The metal organic deposition (MOD) process of YBa2Cu 3O7-X (YBCO) using metal trifluoroacetate (TFA) precursors is considered to be a strong candidate as a low cost fabrication process in coated conductors since the TFA-MOD process is a non vacuum process and can provide high Jc films. In order to develop long tape conductors using this process, the influence of the gas flow direction in the heat treatment was investigated. The Jc value decreases toward to leeward side in the case of the parallel gas flow condition. On the other hand, in the case of the perpendicular gas flow condition. The Jc value reveals uniformity in all over the tape and the high Jc level is maintained. In the case of long tape production, it was found that the perpendicular gas flow to the tape length is effective to fabricate the uniform films. It could minimize the influence of consumption of H2O and generation of HF gas in the up-stream area to the leeward region. The J c and Ic properties and these distribution of the YBCO tape fabricated by this method on CeO2/IBAD-Gd2Zr 2O7/Hastelloy is presented. Furthermore, a large scale equipment for the continues long tape process was developed based on the above findings. Consequently we have fabricated a 1 m long Y123 tape conductor by a reel to reel system. Even in the first trial, the uniform reaction for the entire length was recognized.
|ジャーナル||Physica C: Superconductivity and its applications|
|出版ステータス||出版済み - 10月 2003|
|イベント||Proceedings of the 15th International Symposium on Superconduc - Yokohama, 日本|
継続期間: 11月 11 2002 → 11月 13 2002
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