Single-step densification of nanocrystalline CeO2 by the cold sintering process

Thomasina H. Zaengle, Arnaud Ndayishimiye, Kosuke Tsuji, Zhongming Fan, Sun Hwi Bang, Jonathan Perini, Scott T. Misture, Clive A. Randall

Research output: Contribution to journalArticle

Abstract

This study reports the successful single-step cold sintering of nanocrystalline cerium dioxide (CeO2) at temperatures ranging from 250°C to 400°C under 500 MPa, using molten hydroxides flux solvents. CeO2 ceramics obtained were 82 to 91% of the theoretical density. Structural and microstructural investigations of the as-cold sintered CeO2 ceramics were conducted to further understand this new approach to cold sinter ceramics. Electrical conductivity measured by two-point AC impedance demonstrated an activation energy for grain conductivity of 0.49 eV, with impedance spectra characteristic of nanoscale CeO2.

Original languageEnglish (US)
Pages (from-to)2979-2985
Number of pages7
JournalJournal of the American Ceramic Society
Volume103
Issue number5
DOIs
StatePublished - May 1 2020

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Materials Chemistry

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    Zaengle, T. H., Ndayishimiye, A., Tsuji, K., Fan, Z., Bang, S. H., Perini, J., Misture, S. T., & Randall, C. A. (2020). Single-step densification of nanocrystalline CeO2 by the cold sintering process. Journal of the American Ceramic Society, 103(5), 2979-2985. https://doi.org/10.1111/jace.17003