TY - JOUR
T1 - Recent progress on R&D of advanced TFA-MOD process for coated conductors
AU - Izumi, Teruo
AU - Matsuda, J. S.
AU - Nakaoka, K.
AU - Kitoh, Y.
AU - Sutoh, Y.
AU - Nalkanishi, T.
AU - Yoshizumi, M.
AU - Yamada, Y.
AU - Shiohara, Y.
N1 - Funding Information:
Manuscript received August 27, 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 - The recent progress in R&D of TFA-MOD process for the coated conductors are reviewed. On the effort towards fabricating high Ic tape, a new process to prevent crack formation in the thick film, which is the intermediate annealing between calcination and crystallization steps, was developed. Additionally, control of the composition from the 123 stoichiometric ratio, especially for Ba-poor composition, is found to be effective to improve Jc values of the films. Consequently, the extremely high Ic value of 692 A was obtained. On the other hand, a reel-to-reel system has been applied to fabricate long tapes. The high Ic value of 250 A/cm-w in a 4 m long tape and the reasonable long tape of 25 m with 100 A/cm-w were obtained. Additionally, it was newly found that the humidity control to be low PH2O in the coating room is effective to suppressing the degradation of the Jc characterization.
AB - The recent progress in R&D of TFA-MOD process for the coated conductors are reviewed. On the effort towards fabricating high Ic tape, a new process to prevent crack formation in the thick film, which is the intermediate annealing between calcination and crystallization steps, was developed. Additionally, control of the composition from the 123 stoichiometric ratio, especially for Ba-poor composition, is found to be effective to improve Jc values of the films. Consequently, the extremely high Ic value of 692 A was obtained. On the other hand, a reel-to-reel system has been applied to fabricate long tapes. The high Ic value of 250 A/cm-w in a 4 m long tape and the reasonable long tape of 25 m with 100 A/cm-w were obtained. Additionally, it was newly found that the humidity control to be low PH2O in the coating room is effective to suppressing the degradation of the Jc characterization.
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U2 - 10.1109/TASC.2007.899562
DO - 10.1109/TASC.2007.899562
M3 - Article
AN - SCOPUS:34547500330
SN - 1051-8223
VL - 17
SP - 3329
EP - 3331
JO - IEEE Transactions on Applied Superconductivity
JF - IEEE Transactions on Applied Superconductivity
IS - 2
ER -