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Effects of Annealing on Phase Formation and Critical Current Density of Dip-Coated Tl0.5Pb0.5 Sr1.8Yb0.2CaCu2O7 Superconducting Tapes

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Abstract:

In this study, single-core and multi-core Tl1212 tapes were fabricated from Tl-1212 superconducting powder of Tl0.5Pb0.5Sr1.8Yb0.2CaCu2O7 starting composition derived by conventional solid state synthesis. Single core tapes showed maximum Jc and enhanced 1212 phase formation were achieved for tapes annealed at a higher temperature for a longer duration. Multi core tapes showed a general increase in Ic and Jc with the number of tapes core. The highest Jc of 521 A/cm2 was observed for the 4-core tapes annealed at 870 °C for 90 minutes. The initial drastic drop of the tapes Jc in low magnetic fields (≤1T) indicates limitation on tapes performance by weak links. The low Jc of the tapes may be due to the lack of texture in the tapes core as revealed by SEM.

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Periodical:

Materials Science Forum (Volume 517)

Pages:

13-16

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.517.13

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Online since:

June 2006

Authors:

Faizah Md. Salleh, Ahmad K. Yahya, M.H. Ismail, M.H. Jumali

Keywords:

Dip-Coating, Tapes, TI-1212

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© 2006 Trans Tech Publications Ltd. All Rights Reserved

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