Processing and fabication of YBa sub 2 Cu sub 4 O sub 8 and YBa sub 2 Cu sub 4 O sub 8 /YBa sub 2 Cu sub 3 O sub x composites

Conference · Tue Oct 31 23:00:00 EST 1989

OSTI ID:5363898

Balachandran, U; Biznek, M E; Goretta, K C; Veal, B W; Poeppel, R B; Mason, T O ^[1]

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1. Argonne National Lab., IL (USA)

Powders of YBa{sub 2}Cu{sub 4}O{sub 8}( 124'') were prepared via solid state reaction of Y{sub 2}O{sub 3}, BaCO{sub 3}, and CuO. The mixed precursors were heated in flowing oxygen of reduced total pressure, followed by cooling and annealing at 750{degree}C under ambient pressure oxygen. The procedure produced orthorhombic 124 as the main phase with YBa{sub 2}Cu{sub 3}O{sub x} ( 123'') as a minor impurity phase. The phase purity improved and nearly phase-pure 124 was obtained upon annealing the as-calcined powder in flowing oxygen at 800{degree}C. 12 refs., 3 figs.

• Research Organization: Argonne National Lab., IL (USA)
• Sponsoring Organization: DOE/CE; DOE/ER; NSF
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 5363898
• Report Number(s): CONF-891119-19; ON: DE90003559
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360201* -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
ANNEALING
BARIUM CARBONATES
BARIUM COMPOUNDS
BARIUM OXIDES
CARBON COMPOUNDS
CARBONATES
CHALCOGENIDES
COHERENT SCATTERING
COPPER COMPOUNDS
COPPER OXIDES
DIFFRACTION
FABRICATION
HEAT TREATMENTS
OXIDES
OXYGEN COMPOUNDS
POWDERS
SCATTERING
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS
X-RAY DIFFRACTION
YTTRIUM COMPOUNDS
YTTRIUM OXIDES