Synthesis and densification behaviour of Bi-based superconducting powder by organic precursor

Anna Tampieri, G. Celotti

Research output: Contribution to journalArticle

Abstract

BSCCO (2223) phase superconducting powder was synthesized by pyrolysis of a solution of citrates containing cations in the relative amounts required to prepare compounds with the nominal composition Bi1.84Pb0.35Sr1.9Ca2.1Cu3Ox Starting from the pyrolysed precursor, the preparation of (2 223) monophasic powder is realized in very short processing time of only 24 h. Reactions among components were investigated by thermogravimetric and differential thermal analysis; the products obtained on treating powders at various temperatures in the range 500-950 °C were defined by XRD. The identification of the reaction intermediates that play a crucial role in the synthetic process was systematically performed, and a comparison with the solidstate reaction method was carried out. Hot pressing was performed in order to prepare highly dense superconducting materials. The densification behaviour of the powder obtained by the citrate route was studied in comparison with the solid-state reacted one.

Original languageEnglish (US)
Pages (from-to)735-739
Number of pages5
JournalJournal of the European Ceramic Society
Volume15
Issue number8
DOIs
StatePublished - Jan 1 1995

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

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