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Preparation of high Tc Tl–Ba–Ca–Cu oxide superconducting filament by suspension spinning method

Published online by Cambridge University Press:  31 January 2011

Tomoko Goto
Tomoko Goto
Affiliation:
Department of Materials Science and Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya 466, Japan
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Abstract

High Tc Tl–Ba–Ca–Cu–O (A) and Tl–Ba–Sr–Ca–Cu–O (B) superconducting filaments were successfully prepared using a technique in which suspension spun and pyrolyzed filaments were densified by pressing and sintering. A zero resistance state was achieved at 112 K and 106 K, and the maximum Jc at 77 K, 0 T was 1200 A/cm2 and 2300 A/cm2 for Tl–Ba–Ca–Cu–O (A) and Tl–Ba–Sr–Ca–Cu–O (B) filaments, respectively. Although the starting powder had a high Tc phase of Tl2Ba2Ca2Cu3Ox, the structure of the filament with high Jc was a high Tc phase of Tl1Ba2Ca2Cu3Ox, due to the volatility of Tl oxide from the large surface area of the filament.

Type
Materials Communications
Information
Journal of Materials Research , Volume 5 , Issue 12 , December 1990 , pp. 2759 - 2761
Copyright
Copyright © Materials Research Society 1990

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