Processing and properties of silver-clad Tl-Ba-Ca-Cu-O wires and tapes

摘要

TlBa(sub 2)Ca(sub 2)Cu(sub 3)O(sub x) and Tl(sub 2)Ba(sub 2)Ca(sub 2)Cu(sub 3)O(sub x) powders were synthesized, loaded into Ag tubes, and worked into wires and tapes by drawing and rolling. All processing outside of furnaces was in a dry-N(sub 2) glovebox. All heat treatments were performed in O(sub 2). The Ag-clad wires fabricated from these powders exhibited onset of superconductivity at (approx)118 K and critical current densities at 77K of 2(times)10(sup 3) to 4(times)10(sup 3) A/cm(sup 2).