Decomposition of YBa sub 2 Cu sub 3 O sub 7 minus x during annealing in CO sub 2 /O sub 2 mixtures
Journal Article
·
· Journal of Materials Research; (USA)
- Materials Science Division, Science and Technology Center for Superconductivity, Argonne National Laboratory, Argonne, IL (USA)
- Materials and Components Technology Division, Science and Technology Center for Superconductivity, Argonne National Laboratory, Argonne, IL (USA)
The stability of YBa{sub 2}Cu{sub 3}O{sub 7{minus}{ital x}} superconductors towards reactions with CO{sub 2} in CO{sub 2}/O{sub 2} gas mixtures has been studied during annealing at temperatures ranging from 600 {degree}C to 950 {degree}C. The results show that there are three different types of the reactions. The reaction products of these reactions all include BaCO{sub 3} and CuO, while the third product is dependent on the annealing temperature. At 600 {degree}C, YBa-carbonates were formed while Y{sub 2}Cu{sub 2}O{sub 5} and Y{sub 2}BaCuO{sub 5} were formed at 815 {degree}C and 950 {degree}C, respectively. Transmission Electron Microscopy images show that the reactions started at grain boundaries with the formation of island-type precipitates.
- Research Organization:
- Argonne National Laboratory (ANL), Argonne, IL
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 6456358
- Journal Information:
- Journal of Materials Research; (USA), Journal Name: Journal of Materials Research; (USA) Vol. 5:7; 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
ANNEALING
BARIUM COMPOUNDS
BARIUM OXIDES
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
COPPER COMPOUNDS
COPPER OXIDES
CRYSTAL STRUCTURE
DECOMPOSITION
ELECTRON MICROSCOPY
ELEMENTS
GRAIN BOUNDARIES
HEAT TREATMENTS
HIGH TEMPERATURE
HIGH-TC SUPERCONDUCTORS
MICROSCOPY
MICROSTRUCTURE
NONMETALS
OXIDES
OXYGEN
OXYGEN COMPOUNDS
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS
TRANSMISSION ELECTRON MICROSCOPY
VERY HIGH TEMPERATURE
YTTRIUM COMPOUNDS
YTTRIUM OXIDES
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ALKALINE EARTH METAL COMPOUNDS
ANNEALING
BARIUM COMPOUNDS
BARIUM OXIDES
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
COPPER COMPOUNDS
COPPER OXIDES
CRYSTAL STRUCTURE
DECOMPOSITION
ELECTRON MICROSCOPY
ELEMENTS
GRAIN BOUNDARIES
HEAT TREATMENTS
HIGH TEMPERATURE
HIGH-TC SUPERCONDUCTORS
MICROSCOPY
MICROSTRUCTURE
NONMETALS
OXIDES
OXYGEN
OXYGEN COMPOUNDS
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS
TRANSMISSION ELECTRON MICROSCOPY
VERY HIGH TEMPERATURE
YTTRIUM COMPOUNDS
YTTRIUM OXIDES