Abstract
We have investigated the effect of oxygen partial pressure, the initial composition, and the addition of CeO2 and/or Pt on the grain growth of Nd4Ba2Cu2O10 (Nd-422) in the Ba-Cu-O liquid. Logarithmic plots of the mean diameter of Nd-422 under various oxygen levels as a function of the holding time showed the power law behavior with the slope of 1/3, which suggested that the grain growth of Nd-422 could be explained in terms of the Ostwald ripening theory. A reduction of oxygen partial pressure, the shift of the initial composition toward Barich direction, and a combined addition of Pt and CeO2 could suppress the coarsening of Nd-422. Furthermore, a combination of these techniques was found to be effective in refining the Nd-422 in the Nd-123 matrix, which led to an enhancement of Jc values.
Original language | English |
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Pages (from-to) | 3529-3532 |
Number of pages | 4 |
Journal | IEEE Transactions on Applied Superconductivity |
Volume | 11 |
Issue number | 1 III |
DOIs | |
Publication status | Published - 2001 Mar |
Externally published | Yes |
Event | 2000 Applied Superconductivity Conference - Virginia Beach, VA, United States Duration: 2000 Sep 17 → 2000 Sep 22 |
Keywords
- Coarsening
- Fine dispersion
- J
- Nd-123
- Nd-422
- T
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Electrical and Electronic Engineering