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