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Journal of Applied Sciences
  Year: 2008 | Volume: 8 | Issue: 12 | Page No.: 2312-2317
DOI: 10.3923/jas.2008.2312.2317
 
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Influence of Complexing Agent in Tl-Containing Sol-Gel Derived Precursor on Critical Temperature Enhancement of Tl0.5Pb0.5Sr1.8Yb0.2CaCu2O7 Superconductor

E.S. Marsom, A.K. Yahya, N.A. Hamid, Z. Awang and I. Hamadneh

Abstract:
Superconducting oxide ceramics of composition Tl0.5Pb0.5Sr1.8Yb0.2CaCu2O7 was prepared by using a single-step sol-gel process using two different complexing agents (tartaric acid and citric acid). The effect of the complexing agents (0.0-11.0% (w/w %)) on superconductivity of the samples were studied. It was found that the values of critical temperature, Tc zero, was enhanced from 88 K (for the sample without any complexing agents) to 95 K (for sample with 11 w/w % tartaric acid) and 97 K (for sample with 11 w/w% citric acid). SEM analysis showed formation of ultra-fine grains with 1-2 μm average grains size for the sample without complexing agents. Addition of the complexing agents induced growth of elongated grains of 5-10 μm in average length. The Tc enhancement was discussed in terms of changes in hole concentration and sample microstructure as a result of use of the complexing agents.
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How to cite this article:

E.S. Marsom, A.K. Yahya, N.A. Hamid, Z. Awang and I. Hamadneh, 2008. Influence of Complexing Agent in Tl-Containing Sol-Gel Derived Precursor on Critical Temperature Enhancement of Tl0.5Pb0.5Sr1.8Yb0.2CaCu2O7 Superconductor. Journal of Applied Sciences, 8: 2312-2317.

DOI: 10.3923/jas.2008.2312.2317

URL: https://scialert.net/abstract/?doi=jas.2008.2312.2317

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