Oxidation of Ba/sub 2/YCu/sub 3/O/sub x/ at high Po/sub 2/

Journal Article · Sat Jul 01 04:00:00 EDT 1989 · Journal of the American Ceramic Society; (USA)

DOI:https://doi.org/10.1111/j.1151-2916.1989.tb09734.x· OSTI ID:5264006

O'Bryan, H M; Gallagher, P K; Laudise, R A; Caporaso, A J; Sherwood, R C ^[1]

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1. AT and T Bell Labs., Murray Hill, NJ (USA)

Dense large-grain ceramic samples of Ba/sub 2/YCu/sub 2/O/sub chi/ have been oxidized at 400{sup 0} to 500{sup 0}C in 10 to 30 MPa of oxygen for 1 to 10 d. The high-pressure treatment has increased the equilibrium content chi slightly above 7 but there is no concomitant increase in Tc. At chi=7.03 the superconducting transition, measured by ac susceptibility, has an onset temperature of --91 {Kappa} and {Delta}T--4 {Kappa} and no change in lattice parameter is observed. High oxygen pressure increases the rate of oxidation.

• OSTI ID: 5264006
• Journal Information: Journal of the American Ceramic Society; (USA), Journal Name: Journal of the American Ceramic Society; (USA) Vol. 72:7; ISSN JACTA; ISSN 0002-7820
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360202 -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
360205 -- Ceramics
Cermets
& Refractories-- Corrosion & Erosion
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
COPPER COMPOUNDS
COPPER OXIDES
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
HIGH PRESSURE
LATTICE PARAMETERS
MAGNETIC PROPERTIES
MAGNETIC SUSCEPTIBILITY
MEASURING METHODS
OXIDATION
OXIDES
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
SUPERCONDUCTIVITY
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
YTTRIUM COMPOUNDS
YTTRIUM OXIDES