Hyper- and hypobaric processing of Tl-Ba-Ca-Cu-O superconductors

Conference · Wed Nov 01 00:00:00 EST 1989

OSTI ID:5179786

Goretta, K C; Routbort, J L; Shi, Donglu; Chen, J G; Hash, M C

Tl-based superconductors of initial composition Tl:Ca:Ba:Cu equal to 2:2:2:3 and 1:3:1:3 were heated in oxygen at pressures of 10{sup 4} to 6 {times} 10{sup 5} Pa. The 2:2:2:3 composition formed primarily the 2-layer superconductor with zero resistance from 77 to 104 K. The 1:3:1:3 composition formed nearly phase pure 3-layer superconductor with a maximum zero resistance temperature of 120 K. Application of hyperbaric pressure influenced phase purities and transition temperatures slightly; phase purities decreased significantly with application of hypobaric pressures. 10 refs., 1 fig.

• Research Organization: Argonne National Lab. (ANL), Argonne, IL (United States)
• Sponsoring Organization: DOE/CE; DOE/ER
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 5179786
• Report Number(s): CONF-891119-70; ON: DE90005637
• Resource Relation: Conference: Materials Research Society fall meeting, Boston, MA (USA), 27 Nov - 2 Dec 1989
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BARIUM OXIDES
PROCESSING
CALCIUM OXIDES
COPPER OXIDES
PRESSURE EFFECTS
THALLIUM OXIDES
CHEMICAL COMPOSITION
OXYGEN
SUPERCONDUCTORS
SYNTHESIS
TRANSITION TEMPERATURE
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
CALCIUM COMPOUNDS
CHALCOGENIDES
COPPER COMPOUNDS
ELEMENTS
NONMETALS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
THALLIUM COMPOUNDS
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
360201* - Ceramics
Cermets
& Refractories- Preparation & Fabrication