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Fabrication of superconducting YBa2Cu3O7−x fibers by the sol-gel method using metal alkoxides

Published online by Cambridge University Press:  31 January 2011

Shingo Katayama  and
Masahiro Sekine
Shingo Katayama
Affiliation:
Colloid Research Institute, 350–1 Optra, Yahata-higashi-ku, Kiatakyushu 805, Japan
Masahiro Sekine
Affiliation:
Colloid Research Institute, 350–1 Optra, Yahata-higashi-ku, Kiatakyushu 805, Japan
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Abstract

Superconducting YBa2Cu3O7−x fibers were fabricated by the sol-gel method using modified metal alkoxides. To prepare a heterometallic alkoxide as a precursor of a homogeneous and viscous sol, Y and Cu alkoxides were modified with ethyl acetoacetate (EAA) and ethylenediamine (en), respectively. Their structures were determined by FT-IR and EXAFS. The heterometallic alkoxide was synthesized by partial hydrolysis of the modified alkoxides and was further hydrolyzed and concentrated to obtain a viscous sol. This sol had good spinability and was spun into gel fibers by a spinning apparatus. The gel fibers had a high oxide content of 61 wt.%. The fiber, fired at 950 °C for 10 h in O2, had only closed pores and a dense structure. Tc (onset) of this fiber was 94 K.

Type
Articles
Information
Journal of Materials Research , Volume 6 , Issue 8 , August 1991 , pp. 1629 - 1633
Copyright
Copyright © Materials Research Society 1991

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References

1. Kozuka, H., Umeda, T., Jin, J. S., and Sakka, S., in Better Ceramics Through Chemistry III, edited by Brinker, C. J., Clark, D. E., and Ulrich, D. R. (Mater. Res. Soc. Symp. Proc. 121, Pittsburgh, PA, 1988), p. 639.Google Scholar
2. Sakka, S., Kozuka, H., Umeda, T., and Jin, J., in Proceedings of the MRS International Meeting on Advanced Materials, edited by Kitazawa, K. and Tachikawa, K. (Mater. Res. Soc. Symp. Proc. 6, Pittsburgh, PA, 1989), p. 239.Google Scholar
3. Umeda, T., Kozuka, H., and Sakka, S., Adv. Ceram. Mater. 3 (5), 520 (1988).CrossRefGoogle Scholar
4. Umeda, T., Kozuka, H., and Sakka, S., J. Ceram. Soc. Jpn. 98 (7), 709 (1990).Google Scholar
5. Uchikawa, F., Zheng, H., Chen, K. C., and Mackenzie, J. D., in Extended Abstracts No. 14, High-Temperature Superconductors II, edited by Capone, D. W. II, Butler, W. H., Batlogg, B., and Chu, C. W. (Materials Research Society, Pittsburgh, PA, 1988), p. 89.Google Scholar
6. Uchikawa, F. and Mackenzie, J. D., J. Mater. Res. 4, 787 (1989).CrossRefGoogle Scholar
7. Zheng, H., Chen, K. C., and Mackenzie, J. D., in Extended Abstracts No. 14, High-Temperature Superconductors II, edited by Capone, D. W. II, Butler, W. H, Batlogg, B., and Chu, C. W. (Materials Research Society, Pittsburgh, PA, 1988), p. 93.Google Scholar
8. Katayama, S. and Sekine, M., J. Mater. Res. 5, 683 (1990).CrossRefGoogle Scholar
9. Singh, J. V., Baranwal, B. P., and Mehrotra, R. C., Z. anorg. allg. Chem. 477, 235 (1981).CrossRefGoogle Scholar
10. Uchihashi, H., Tohge, N., and Monami, T., J. Ceram. Soc. Jpn. 97 (3), 396 (1989).Google Scholar
11. Fujita, J., Nakamoto, K., and Kobayashi, M., J. Am. Chem. Soc. 78, 3295 (1956).Google Scholar
12. Brubaker, C. H. Jr and Nicholas, M., J. Inorg. Nucl. Chem. 27, 59 (1965).Google Scholar
13. Bains, M. S. and Bradley, D. C., Can. J. Chem. 40, 2218 (1962).Google Scholar
14. Takahashi, Y. and Naganawa, H., J. Ceram. Soc. Jpn. 95 (11), 1107 (1987).Google Scholar
15. Livage, J., in Better Ceramics Through Chemistry II, edited by Brinker, C. J., Clark, D. E., and Ulrich, D. R. (Mater. Res. Soc. Symp. Proc. 73, Pittsburgh, PA, 1986), p. 717.Google Scholar
16. Paz-Pujalt, G. R., Mehrotra, A. K., Ferranti, S. A., and Agostinelli, J. A., Solid State Ionics 32/33, 1179 (1989).Google Scholar