Electric field-assisted pressureless sintering gadolinium-, yttrium- and samarium-doped barium cerate

R. Muccillo*, V. Esposito, D.Z. de Florio, E.N.S. Muccillo

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Gadolinium-, yttrium- and samarium-doped barium cerate compounds were sintered either conventionally at 1500 °C or applying an electric field at 1200 °C. The combined results of dilatometry and impedance spectroscopy measurements in electric field-assisted sintered specimens show substantial improvement of the electrical conductivity. Improved grain-to-grain contact and the thermal removal of depleted chemical species due to Joule heating at the space charge region are proposed as the main mechanisms for the increase of both the grain boundary and the bulk electrical conductivities, respectively.

Original languageEnglish
JournalScripta Materialia
Volume156
Pages (from-to)6-9
ISSN1359-6462
DOIs
Publication statusPublished - 2018

Keywords

  • Flash sintering
  • Impedance spectroscopy
  • Electroceramics
  • Proton conductors

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