Heat treatment of wires on the basis of the high T sub c superconductor YBa sub 2 Cu sub 3 O sub x

Journal Article · Mon Aug 28 00:00:00 EDT 1989 · Applied Physics Letters; (USA)

DOI:https://doi.org/10.1063/1.102451· OSTI ID:5614312

Muller, P; Schubert, M; Rodig, C; Fuchs, G; Fischer, K ^[1]

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1. Central Institute of Solid State Physics and Materials Science, Helmholtzstrasse 20, 8027 Dresden, German Democratic Republic, East Germany (DD)

Ag-sheathed powder-in-tube wires on the basis of the high {ital T}{sub {ital c}} superconductor YBa{sub 2}Cu{sub 3}O{sub {ital x}} are produced by a drawing process. After cold working, the wires are not superconducting. By heat treatment at temperatures {gt}900 {degree}C, lattice defects are healed and the contact between the grains is improved. After this heat treatment the wires are slowly cooled in an O{sub 2} atmosphere in order to adjust the optimum O{sub 2} stoichiometry. The annealing temperature has a strong influence on the attainable critical current density. By annealing a wire with 420 ppm carbon content at 950 {degree}C, {ital j}{sub {ital c}} values of 5020 A/cm{sup 2} at 4.2 K and 1130 A/cm{sup 2} at 77 K were achieved. Drastically reduced critical current densities in wires with high carbon content demonstrate the importance of a low carbon content for achieving high critical current densities in YBa{sub 2}Cu{sub 3}O{sub {ital x}} .

• OSTI ID: 5614312
• Journal Information: Applied Physics Letters; (USA), Vol. 55:9; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BARIUM OXIDES
HEAT TREATMENTS
SUPERCONDUCTIVITY
COPPER OXIDES
SUPERCONDUCTING WIRES
FABRICATION
YTTRIUM OXIDES
CRITICAL CURRENT
CRITICAL FIELD
CRYSTAL DEFECTS
EXPERIMENTAL DATA
HIGH TEMPERATURE
LOW TEMPERATURE
STOICHIOMETRY
VERY HIGH TEMPERATURE
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
CHALCOGENIDES
COPPER COMPOUNDS
CRYSTAL STRUCTURE
CURRENTS
DATA
ELECTRIC CONDUCTIVITY
ELECTRIC CURRENTS
ELECTRICAL PROPERTIES
INFORMATION
MAGNETIC FIELDS
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
TRANSITION ELEMENT COMPOUNDS
WIRES
YTTRIUM COMPOUNDS
360201* - Ceramics
Cermets
& Refractories- Preparation & Fabrication
360204 - Ceramics
Cermets
& Refractories- Physical Properties
656100 - Condensed Matter Physics- Superconductivity