Cold sintering of yttria-stabilized cubic bismuth oxide: Conductivity and microstructural evolution of metastable grain boundaries with annealing

Kosuke Tsuji, Thomas Herisson De Beauvoir, Arnaud Ndayishimiye, Ke Wang, Clive A. Randall

Research output: Contribution to journalArticlepeer-review

Abstract

Yttrium-doped bismuth oxide (BYO) is densified by the cold sintering process (CSP) at 300 °C. The relative density reached is ∼90% of the theoretical density. The as-sintered BYO ceramic shows a total conductivity of >1 mS/cm at 500 °C. The conductivity slightly increased after the annealing process. The scanning and transmission electron microscopy analysis revealed that a metastable secondary phase formed adjacent to BYO grains in the as-CSP specimens. Once annealed, the secondary phase recrystallized and there is an associated total conductivity improvement.

Original languageEnglish (US)
Article number215104
JournalJournal of Applied Physics
Volume128
Issue number21
DOIs
StatePublished - Dec 7 2020

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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