The method of precursor wire and its manufacturing an oxide superconducting wire, and the oxide superconducting wire using the precursor wire

Inside the first sheath made of silver or a silver alloy, a precursor wire of an oxide superconducting wire outer peripheral segments of the plurality of surrounding the center portion is arranged close to the outer peripheral segments, the oxide superconductor of the second sheath made of silver or a silver alloy around a ribbon-like filaments of the precursor consists of single-core segments of the cross-section arched coated, the outer peripheral segment of the plurality of found wide surface of the outer peripheral segments the center so as to surround a precursor wire of an oxide superconducting wire are arranged in stacked concentrically.