Oxygenation characteristics in high-density YBa sub 2 Cu sub 3 O sub x ceramics

Journal Article · Mon Jul 01 04:00:00 EDT 1991 · Journal of Materials Research; (USA)

DOI:https://doi.org/10.1557/JMR.1991.1398· OSTI ID:5742739

Kuwabara, M; Shimooka, H; Katayama, I; Inada, T ^[1]

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1. Department of Applied Chemistry, Kyushu Institute of Technology, Tobata, Kitakyushu 804, Japan (JP)

Oxygenation characteristics in high-density YBa{sub 2}Cu{sub 3}O{sub {ital x}} ceramics with a relative sintered density {ge}97%, which were produced by hot-pressing to have various oxygen contents as-hot-pressed, have been investigated. The results indicate that the oxygenation characteristic in the materials was strongly affected by their oxygen content before oxygenation; that is, the attainable oxygen content (directly connected with the superconducting temperature {ital T}{sub {ital c}}) of the materials after oxygenation increases with a decrease in their oxygen content before oxygenation. Oxygen annealing at 500 {degree}C for 24 h dramatically increased the oxygen content of an YBa{sub 2}Cu{sub 3}O{sub {ital x}} with {ital x}=6.08 before the oxygen annealing up to 6.90, while the oxygen content of an YBa{sub 2}Cu{sub 3}O{sub {ital x}} ceramic with {ital x}=6.32 before oxygenation rose only to a value of 6.61 after the same oxygen annealing. This newly observed phenomenon on the oxygenation characteristic in the present materials may provide an idea for improving the superconducting properties in high-density YBa{sub 2}Cu{sub 3}O{sub {ital x}} ceramics.

• OSTI ID: 5742739
• Journal Information: Journal of Materials Research; (USA), Journal Name: Journal of Materials Research; (USA) Vol. 6:7; ISSN JMREE; ISSN 0884-2914
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360201 -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
360205* -- Ceramics
Cermets
& Refractories-- Corrosion & Erosion
ALKALINE EARTH METAL COMPOUNDS
AMINES
AMMONIUM COMPOUNDS
ANNEALING
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
COPPER COMPOUNDS
COPPER OXIDES
FABRICATION
HEAT TREATMENTS
HIGH-TC SUPERCONDUCTORS
HOT PRESSING
MATERIALS WORKING
ORGANIC COMPOUNDS
OXIDATION
OXIDES
OXYGEN COMPOUNDS
PRESSING
QUATERNARY COMPOUNDS
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES