The path for long range conduction in high J{sub c} TlBa{sub 2}Ca{sub 2}Cu{sub 3}O{sub 8+x} spray-pyrolyzed deposits
Book
·
OSTI ID:43027
- Oak Ridge National Lab., TN (United States). Metals and Ceramics Division
- General Electric Corporate R and D, Schenectady, NY (United States)
Grain boundary misorientations and local texture in polycrystalline TlBa{sub 2}Ca{sub 2}Cu{sub 3}O{sub 8+x} deposits prepared by thallination of spray-pyrolyzed precursor deposits on yttria-stabilized zirconia have been determined from transmission electron microscopy, electron backscatter diffraction patterns and x-ray diffraction. The deposits were polycrystalline, had small grains, and excellent c-axis alignment. The deposits contained colonies of grains with similar but not identical a-axis orientations. Most grain boundaries within a colony have small misorientation angles and should not be weak links. It is proposed that long range current flow occurs through a percolative network of small angle grain boundaries at colony intersections.
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 43027
- Report Number(s):
- CONF-9310224--; ISBN 0-87339-271-X
- Country of Publication:
- United States
- Language:
- English
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OSTI ID:5438389