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 |
|---|---|
| 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 |
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Keywords
- Coarsening
- Fine dispersion
- J
- Nd-123
- Nd-422
- T
ASJC Scopus subject areas
- Electrical and Electronic Engineering
- Physics and Astronomy (miscellaneous)
Cite this
Refinement of Nd-422 particles in Nd-Ba-Cu-O bulk superconductor. / Iida, K.; Yoshioka, J.; Murakami, Masato.
In: IEEE Transactions on Applied Superconductivity, Vol. 11, No. 1 III, 03.2001, p. 3529-3532.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Refinement of Nd-422 particles in Nd-Ba-Cu-O bulk superconductor
AU - Iida, K.
AU - Yoshioka, J.
AU - Murakami, Masato
PY - 2001/3
Y1 - 2001/3
N2 - 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.
AB - 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.
KW - Coarsening
KW - Fine dispersion
KW - J
KW - Nd-123
KW - Nd-422
KW - T
UR - http://www.scopus.com/inward/record.url?scp=0035269061&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0035269061&partnerID=8YFLogxK
U2 - 10.1109/77.919825
DO - 10.1109/77.919825
M3 - Article
VL - 11
SP - 3529
EP - 3532
JO - IEEE Transactions on Applied Superconductivity
JF - IEEE Transactions on Applied Superconductivity
SN - 1051-8223
IS - 1 III
ER -