Bi(Pb)-Sr-Ca-Cu-O (2223) superconductor prepared by improved sol-gel technique

A. Tampieri, G. Celotti, S. Lesca, G. Bezzi, T. M G La Torretta, G. Magnani

Research output: Contribution to journalArticlepeer-review

30 Scopus citations

Abstract

A particular sol-gel process for preparation of BSCCO (2223) powder was devised, settled and tested. Water-in-oil type emulsion technique associated to internal gelation process was chosen, starting from cations' nitrates. Dried powders were calcined for a few minutes at 400°C and then fired at 850°C in steps of 5 h with intermediate grindings: in only 14 h 92% pure (2223) phase was obtained. Powder mean particle size resulted very low (<1 μm) and morphology is characterized by globular grains which are both promising features for subsequent pressure sintering technique. Moreover, the method appears well adaptable to large scale production.

Original languageEnglish (US)
Pages (from-to)119-126
Number of pages8
JournalJournal of the European Ceramic Society
Volume20
Issue number2
DOIs
StatePublished - Jan 1 2000

Keywords

  • Oxide superconductors
  • Powder-chemical preparation
  • Sol-gel processes

ASJC Scopus subject areas

  • Ceramics and Composites

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