公开(公告)号：JP2003089516A

公开(公告)日：2003-03-28

申请号：JP2001280244

申请日：2001-09-14

Applicant: INT SUPERCONDUCTIVITY TECH ,  JAPAN SCIENCE & TECH CORP

Inventor： MACHI TAKAHITO ,  KATO ISAO ,  ITO YUTAKA ,  KOSHIZUKA NAOKI ,  MURAKAMI MASAHITO

IPC: C01G1/00 ,  C01B35/04 ,  H01B13/00

Abstract: PROBLEM TO BE SOLVED: To provide an MgB2 superconductor easy to produce and mass- producible as long articles, and to provide a method for producing the superconductor. SOLUTION: The MgB2 superconductor consists of a shell made of a tubular metal such as copper and a core material of the reaction product of Mg and B formed by sealing Mg and B in the shell and heating these. In the method for producing the superconductor, Mg and B are sealed in the tubular metal, the tubular metal in which Mg and B have been sealed is optionally worked in a wire or belt shape and Mg and B are reacted by heating the tubular metal as shown in figure 1. The tubular metal as the shell may be removed from the material after the reaction to obtain an MgB2 superconductor.

公开(公告)号：JP2003095652A

公开(公告)日：2003-04-03

申请号：JP2001286626

申请日：2001-09-20

Applicant: INT SUPERCONDUCTIVITY TECH

Inventor： MACHI TAKAHITO ,  KATO ISAO ,  KOSHIZUKA NAOKI

IPC: C01G3/00 ,  C01G1/00 ,  C30B29/22 ,  H01B13/00

Abstract: PROBLEM TO BE SOLVED: To provide a 123 superconductor of rare-earth series which is simple to manufacture and ensures a high irreversible magnetic field. SOLUTION: In the 123 superconductor of rare-earth series which gives the substance represented by the chemical formula of REBa2 Cu3 O7-d (wherein RE is a rare-earth element) as the main element, substituting a portion of RE with Ca ensures the performance that the irreversible magnetic field at the temperature of 77 K is not less than 10 T when applying the magnetic field in the direction of axis C. La, Nd, Sm, Gd or Eu is preferred as RE and in the chemical composition it is preferred that the values of (x) and (y) in RE1-x+y Cax Ba2-y Cu3 O7-d meet the requirements of 0