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Journal of Materials Science

, Volume 29, Issue 22, pp 5997–6003 | Cite as

Microstructure and properties of K2O doped superconducting YBa2Cu3O7−x

  • J. Tartaj
  • J. F. Fernandez
  • P. Duran
  • C. Moure
Article
  • 31 Downloads

Abstract

K doped YBa2Cu2Ox powders have been obtained by incorporating K2CO3 to previously coprecipitated amorphous hydroxide mixtures. Synthesis was performed at 900‡C and an orthorhombic 1 2 3 phase was the final product. Sintering of isopressed bars was carried out from 920 to 940‡C. K doping up to 5 at % led to the development of dense bodies with good superconducting behaviour. Oxygen pick-up during the cooling step following sintering was well accomplished despite the high density of the samples. Transition temperatures ⩾90 K were measured. Doping above that percentage led to samples with lower density values. The presence of non-superconducting phases, such as CuO and a green phase, was very significant, and suppressed the superconducting transition.

Keywords

Oxygen Polymer Microstructure Hydroxide Transition Temperature 
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.

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Copyright information

© Chapman & Hall 1994

Authors and Affiliations

  • J. Tartaj
    • 1
  • J. F. Fernandez
    • 1
  • P. Duran
    • 1
  • C. Moure
    • 1
  1. 1.Electroceramics DepartmentInstituto de Ceramica y Vidrio (CSIC)Arganda del ReySpain

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