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Aging and environmental effects on YBa2Cu3O6.95 superconductor

  • S. A. Siddiqi
  • Z. M. Pirzada
  • A. Mateen
Materials Processing
  • 26 Downloads

Abstract

The effect of aging and environmental degrading on a YBa2Cu3O6.95 ceramic superconductor has been studied by x-ray diffraction, scanning electron microscopy, infrared spectroscopy, and electrical resistivity measurements. The superconductor prepared by solid state reaction was well characterized and then exposed to the normal laboratory environment for more than three years. The material showed substantial microstructural degradation with a small decrease in the transition temperature from normal to superconducting state (Tc). IR spectroscopy reveals the presence of water and carbonate. The damage in oxygen content can be restored by reannealing in oxygen for about six hours at 470 °C, but the restoration of exactly the same microstructural and electrical characteristics is not possible.

Keywords

aging cuprates high-temperature superconductors x-ray diffraction 

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References

  1. 1.
    J.R. Ashburn, and C.J. Tong,Phys. Rev. Lett., Vol 58, 1987, p 908CrossRefGoogle Scholar
  2. 2.
    K.G. Frase, E.G. Liniger, and D.R. Clarke,Adv. Ceram. Mater, Vol 2(No.3B), 1987, p 698CrossRefGoogle Scholar
  3. 3.
    J.G. Thompson, B.G. Hyde, R.L. Withers, J.S. Anderson, J.D. Fitz Gerald, J. Bitmead, M.S. Paterson, and A.M. Stewart,Mater Res. Bull.,Vol 22, 1987, p 1715CrossRefGoogle Scholar
  4. 4.
    J. Wang, R. Stevens, and J. Bultitude,J. Mater Sci., Vol 23,1988, p 3393CrossRefGoogle Scholar
  5. 5.
    B.S.B. Karunaratne and M.H. Lewis,Br Ceram. Trans. J., Vol 88, 1989, p 33Google Scholar
  6. 6.
    H. Yang, W. Liu, M. Wu, and Y Fu,Chin. J. Low Temp. Phys., Vol 12 (No. 2), 1990, p 140Google Scholar
  7. 7.
    S.A. Siddiqi and K. Hussain,J. Nat. Sci. Math, Vol 28 (No. 1), 1988, p 19Google Scholar
  8. 8.
    E. Babic, M. Prester, Z. Marohnic, T. Car, N. Biskup, and S.A. Siddiqi,Solid State Commun., Vol 72 (No. 8), 1989, p 753CrossRefGoogle Scholar
  9. 9.
    E. Babic, M. Prester, Z. Marohnic, and S.A. Siddiqi,Phys. Rev. B, Vol 41 (No. 10), 1990, p 6278CrossRefGoogle Scholar
  10. 10.
    S.M. Arora, VH. Desai, and K.B. Sundaram,J. Mater Sci.,Vol 28, 1993, p 454CrossRefGoogle Scholar

Copyright information

© ASM International 1995

Authors and Affiliations

  • S. A. Siddiqi
    • 1
  • Z. M. Pirzada
    • 1
  • A. Mateen
    • 2
  1. 1.Centre For Solid State PhysicsThe Punjab UniversityLahorePakistan
  2. 2.Institute of Chemical Engineering and TechnologyThe Punjab UniversityLahorePakistan

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