TY - JOUR
T1 - Processing of Y-based coated conductors by TFA-MOD method
AU - Izumi, Teruo
AU - Yoshizumi, Masateru
AU - Matsuda, Junko
AU - Nakaoka, Koichi
AU - Sutoh, Yasunori
AU - Nakanishi, Tatsuhisa
AU - Nakai, Akinobu
AU - Miura, Masashi
AU - Yamada, Yutaka
AU - Koizumi, Tsutomu
AU - Aoki, Yuji
AU - Yajima, Akimasa
AU - Shiohara, Yuh
PY - 2007/11
Y1 - 2007/11
N2 - The recent progress in the development of TFA-MOD for a long coated conductor is reviewed. The TFA-MOD process is expected as a low cost process to realize the power application using coated conductors. On the effort for high Jc values, the drastic improvement of Jc value was realized by the control of the composition in starting material. Although the same composition as a stoichiometric one of YBa2Cu3O 7 had been used in the previous development, it was found that the shift to Ba-poor composition could make Jc values higher. The composition of Y : Ba : Cu = 1 : 1.5 : 3 has a peak Jc value in the relation of Jc and Ba-ratio. Consequently, an extremely high I c value of 735 A/cm-width (@77 K, self field) was achieved. In the development by the batch system, it had been difficult to obtain high characteristics in the long tape. The problem was addressed by the numerical analysis considering gas flow and reaction in the film. Then, a 200 m tape with End-to-End Ic value of 201 A/cm-width was realized. Based on the above mentioned results, a large facility for 500 m was installed.
AB - The recent progress in the development of TFA-MOD for a long coated conductor is reviewed. The TFA-MOD process is expected as a low cost process to realize the power application using coated conductors. On the effort for high Jc values, the drastic improvement of Jc value was realized by the control of the composition in starting material. Although the same composition as a stoichiometric one of YBa2Cu3O 7 had been used in the previous development, it was found that the shift to Ba-poor composition could make Jc values higher. The composition of Y : Ba : Cu = 1 : 1.5 : 3 has a peak Jc value in the relation of Jc and Ba-ratio. Consequently, an extremely high I c value of 735 A/cm-width (@77 K, self field) was achieved. In the development by the batch system, it had been difficult to obtain high characteristics in the long tape. The problem was addressed by the numerical analysis considering gas flow and reaction in the film. Then, a 200 m tape with End-to-End Ic value of 201 A/cm-width was realized. Based on the above mentioned results, a large facility for 500 m was installed.
UR - http://www.scopus.com/inward/record.url?scp=37749032506&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=37749032506&partnerID=8YFLogxK
U2 - 10.2320/jinstmet.71.1017
DO - 10.2320/jinstmet.71.1017
M3 - Article
AN - SCOPUS:37749032506
VL - 71
SP - 1017
EP - 1023
JO - Nippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals
JF - Nippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals
SN - 0021-4876
IS - 11
ER -