Development of high-Ic processing for low cost YBCO coated conductors by multi-turn reel-to-reel crystallization large furnace for TFA-MOD process

被引：6

作者：

Takagi, Y. ^{[1
]}

Takahashi, Y. ^{[1
]}

Nakaoka, K. ^{[1
]}

Yoshizumi, M. ^{[1
]}

Akagi, N. ^{[1
]}

Takahashi, S. ^{[1
]}

Izumi, T. ^{[1
]}

Shiohara, Y. ^{[1
]}

机构：

[1] ISTEC, Superconduct Res Lab, Koto Ku, 10-13 Shinonome,1 Chome, Tokyo 1350062, Japan

来源：

ADVANCES IN SUPERCONDUCTIVITY XXIV | 2012年 / 27卷

关键词：

YBCO; TFA-MOD; growth rate; interim annealing;

D O I：

10.1016/j.phpro.2012.03.445

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Trifluoroacetates (TFA)-metal organic deposition (MOD) derived YBCO coated conductors are expected for many applications mainly due to cost-efficiency. High I-c and production rate are required for cost reduction in terms of $/Am. Improvement of I-c performance and production rate has been studied in this work, focusing on the conversion process of TFA-MOD. YBCO precursor films with desired thickness were prepared by using the multi-turn reel-to-reel (RTR)-system of dip-coating and calcination. The precursor films were heat treated under different conditions including the interim annealing. Crystallization process was performed on the interim annealed samples by using a multi-turn RTR system. The conversion furnace was modified so that improved conditions such as higher gas flow rate, lower total pressure can be used, which improved the production rate in crystallization process to 15 m/h by accelerating YBCO growth rate. Adopting the interim annealing, I-c property increased about 30 % compared with that prepared without the interim annealing. X-ray theta-2 theta diffraction analysis showed that; the peak intensities of YBCO (005) in interim annealed samples were 1.5 times stronger compared with those prepared without the interim annealing. The interim annealing affected the crystallinity and microstructure, resulting in high I-c. Then, the improved process for crystallization was applied to long tapes fabrication. A 205 m-long YBCO coated conductors fabricated at 15 m/h with interim annealing showed high and uniform I-c performance throughout the tape; I-c(min.)=372 A/cm-w@77 K, s.f., standard deviation = 15.2 A (3.7%). Uniformity along transverse direction was also analyzed by striating a 54 m long tape (199.5 A/5 mm-widths) into 5 filaments and, the I-c value of each filament (1 mm-width) was confirmed to be uniform; 24.3-32.9 A. (C) 2012 Published by Elsevier B.V. Selection and/or peer-review under responsibility of ISS Program Committee

引用

页码：200 / 203

页数：4

共 5 条

[1] Research and development of reel-to-reel TFA-MOD process for coated conductors
Izumi, T.
Yoshizumi, M.
Miura, M.
Sutoh, Y.
Nakanishi, T.
Nakai, A.
Ichikawa, Y.
Yamada, Y.
Goto, T.
Yajima, A.
Aoki, Y.
Hasegawa, T.
Shiohara, Y.
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 2008, 468 (15-20): : 1527 - 1530
[2] Development of multi-turn reel-to-reel crystallization large furnace for high production rate of YBa2Cu3Oy coated conductors derived from TFA-MOD process
Miura, M.
Ichikawa, H.
Sutoh, Y.
Nakaoka, K.
Yoshizumi, M.
Yamada, Y.
Izumi, T.
Shiohara, Y.
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 2009, 469 (15-20): : 1336 - 1340
[3] High-Ic processing for YBCO coated conductors by TFA-MOD process
Teranishi, R
Matsuda, J
Nakaoka, K
Fuji, H
Aoki, Y
Kitoh, Y
Nomoto, S
Yamada, Y
Yajima, A
Izumi, T
Shiohara, Y
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 2005, 426 : 959 - 965
[4] Present status and strategy of reel-to-reel TFA-MOD process for coated conductors
Izumi, T.
Yoshizumi, M.
Miura, M.
Nakaoka, K.
Ichikawa, Y.
Sutoh, Y.
Miyata, S.
Fukushima, H.
Yamada, Y.
Shiohara, Y.
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 2009, 469 (15-20): : 1322 - 1325
[5] Fabrication of 10-m class Y-123 coated conductors using continuous reel-to-reel process by TFA-MOD method
Aoki, Y
Teranishi, R
Kitoh, Y
Fuji, H
Nakaoka, K
Koyama, T
Matuda, JS
Izumi, T
Shiohara, Y
Tokunaga, Y
Yamada, Y
Goto, T
Yajima, A
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 2005, 426 : 945 - 948

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