Abstract
YBa2Cu3Ox superconductors prepared by the sinter method were heated for various times at temperatures from 1273 to 2241 K in alumina, platinum and iridium crucibles, and then their contents were press-quenched between two copper plates. Phases formed in the press-quenched samples were indentified by means of SEM, EPMA and X-ray diffractometry. YBa2Cu3Ox. decomposed into Y2BaCuO5. BaCuO2 and an unknown phase at 1293 K. BaCuO2 was unstable at higher temperatures than 1373 K. Y2BaCuO5 decomposed into Y2O3 and a liquid phase at 1423 K and Y2O3 was stable in the temperature range from 1423 to 2241 K. Iridium crucible was most useful for the heat treatment of the Y-Ba-Cu-O system at the high temperatures.
Original language | English |
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Pages (from-to) | 317-321 |
Number of pages | 5 |
Journal | Materials Transactions, JIM |
Volume | 31 |
Issue number | 4 |
DOIs | |
State | Published - 1990 |
Keywords
- YBaCuO
- iridium crucible
- molten oxide
- phase decomposition microstructure
- superconductor
ASJC Scopus subject areas
- General Engineering