EPD Superconductor Film with Submicron YBCO on Ag Alloy

  • Soh, Dea-Wha (Dept. Electronic Eng., College of Eng., Myongji University) ;
  • Fan, Zhanguo (School of Materials and Metallurgy, Northeastern University) ;
  • Jeon, Yong-Woo (Dept. of Electronic Eng., Sungduck College)
  • Published : 2006.12.31

Abstract

The submicron $YBa_2Cu_3O_x$ powder was prepared by the sol-gel method. The particle size is distributed from 0.2 to 1.0 ${\mu}m$, which benefits to eliminate the micro-cracks formed in the $YBa_2Cu_3O_x$ films deposited by electrophoresis. The powder was single phase of $YBa_2Cu_3O_x$ examined by X-ray diffraction. In the sol-gel process the citrate gel was formed from citric acid and nitrate solution of $Y_2O_3$, $Ba(NO_3)_2$ and CuO. When pH values were adjusted to 6.4-6.7, $Ba(NO_3)_2$ could be dissolved in the citrate solution completely. Appropriate evaporative temperature of the sol-gel formation is discussed. Acetone is used as electrophoreticsolution, in which some water and iodine (0.2 g/1) and polyethylene glycol (2 vol. %) are added. The concentrations of $YBa_2Cu_3O_x$ powders is 20g/l. The thickness of deposited film could be more than 50 ${\mu}m$ in 3 minutes of depositing time. The most EPD films could be 90K zero resistance and the Jc values were over 1000A/cm2 (0 H, 77 K).

Keywords

References

  1. Y. Iijima, M.Hosaka, N. Tanabe, et al, J. Mater. Res. 12 (1997) 2913 https://doi.org/10.1557/JMR.1997.0386
  2. X.D. Wu, S.R. Foltyn, P.N. Arendt, at al, Appl. Phys. Lett. 67 (1995) 2397 https://doi.org/10.1063/1.114559
  3. H.C. Freyhardt, J. Hoffermann, et al, Appl. Supercond. 4 (1998) 435 https://doi.org/10.1016/S0964-1807(97)00030-6
  4. M Fukutomi, S. Aoki, et al, Physica C 219 (1994) 333 https://doi.org/10.1016/0921-4534(94)90385-9
  5. A. Goyal, D.P. Norton, et al, J. Mater. Res. 12 (1997) 2924 https://doi.org/10.1557/JMR.1997.0387
  6. K. Matsumoto, Y. Niiori, et al, in: K. Osamura, (Eds.), Adv. Superconductivity, X Springer, Tokyo, 1998, p. 611
  7. K. Matsumoto, S. B. Kim, et al, IEEE Trans. Appl. Supercond. (1999) 1539
  8. V. Selvamanickam, G. B. Galinski, et al, Physica C, 333(2000) 155-162 https://doi.org/10.1016/S0921-4534(00)00231-8
  9. J. Wang, F. H. Li, D. H. Soh, Z. G. Fan, J. The Chinese Rare Earth Society, 20, special Issue (2002) 237