Reactive sintering and retrograde densification of bulk bismuth-based superconductors

Ryan L. Thayer, Sarah R. Schmidt, Stephen E. Dorris, Jeffrey W. Bullard, Michael T. Lanagan

Research output: Contribution to journalArticle

6 Scopus citations

Abstract

Densification was observed when bulk ceramic superconductors with a composition of Bi1.8Pb0.4Sr2Ca2Cu3O10+δ were sintered for short times (<4 h) near the incongruent melting temperature. The initial shrinkage of the powder compacts was correlated with the existence of a transient liquid phase. Retrograde densification, which is a decrease in density, occurred for longer sintering times and was attributed to changes in pore structure. The results provide direction for future processing of bulk bismuth-based superconductors and powder-in-tube tapes for the fabrication of long-length wire.

Original languageEnglish (US)
Pages (from-to)2365-2368
Number of pages4
JournalJournal of the American Ceramic Society
Volume83
Issue number10
StatePublished - Oct 1 2000

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Materials Chemistry

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