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Title: Synthesis of Bi.sub.1.8 Pb.sub.0.4 Sr.sub.2 Ca.sub.2 Cu.sub.3 O.sub.x superconductor

Two-powder processes for the synthesis of superconducting (Bi, Pb)-2223/Ag-clad wires by the oxide-powder-in-the-robe are provided. The first precursor powder, of nominal stoichiometry CaCuO.sub.x, is a solution-synthesized mixture of Ca.sub.0.45 Cu.sub.0.55 O.sub.2 and CaO. Using these oxide precursor mixtures, superconducting tapes with well-aligned grains and reproducible critical current densities J.sub.c in the range of 20,000 to 26,000 A/cm.sup.2 at 75 K in self-field after annealing less than 200 hours were obtained.
Inventors:
 [1]
  1. (Los Alamos, NM)
Issue Date:
OSTI Identifier:
870665
Assignee:
University of California (); Los Alamos National Laboratory () LANL
Patent Number(s):
US 5569641
Contract Number:
W-7405-ENG-36
Research Org:
Los Alamos National Laboratory (LANL), Los Alamos, NM
Country of Publication:
United States
Language:
English
Subject:
synthesis; pb; sr; cu; superconductor; two-powder; processes; superconducting; -2223; ag-clad; wires; oxide-powder-in-the-robe; provided; precursor; powder; nominal; stoichiometry; cacuo; solution-synthesized; mixture; 45; 55; cao; oxide; mixtures; tapes; well-aligned; grains; reproducible; critical; current; densities; range; 20; 000; 26; cm; 75; self-field; annealing; 200; hours; obtained; precursor mixture; current densities; critical current; precursor powder; precursor mixtures; oxide precursor; superconducting tape; /505/252/423/

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