Characterization of YBa sub 2 Cu sub 4 O sub 8 high temperature electrical properties and thermodynamic stability
Journal Article
·
· Journal of Materials Research; (United States)
- Department of Materials Science and Engineering and Materials Research Center, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208 (USA)
Via {ital in} {ital situ} electrical property measurements (conductivity, Seebeck coefficient) over the temperature range 500--800 {degree}C and oxygen partial pressure range 10{sup {minus}4}--1 atm, the equilibrium transport properties and stability range of YBa{sub 2}Cu{sub 4}O{sub 8} were determined. YBa{sub 2}Cu{sub 4}O{sub 8} behaves like the intrinsically mixed-valent compound, magnetite (Fe{sub 3}O{sub 4}), with small variations in electrical properties with changes in oxygen partial pressure. The decomposition boundary to YBa{sub 2}Cu{sub 3}O{sub 6+{ital y}} (or YBa{sub 2}Cu{sub 3.5}O{sub 7.5{plus minus}{ital z}}) and CuO occurs at log({ital p}{sub O{sub 2}},atm) ={minus}1.24{times}10{sup 4}/{ital T}(K)+11.01(773{le}{ital T}(K){le}1073).
- OSTI ID:
- 5293576
- Journal Information:
- Journal of Materials Research; (United States), Journal Name: Journal of Materials Research; (United States) Vol. 6:10; ISSN JMREE; ISSN 0884-2914
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
COPPER COMPOUNDS
COPPER OXIDES
DECOMPOSITION
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELEMENTS
HIGH TEMPERATURE
HIGH-TC SUPERCONDUCTORS
NONMETALS
OXIDES
OXYGEN
OXYGEN COMPOUNDS
PARTIAL PRESSURE
PHYSICAL PROPERTIES
SEEBECK EFFECT
STABILITY
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS
VERY HIGH TEMPERATURE
YTTRIUM COMPOUNDS
YTTRIUM OXIDES
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
COPPER COMPOUNDS
COPPER OXIDES
DECOMPOSITION
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELEMENTS
HIGH TEMPERATURE
HIGH-TC SUPERCONDUCTORS
NONMETALS
OXIDES
OXYGEN
OXYGEN COMPOUNDS
PARTIAL PRESSURE
PHYSICAL PROPERTIES
SEEBECK EFFECT
STABILITY
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS
VERY HIGH TEMPERATURE
YTTRIUM COMPOUNDS
YTTRIUM OXIDES