The effect of high-temperature treatment of YBCO powder on the microstructure and Jcof YBCO/Ag/Ni tapes
- 1 December 1990
- journal article
- Published by IOP Publishing in Superconductor Science and Technology
- Vol. 3 (12), 587-590
- https://doi.org/10.1088/0953-2048/3/12/003
Abstract
The critical current density of the hot-rolled YBCO composite superconducting tape was remarkably increased by treating YBCO superconducting powder at 1030-1080 degrees C for 0.5-3.0 h. The best Jc value in the present study was 7200 A cm-2 at 77 K. The increase of Jc was attributed to the improvement in the microstructure of the tape, such as twin density, fine '211' phase particles and crystal size. Ag/Ni composite tape was proved to be a more applicable substrate material than Ag or Ni.Keywords
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