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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. 2 figs.
Inventors:
Issue Date:
OSTI Identifier:
392650
Assignee:
Los Alamos National Lab., NM (United States) PTO; SCA: 360601; 360607; PA: EDB-96:166253; SN: 96001682415
Patent Number(s):
US 5,569,641/A/
Application Number:
PAN: 8-419,485; TRN: 96:028500
Contract Number:
W-7405-ENG-36
Resource Relation:
Other Information: PBD: 29 Oct 1996
Research Org:
University of California
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; BISMUTH OXIDES; SYNTHESIS; CRITICAL CURRENT; LEAD OXIDES; STRONTIUM OXIDES; CALCIUM OXIDES; COPPER OXIDES; SUPERCONDUCTING COMPOSITES; SILVER; HIGH-TC SUPERCONDUCTORS; GRAIN ORIENTATION; TRANSITION TEMPERATURE