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Bulletin of Materials Science

, Volume 18, Issue 5, pp 517–529 | Cite as

Preparation and characterization of silver clad (Bi, Pb)-Sr-Ca-Cu-O 2223 superconducting tapes with high critical current density

  • U Syamaprasad
  • M S Sarma
  • A R Sheeja Nair
  • P Guruswamy
  • P S Mukherjee
  • J Koshy
  • A D Damodaran
Article

Abstract

Silver clad Bi-2223 tapes with consistently high critical current densities of over 30,000 A/cm2 at 77 K and zero field were prepared by powder-in-tube (PIT) technique. Powder XRD, electron microscopy, a.c. susceptibility and critical current measurements were used to study the phase assemblage, microstructure and transport properties of these tapes at various stages of processing. The precursor powder for PIT process was prepared by a sol-gel route by acrylate method using freshly prepared nitrates of Bi, Pb, Sr, Ca and Cu. The carbon content in the powder was minimized by subjecting it under dynamic vacuum calcination followed by heating in free flow of oxygen for long durations with intermittent grindings. The choice of initial stoichiometry, high reactivity of the precursor, effective removal of carbon, choice of phase assemblage at the filling stage and the multistage thermomechanical processing at optimized conditions were found to be responsible for the high critical current density.

Keywords

HighTc superconductor tapes Bi-2223 PIT process critical current density 

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References

  1. Damodaran A Det al 1994Proc. Symp. on long lengths of superconductors, Pittsburgh, Pennsylvania (eds) U Balachandran, E W Collings and A Goyal (Pennsylvania: The Minerals, Metals and Materials Society) pp 61–69Google Scholar
  2. Heine K, Tenbrink J and Thoner M 1993Appl. Phys. Lett. 55 2441CrossRefGoogle Scholar
  3. Kamakura H, Togano K, Maeda H and Mimura M 1990J. Appl. Phys. 67 3443CrossRefGoogle Scholar
  4. Kase J, Irisava N, Morimoto T, Togano K, Kumakura H, Dietderich D R and Maeda H 1990Appl. Phys. Lett. 56 970CrossRefGoogle Scholar
  5. Kase J, Morimoto T, Togano K, Kumakura H, Dietderich D R and Maeda H 1991IEEE Trans. Magn. MAG-27 1254CrossRefGoogle Scholar
  6. Martin S, Fiory A T, Fleming R M, Scheemeyer L F and Waszcak J V 1988Phys. Rev. Lett. 60 2194CrossRefGoogle Scholar
  7. Ming Yang, Goringe M J, Grovenor C R M, Jenkins R and Jones H 1994Supercond. Sci. Technol. 7 378CrossRefGoogle Scholar
  8. Nomura K, Seido M, Kitaguchi H, Kumakura H, Togano K and Maeda H 1993Appl. Phys. Lett. 63 2131CrossRefGoogle Scholar
  9. Sato K, Shibut N, Muka H, Hikata T, Ueyama M, Kato T and Fujikami J 1993Cryogenics 33 243CrossRefGoogle Scholar
  10. Shimoyama J I, Morimoto T, Kitaguchi H, Kumakura H, Togano K, Maeda H, Nomura K and Seido M 1992Jpn. J. Appl. Phys. 31 L163Google Scholar
  11. Simon A, Mukherjee P S, Sarma M S and Damodaran A D 1994J. Mater. Sci. 29 5059CrossRefGoogle Scholar
  12. Sun-li Huanget al 1995Supercond. Sci. Technol. 8 32CrossRefGoogle Scholar
  13. Wang L N, Zakharchenko I V, Muhammed M, Xu J H, Grishin A M, Rao K V and Balachandran U 1995Supercond. Sci. Technol. 8 94CrossRefGoogle Scholar
  14. Yang Ling Chen and Roland Stevens 1992aJ. Am. Ceram. Soc. 73 1142Google Scholar
  15. Yang Ling Chen and Ronald Stevens 1992bJ. Am. Ceram. Soc. 75 1150CrossRefGoogle Scholar
  16. Zhang W and Hellstrom E E 1994Physica C234 137Google Scholar

Copyright information

© The Indian Academy of Sciences 1995

Authors and Affiliations

  • U Syamaprasad
    • 1
  • M S Sarma
    • 1
  • A R Sheeja Nair
    • 1
  • P Guruswamy
    • 1
  • P S Mukherjee
    • 1
    • 2
  • J Koshy
    • 1
  • A D Damodaran
    • 1
  1. 1.Regional Research Laboratory (CSIR)TrivandrumIndia
  2. 2.Regional Research Laboratory (CSIR)BhubaneswarIndia

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