Promoting densification and grain growth of BaCe0.65Zr0.2Y0.15O3-δ

Wenyu Zhou*, Fanlin Zeng*, Jürgen Malzbender, Hartmut Schlenz, Wendelin Deibert, Dmitry Sergeev, Ivan Povstugar, Ruth Schwaiger, Arian Nijmeijer, Michael Müller, Olivier Guillon, Wilhelm Albert Meulenberg

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

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Abstract

BaCe0.65Zr0.2Y0.15O3-δ (BCZ20Y15) has raised great interest due to its good protonic conductivity and chemical stability. However, the sintering of the material is considerably challenged by its refractory nature. In the current work, almost fully densified single-phase BCZ20Y15 with grain sizes exceeding 10 μm was successfully fabricated by sintering at 1500 °C by using calcined powders consisting of naturally separated perovskite phases and 0.5 wt% NiO. The role of NiO as sintering aid was elucidated by Inductively Coupled Plasma Optical Emission Spectroscopy (ICP-OES) and Atom Probe Tomography (APT) methods, concerning global and local material composition. Furthermore, the mechanism leading to the promoted densification and grain growth is elucidated based on current experimental results and a comprehensive review of the literature.

Original languageEnglish
Pages (from-to)3531-3538
Number of pages8
JournalJournal of Materials Research and Technology
Volume27
Early online date20 Oct 2023
DOIs
Publication statusPublished - 1 Nov 2023

Keywords

  • UT-Gold-D
  • Grain growth
  • NiO additive
  • Perovskite
  • Proton conductor
  • Sintering
  • Densification

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