The oxygen potentials corresponding to the YBa sub 2 Cu sub 3 O sub 6+x phase in the Y-Ba-Cu-O system

Journal Article · Wed May 01 04:00:00 EDT 1991 · Journal of Solid State Chemistry; (United States)

DOI:https://doi.org/10.1016/0022-4596(91)90254-F· OSTI ID:7293831

Borowiec, K; Kolbrecka, K ^[1]

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1. Warsaw Univ. of Tech. (Poland)

Phase relations in the vicinity of the YBa{sub 2}Cu{sub 3}O{sub 6+x} in the CuO-rich part of the Y-Ba-Cu-O system were studied by the equilibration and quenching technique. At 950C, the system is characterized by the large number of solid four-phase combinations. The oxygen potential as a function of temperature for two four-phase combinations, i.e., YBa{sub 2}Cu{sub 3}O{sub 6+x} + BaCuO{sub 2} + BaCu{sub 2}O{sub 2} + Y{sub 2}BaCuO{sub 5} and YBa{sub 2}Cu{sub 3}O{sub 6+x} + BaCu{sub 2}O{sub 2} + Y{sub 2}BaCuO{sub 5} + Cu{sub 2}O, were studied by means of solid state EMF measurements. At higher oxygen potentials the pair of YBa{sub 2}Cu{sub 3}O{sub 6+x} and Y{sub 2}BaCuO{sub 5} is stable in contact with BaCuO{sub 2}. At lower oxygen pressures this pair coexists in equilibrium with BaCu{sub 2}O{sub 2} or Cu{sub 2}O.

• OSTI ID: 7293831
• Journal Information: Journal of Solid State Chemistry; (United States), Journal Name: Journal of Solid State Chemistry; (United States) Vol. 92:1; ISSN 0022-4596; ISSN JSSCB
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
COPPER COMPOUNDS
COPPER OXIDES
DATA
ELECTRIC POTENTIAL
ELEMENTS
ENERGY
EXPERIMENTAL DATA
FREE ENTHALPY
INFORMATION
LOW PRESSURE
MEDIUM VACUUM
NONMETALS
NUMERICAL DATA
OXIDES
OXYGEN
OXYGEN COMPOUNDS
PHASE STUDIES
PHYSICAL PROPERTIES
PRESSURE DEPENDENCE
STOICHIOMETRY
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE
TEMPERATURE RANGE 1000-4000 K
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES