Fabrication of long Y123 coated conductor tape by advanced TFA-MOD process
| Autor: | Toru Izumi, K. Nakaoka, Masaaki Yoshizumi, Akimasa Yajima, T. Nakanishi, Y. Kitoh, Y. Shiohara, Yoshiteru Yamada, Y. Sutoh, Junko Matsuda, Tomotaka Goto |
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| Rok vydání: | 2007 |
| Předmět: |
Copper oxide
High-temperature superconductivity Barium oxide Fabrication Materials science Cationic polymerization Analytical chemistry Energy Engineering and Power Technology Condensed Matter Physics Electronic Optical and Magnetic Materials law.invention Conductor Metal chemistry.chemical_compound chemistry law visual_art visual_art.visual_art_medium Reel-to-reel audio tape recording Electrical and Electronic Engineering |
| Zdroj: | Physica C: Superconductivity and its Applications. :515-518 |
| ISSN: | 0921-4534 |
| DOI: | 10.1016/j.physc.2007.01.040 |
| Popis: | Metal organic deposition (MOD) process of YBa 2 Cu 3 O 7− y (YBCO) using metal trifluoro acetate (TFA) precursors is thought to be promising since YBCO films with high J c can be fabricated by this process inexpensively. However it is difficult to maintain high J c throughout long tapes. We have improved I c values and longitudinal I c distribution for a long coated conductor tape by the advanced TFA-MOD method. It was clarified that a humid atmosphere degraded as-coated films. The Ba-poor composition precursor from the 1:2:3 cationic ratio improved J c / I c significantly. As a result, a 86 m long coated conductor was obtained with I c values higher than 200 A/cm-w throughout the tape except for one small region. Almost of the tape has as high I c as 300 A/cm-w and the end-to-end I c × L value was 14 000 Am ( I c = 250 A, L = 56 m). |
| Databáze: | OpenAIRE |
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