| 摘要 |
PURPOSE:To obtain an oxide superconductor having high critical current density by placing a molded article of mixed powder of a specific element, Ba and Cu in a furnace and burning the molded article while introducing oxygen into the furnace and applying a magnetic field. CONSTITUTION:In a method of producing an oxide superconductor of R-Ba-Cu-O (R element such as Eu, Gd, Tb, By, Ho, Er or Tm having high magnetic susceptibility among group IIIa elements of the periodic table). Namely, mixed powder containing the element R, Ba and Cu in a given ratio is prepared and the mixed powder is subjected to pressure molding to prepare a molded article. The molded article is placed in a furnace capable of preparing an oxygen existing atmosphere in the interior and a magnetic field generator is used. Then oxygen is sent to the furnace and the molded article is sintered while applying a magnetic field to the interior of the furnace by the magnetic field generator to give the aimed superconductor. |
