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

Patent · 31 December 1995

OSTI ID:870665

Smith, Michael G ^[1]

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1. Los Alamos, NM

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.

• Research Organization: Los Alamos National Laboratory (LANL), Los Alamos, NM
• DOE Contract Number: W-7405-ENG-36
• Assignee: University of California (); Los Alamos National Laboratory ()
• Patent Number(s): US 5569641
• OSTI ID: 870665
• Country of Publication: United States
• Language: English

Related Subjects

-2223
/505/252/423/
000
20
200
26
45
55
75
ag-clad
annealing
cacuo
cao
cm
critical
critical current
cu
current
current densities
densities
grains
hours
mixture
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nominal
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oxide
oxide precursor
oxide-powder-in-the-robe
pb
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precursor
precursor mixture
precursor mixtures
precursor powder
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provided
range
reproducible
self-field
solution-synthesized
sr
stoichiometry
superconducting
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superconductor
synthesis
tapes
two-powder
well-aligned
wires