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

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.

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Work Title Cold sintering of yttria-stabilized cubic bismuth oxide: Conductivity and microstructural evolution of metastable grain boundaries with annealing
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Open Access
Creators
  1. Kosuke Tsuji
  2. Thomas Herisson De Beauvoir
  3. Arnaud Ndayishimiye
  4. Ke Wang
  5. Clive A. Randall
License In Copyright (Rights Reserved)
Work Type Article
Publisher
  1. Journal of Applied Physics
Publication Date December 7, 2020
Publisher Identifier (DOI)
  1. https://doi.org/10.1063/5.0014287
Deposited August 02, 2022

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Version 1
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  • Created
  • Added Tsuji-JAppPhys-Dec2020.pdf
  • Added Creator Kosuke Tsuji
  • Added Creator Thomas Herisson De Beauvoir
  • Added Creator Arnaud Ndayishimiye
  • Added Creator Ke Wang
  • Added Creator Clive A. Randall
  • Published
  • Updated Work Title, Subtitle Show Changes
    Work Title
    • Cold sintering of yttria-stabilized cubic bismuth oxide
    • Cold sintering of yttria-stabilized cubic bismuth oxide: Conductivity and microstructural evolution of metastable grain boundaries with annealing
    Subtitle
    • Conductivity and microstructural evolution of metastable grain boundaries with annealing
  • Updated