| 摘要 |
PURPOSE:To provide improvement in the current density required for an assembled conductor by using wire rods each reading a low-resistance value under a current density of not less than the critical current density of oxide group superconductive wire-rods for at least one part of the oxide group superconductive wire-rods forming the assernbled conductor. CONSTITUTION:For an oxide group superconductive wire-rods are used different types of tape-like wire-rods 1a and 1b each comprising a core 2 which is made of an oxide group superconductor, such as Y-Ba-Cu-O, Bi-Sr-Cu-O, Tl-13a-Cu-C, La-Na-Cu-O or the like, coated with a film 3 made of Ag, Cu, Al or the like. A plurality of the wire rods 1a, 1b are laminated upon one another, and subsequently fine lead-wire 4 is wound round the resultant laminate to assemble the wire rods into a conductor. Each of the wire rods 1a, 1b is manufactured through the process of reducing the resistance value of the wire rod given under a current density of not less than the critical current density of the wire rod by priority to the resistance value of the wire rod given under the critical current density. This process provides improvement in the current density required for the resultant assembled conductor.
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