Grain growth and the microstructural effects on the properties of YBa2Cu3O7-y superconductor
Creators
- 1. Department of Materials Science and Engineering, Solid State Science Center, University of California, Los Angeles, CA (USA)
Description
The microstructural development and grain growth of YBa2Cu3O7-y ceramics at 925, 950, and 975 degree C were studied. Densification occurred quite rapidly at temperatures below 925 degree C. The grain growth of YBa2Cu3O7-y followed a D5-D05=Kt relation when sintered at 925 and 950 degree C. At 975 degree C, the kinetics changed to cubic (D3) behavior which can be attributed to the formation of a liquid phase at grain boundaries. A trend of decreasing Jc with increasing sintering temperature was observed. Other properties including Tc and the width of the transition were virtually unaffected by the change in microstructure. Without prolonged annealing, a relatively homogeneous oxygen stoichiometry of 6.8 was obtained for fairly dense samples (>93% of theoretical). These results suggest that the oxygenation rate of YBa2Cu3O7-y was quite rapid between the tetragonal phase and the orthorhombic composition of YBa2Cu3O6.8
Additional details
Publishing Information
- Journal Title
- Journal of Materials Research
- Journal Volume
- 5
- Journal Issue
- 9
- Series
- J. Mater. Res.
- Journal Page Range
- 1819-1826
- ISSN
- 0884-2914
- CODEN
- JMREE
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 22022433
- Subject category
- S36: MATERIALS SCIENCE; S36: MATERIALS SCIENCE; S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
- Resource subtype / Literary indicator
- Numerical Data
- Descriptors DEI
- ANNEALING; BARIUM OXIDES; CHEMICAL COMPOSITION; COPPER OXIDES; CRITICAL CURRENT; CURRENT DENSITY; EXPERIMENTAL DATA; GRAIN BOUNDARIES; GRAIN GROWTH; HIGH TEMPERATURE; HIGH-TC SUPERCONDUCTORS; MICROSTRUCTURE; ORTHORHOMBIC LATTICES; STOICHIOMETRY; SUPERCONDUCTIVITY; TETRAGONAL LATTICES; TRANSITION TEMPERATURE; VERY HIGH TEMPERATURE; YTTRIUM OXIDES
- Descriptors DEC
- ALKALINE EARTH METAL COMPOUNDS; BARIUM COMPOUNDS; CHALCOGENIDES; COPPER COMPOUNDS; CRYSTAL LATTICES; CRYSTAL STRUCTURE; CURRENTS; DATA; ELECTRIC CONDUCTIVITY; ELECTRIC CURRENTS; ELECTRICAL PROPERTIES; HEAT TREATMENTS; INFORMATION; NUMERICAL DATA; OXIDES; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; SUPERCONDUCTORS; THERMODYNAMIC PROPERTIES; TRANSITION ELEMENT COMPOUNDS; YTTRIUM COMPOUNDS