Advertisement

Journal of Materials Science

, Volume 29, Issue 16, pp 4260–4267 | Cite as

Plasma-enhanced fluorination of YBa2Cu3O7−δ ceramics

Part II Interaction mechanisms between the reactive species and the materials
  • C. Magro
  • A. Tressaud
  • N. Hudáková
  • J. Etournau
  • C. Cardinaud
  • G. Turban
Papers

Abstract

Mechanisms of interaction between the reactive species of a (CF4+O2) plasma and YBa2Cu3O7−δ ceramics have been proposed through detailed angle-resolved X-ray photoelectron spectroscopic analyses. At the surface of the outer grains, the plasma treatment removes (OH) and (CO3)2− species contained in the degradation layer and gives rise to a fluoride-rich layer, whereas in the bulk of the material the occurrence of metal-fluorine bonds in the superconducting phase has been assumed. An increase of the oxidation state of copper has been also detected, confirming the oxidizing effect of the plasma treatment. A comparison with the oxidation mechanisms obtained by fluorine gas treatment is proposed.

Keywords

Oxidation Polymer Copper Spectroscopic Analysis Fluorine 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    C. MAGRO, A. TRESSAUD, N. HUDAKOVA, L. LOZANO, C. CARDINAUD and G. TURBAN, J. Mater. Sci. 29 (1994) in press.Google Scholar
  2. 2.
    A. Tressaud, B. Chevalier, B. Lepine, J. M. Dance, L. Lozano, J. Grannec, J. Etourneau, R. Tournier, A. Sulpice and P. Lejay, Mod. Phys. Lett. B2 (1988) 1183.CrossRefGoogle Scholar
  3. 3.
    W. Herzog, M. Schwarz, H. Sixl and R. Hoppe, Z. Phys. B71 (1988) 19.CrossRefGoogle Scholar
  4. 4.
    S. Myhra, J. C. Riviere, A. M. Steward and P. C. Healy, ibid. B72 (1988) 413.CrossRefGoogle Scholar
  5. 5.
    R. P. Vasquez, M. C. Foote and B. D. Hunt, J. Appl. Phys. 66 (1989) 4866.CrossRefGoogle Scholar
  6. 6.
    H. Touhara, Y. Goto, N. Watanabe, K. Imaeda, T. Enoki, H. Inokuchi and Y. Mizutani, Synth. Met. 23 (1988) 461.CrossRefGoogle Scholar
  7. 7.
    J. Etourneau, J. Portier and F. Menil, J. Alloys Compounds 188 (1992) 1.CrossRefGoogle Scholar
  8. 8.
    P. C. Healy, S. Myhra and A. M. Steward, Philos. Mag. B58 (1988) 257.CrossRefGoogle Scholar

Copyright information

© Chapman & Hall 1994

Authors and Affiliations

  • C. Magro
    • 1
  • A. Tressaud
    • 1
  • N. Hudáková
    • 1
  • J. Etournau
    • 1
  • C. Cardinaud
    • 2
  • G. Turban
    • 2
  1. 1.Laboratoire de Chimie du Solide du CNRSUniversité de Bordeaux ITalence CedexFrance
  2. 2.Institut des Matériaux de NantesNantes Cedex 03France

Personalised recommendations