Fremgangsmåde til fremstilling af oxid superledende wire

摘要

The diameter of a first metal tube charged with raw material powder is reduced for obtaining an elementary wire. A plurality of such elementary wires are charged into a second metal tube, which in turn is reduced in diameter for obtaining a round first wire having a plurality of first filaments. The first wire (1) is uniaxially compressed thereby obtaining a tape-like second wire having a plurality of second filaments. The second wire (2) is heat treated thereby obtaining an oxide superconducting wire including a plurality of superconductor filaments (10). The maximum grain size of the raw material powder is smaller than the minor diameter of the first or second filaments.