TY - JOUR
T1 - Influence of calcination conditions on superconducting properties of YBCO coated conductors by advanced TFA-MOD process
AU - Nakaoka, K.
AU - Matsuda, J.
AU - Fuji, H.
AU - Teranishi, R.
AU - Izumi, T.
AU - Shiohara, Y.
AU - Yamada, Y.
AU - Goto, T.
AU - Yajima, A.
N1 - Funding Information:
This work was supported by the New Energy and Industrial Technology Development Organization (NEDO) as Collaborative Research and Development of Fundamental Technologies for Superconductivity Applications.
PY - 2006/10/1
Y1 - 2006/10/1
N2 - We have investigated influences of the H2O gas inlet temperature in the calcination process on both microstructures and superconducting properties of YBCO films fabricated by the advanced TFA-MOD process, from the viewpoint of the process control in the reel-to-reel system. Low Ic values were recognized in the films which were prepared by introducing the H2O gas from the lower temperature than 200 °C. XRD measurements and cross-sectional TEM observations suggest that the YBCO films calcined with the H2O inlet temperature below 200 °C revealed a random orientation without epitaxial growth. Consequently, it has been understood that control to keep low partial pressure of the H2O gas in a lower temperature region is important for fabrication of long-length YBCO tapes with high performance by the reel-to-reel system.
AB - We have investigated influences of the H2O gas inlet temperature in the calcination process on both microstructures and superconducting properties of YBCO films fabricated by the advanced TFA-MOD process, from the viewpoint of the process control in the reel-to-reel system. Low Ic values were recognized in the films which were prepared by introducing the H2O gas from the lower temperature than 200 °C. XRD measurements and cross-sectional TEM observations suggest that the YBCO films calcined with the H2O inlet temperature below 200 °C revealed a random orientation without epitaxial growth. Consequently, it has been understood that control to keep low partial pressure of the H2O gas in a lower temperature region is important for fabrication of long-length YBCO tapes with high performance by the reel-to-reel system.
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U2 - 10.1016/j.physc.2006.06.007
DO - 10.1016/j.physc.2006.06.007
M3 - Article
AN - SCOPUS:33748157023
SN - 0921-4534
VL - 445-448
SP - 545
EP - 548
JO - Physica C: Superconductivity and its applications
JF - Physica C: Superconductivity and its applications
IS - 1-2
ER -