Processing of Y-based coated conductors by TFA-MOD method

Teruo Izumi, Masateru Yoshizumi, Junko Matsuda, Koichi Nakaoka, Yasunori Sutoh, Tatsuhisa Nakanishi, Akinobu Nakai, Masashi Miura, Yutaka Yamada, Tsutomu Koizumi, Yuji Aoki, Akimasa Yajima, Yuh Shiohara

研究成果: Contribution to journalArticle査読


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.

ジャーナルNippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals
出版ステータス出版済み - 11 2007

All Science Journal Classification (ASJC) codes

  • 凝縮系物理学
  • 材料力学
  • 金属および合金
  • 材料化学


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