Processing and Properties of Silver-Clad Tl-Ba-Ca-Cu-O Wires and Tapes

Abstract

TlBA2Cu3Ox and Tl2Ca2Cu3Ox 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-N2 glovebox. All heat treatments were performed in O2. The Ag-clad wires fabricated from these powders exhibited onset of superconductivity at ≈118 K and critical current densities at 77 K of 2 × 103 to 4 ×103 A/cm2.

Liquid phase sintering and microstructure development of Ag-clad Tl-1223 superconductor

“…For all powder assemblages, the tapes were weak linked and J c decreased significantly upon application of a small external field. The J c results are similar to results reported for other work on Tl-1223 PIT conductors [20][21][22].…”