Friday, 2B-02, 8:45-9:00

Challenges in Long Length Scale Up of High-Performance Coated Conductors in Japan

Yutaka Yamada

Teruo Izumi and Yuh Shiohara, Yasuo Iijima* and Takashi Saitoh*

ISTEC-SRL; Shinonome 1-10-13, Koto-ku, Tokyo, Japan, 135-0062
*Fujikura Lt; 1440, Mutsuzaki, Sakura-shi, Chiba, 285-8550

Challenges in the long length coated conductor by IBAD-PLD method in Japan will be presented. By using IBAD and PLD method, Supreconductivity Research Laboratory (SRL) and Fujikura Ltd. have been developing the long length coated conductor and the thechnologies. This year Fujikura Ltd. achieved 504m GdBCO tape with high Ic of 350A/cm-width. In this achievement, various types of technical challenges were incorporated such as GdBCO and BaZrO₃ artificial pinning center for the material side, PLD-CeO₂ self-epitaxy effect as the new phenomena and the multi-plume multi-turn PLD for the new production technique. These thechniques brought about the large advance in the IBAD-PLD coated conductor in Japan. In these 5 years, Fujikura increased the wire perfoamance of I_cxL by 2 orders. Furthermore, about 6km of total quantity of the coated conductor was delivered from Fujikura and SRL last year to the feasibility studies of the power application such as transformer, cable and mortor.

In this presentation, by referring to the above results up to now and our newly developped IBAD-MgO with more simplified architechtures, we will consider and discuss the challenges needed for the industrial scale production from the material side, the production technology, quality controll, stability and homogeneity controll to satify the application requirement with the minimum cost effort.

This work was supported by New Energy and Industrial Technology Development Organization (NEDO) as the Project for Development of Materials & Power Application of Coated Conductors, M-PACC.

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