Abstract
It was shown that a single phase YBa2Cu4O8 (124-phase) could be formed from gels at 1 atm oxygen pressure, and the mechanism of its formation was elucidated. It was found that there are two key routes for the sol-gel formation of the 124-phase, one involving the tetragonal YBa2Cu3Oy with a low concentration of oxygen defects (tetra-I phase) and the other involving the Ba2Cu3O5.9 as important intermediates of the 124-phase. The rapid formation of these intermediate compounds from the gel was attributed to the small particle size of the oxides and carbonates precipitating at the initial stage of heating. It was thought that the small particles characteristic of sol-gel processing lead to the rapid formation of the intermediate compounds and subsequent precipitation of the 124-phase.
| Original language | English |
|---|---|
| Pages (from-to) | 133-140 |
| Number of pages | 8 |
| Journal | Journal of Sol-Gel Science and Technology |
| Volume | 1 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 1994 Jan |
| Externally published | Yes |
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Keywords
- acetate gel
- formation mechanism
- superconductor
- YBaCuO
- YBaCuO
ASJC Scopus subject areas
- Ceramics and Composites
Cite this
Mechanism of formation of YBa2Cu4O8 superconductor in the sol-gel synthesis. / Fujihara, Shinobu; Kozuka, Hiromitsu; Yoko, Toshinobu; Sakka, Sumio.
In: Journal of Sol-Gel Science and Technology, Vol. 1, No. 2, 01.1994, p. 133-140.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Mechanism of formation of YBa2Cu4O8 superconductor in the sol-gel synthesis
AU - Fujihara, Shinobu
AU - Kozuka, Hiromitsu
AU - Yoko, Toshinobu
AU - Sakka, Sumio
PY - 1994/1
Y1 - 1994/1
N2 - It was shown that a single phase YBa2Cu4O8 (124-phase) could be formed from gels at 1 atm oxygen pressure, and the mechanism of its formation was elucidated. It was found that there are two key routes for the sol-gel formation of the 124-phase, one involving the tetragonal YBa2Cu3Oy with a low concentration of oxygen defects (tetra-I phase) and the other involving the Ba2Cu3O5.9 as important intermediates of the 124-phase. The rapid formation of these intermediate compounds from the gel was attributed to the small particle size of the oxides and carbonates precipitating at the initial stage of heating. It was thought that the small particles characteristic of sol-gel processing lead to the rapid formation of the intermediate compounds and subsequent precipitation of the 124-phase.
AB - It was shown that a single phase YBa2Cu4O8 (124-phase) could be formed from gels at 1 atm oxygen pressure, and the mechanism of its formation was elucidated. It was found that there are two key routes for the sol-gel formation of the 124-phase, one involving the tetragonal YBa2Cu3Oy with a low concentration of oxygen defects (tetra-I phase) and the other involving the Ba2Cu3O5.9 as important intermediates of the 124-phase. The rapid formation of these intermediate compounds from the gel was attributed to the small particle size of the oxides and carbonates precipitating at the initial stage of heating. It was thought that the small particles characteristic of sol-gel processing lead to the rapid formation of the intermediate compounds and subsequent precipitation of the 124-phase.
KW - acetate gel
KW - formation mechanism
KW - superconductor
KW - YBaCuO
KW - YBaCuO
UR - http://www.scopus.com/inward/record.url?scp=25844520942&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=25844520942&partnerID=8YFLogxK
U2 - 10.1007/BF00490243
DO - 10.1007/BF00490243
M3 - Article
VL - 1
SP - 133
EP - 140
JO - Journal of Sol-Gel Science and Technology
JF - Journal of Sol-Gel Science and Technology
SN - 0928-0707
IS - 2
ER -