Oxygen stoichiometry, structural transitions, and thermodynamic behavior of the YBa sub 2 Cu sub 3 O sub x system

Conference · Sun Jan 01 04:00:00 EST 1989

OSTI ID:5612357

Tetenbaum, M; Curtiss, L A; Tani, B; Czech, B; Blander, M ^[1]

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1. Argonne National Lab., IL (USA)

Electromotive force (EMF) measurements of oxygen fugacities as a function of oxygen stoichiometry in the YBa{sub 2}Cu{sub 3}O{sub x} system (1-2-3 superconductor) have been carried out over the composition range x {approx equal} 6.15 to 6.9 and the temperature range 400--750{degree}C. A coulometric titration technique with an yttria-doped zirconia electrolyte was used for these measurements. By means of this technique, the oxygen content of the superconductor is varied by well-defined small amounts, and the equilibrium oxygen partial pressures can be established from the EMF measurements. The overall objective of these studies is to investigate the phase transformations and thermodynamic behavior of the YBa{sub 2}Cu{sub 3}O{sub x} system as a function of oxygen partial pressure, oxygen stoichiometry, and temperature. 24 refs., 8 figs.

• Research Organization: Argonne National Lab., IL (USA)
• Sponsoring Organization: DOE/ER
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 5612357
• Report Number(s): CONF-890806-2; ON: DE89017694
• 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
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CRYSTAL LATTICES
CRYSTAL STRUCTURE
ELECTROMOTIVE FORCE
ELEMENTS
EQUILIBRIUM
NONMETALS
ORTHORHOMBIC LATTICES
OXIDES
OXYGEN
OXYGEN COMPOUNDS
PARTIAL PRESSURE
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
STOICHIOMETRY
SUPERCONDUCTORS
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS