material which facilitates the manufacturing of the MgB2 superconducting material by suppressing the oxidation and evaporation of Mg as far as possible, can improve superconducting performance and reduce a manufacturing cost.
SOLUTION: The sintered MgB2 compact having the superconducting performance is manufactured by embedding a molding made by mixing Mg power and B powder at an atomic ratio of 1:2 and compacting the mixture to form a molding body and embedding the molding body into a powder mixture composed of Ti and C, then heating strongly one end of the powder mixture composed of the Ti and C by ignition to induce the reaction expressed by Ti+ C→TiC, synthesizing the entire part of powder mixture composed of the Ti and C to TiC by the self-propagation high-temperature synthesis of the chain reaction resulting from the successive propagation of the heat of the formation generated at this time, inducing the reaction expressed by Mg+2B→MgB2 by the heat of the formation released during this time and leading this reaction also to the self-propagation high-temperature synthesis over the entire part of the molding body.
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Inventors:
Yoshida Kaieda
Oguro Nobutaka
Oguro Nobutaka
Application Number:
JP2001350292A
Publication Date:
March 22, 2006
Filing Date:
November 15, 2001
Export Citation:
Assignee:
National Institute for Materials Science
International Classes:
C04B35/58; C01B35/04; C01G1/00; (IPC1-7): C04B35/58
Domestic Patent References:
| JP9071479A | ||||
| JP10101433A | ||||
| JP11246848A |
Foreign References:
| WO1995008654A1 | ||||
| WO1999003641A1 |
Other References:
Jun Nagamatsu et al.,Superconductivity at 39K in magnesium diboride,nature,日本,ネイチャー・ジャパン(株),2001年 3月 1日,第410巻第6824号,第63、64頁
秋光純、銭谷勇磁,実用化への期待も-絶対温度39度で超伝導の金属系新材料,高圧ガス,日本,高圧ガス保安協会(KHK),2001年 7月 1日,第38巻7号 通巻376号,第15頁
秋光純、銭谷勇磁,実用化への期待も-絶対温度39度で超伝導の金属系新材料,高圧ガス,日本,高圧ガス保安協会(KHK),2001年 7月 1日,第38巻7号 通巻376号,第15頁