Impedance Spectra During Solid‐State Powder Reactions of Oxide Superconductors

Elizabeth A. Cooper*, Thomas O Mason, Mark E. Biznek, Utham Balachandran

*Corresponding author for this work

Research output: Contribution to journalArticle

15 Scopus citations

Abstract

Complex impedance spectra over the frequency range of 5 Hz to 13 MHz were measured during the solid‐state reaction of La2CuO4 (with and without Sr doping) from the constituent oxides or carbonate (Sr). A single bulk arc was observed which could be modeled as a simple resistor‐capacitor network. The resistance falls continuously with time, spanning several orders of magnitude. Complex impedance measurements appear to be quite sensitive to small volume fractions of an electronically conductive product phase, especially during the early stages of solid‐state reaction. Impedance spectroscopy should therefore be a useful tool for the investigation of processing reactions in electronic ceramics.

Original languageEnglish (US)
Pages (from-to)154-157
Number of pages4
JournalJournal of the American Ceramic Society
Volume73
Issue number1
DOIs
StatePublished - Jan 1 1990

Keywords

  • electrical properties
  • powders
  • rare earths
  • reactions
  • superconductors

ASJC Scopus subject areas

  • Ceramics and Composites
  • Geology
  • Geochemistry and Petrology
  • Materials Chemistry

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