TY - JOUR
T1 - Optimization of process parameters for calcination in TFA-MOD method
AU - Nakaoka, K.
AU - Matsuda, J.
AU - Yoshizumi, M.
AU - Goto, T.
AU - Yamada, Y.
AU - Izumi, T.
AU - Shiohara, Y.
N1 - Funding Information:
Manuscript received August 29, 2006. 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 - 2007/6
Y1 - 2007/6
N2 - We have investigated the influence of the H2O vapour inlet temperature in the calcination on both the microstructure and superconducting properties of YBa2Cu3O7-x (YBCO) films fabricated by the TFA-MOD method, from the viewpoint of the process control In the reel-to-reel system. Low critical current (Ic) values were obtained in the films prepared by introducing the H2O vapour at temperatures less than 200°C. XRD measurements and cross-sectional TEM observations suggest that the YBCO films calcined with the H2O vapour inlet temperature below 200°C revealed a random orientation without the epitaxial growth of the YBCO phase grains. Consequently, it is necessary to introduce H2O vapour from temperatures higher than 250°C in calcination for fabrication of high performance YBCO tapes. In reel-to-reel system, it is important that the humidity management in a low temperature range in the furnace.
AB - We have investigated the influence of the H2O vapour inlet temperature in the calcination on both the microstructure and superconducting properties of YBa2Cu3O7-x (YBCO) films fabricated by the TFA-MOD method, from the viewpoint of the process control In the reel-to-reel system. Low critical current (Ic) values were obtained in the films prepared by introducing the H2O vapour at temperatures less than 200°C. XRD measurements and cross-sectional TEM observations suggest that the YBCO films calcined with the H2O vapour inlet temperature below 200°C revealed a random orientation without the epitaxial growth of the YBCO phase grains. Consequently, it is necessary to introduce H2O vapour from temperatures higher than 250°C in calcination for fabrication of high performance YBCO tapes. In reel-to-reel system, it is important that the humidity management in a low temperature range in the furnace.
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U2 - 10.1109/TASC.2007.898917
DO - 10.1109/TASC.2007.898917
M3 - Article
AN - SCOPUS:34547451088
SN - 1051-8223
VL - 17
SP - 3313
EP - 3316
JO - IEEE Transactions on Applied Superconductivity
JF - IEEE Transactions on Applied Superconductivity
IS - 2
ER -