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

doi:10.1111/jace.17003

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 journal › Article › peer-review

30 Scopus citations

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 language	English (US)
Pages (from-to)	2979-2985
Number of pages	7
Journal	Journal of the American Ceramic Society
Volume	103
Issue number	5
DOIs	https://doi.org/10.1111/jace.17003
State	Published - May 1 2020

All Science Journal Classification (ASJC) codes

Ceramics and Composites
Materials Chemistry

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10.1111/jace.17003

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title = "Single-step densification of nanocrystalline CeO2 by the cold sintering process",

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.",

author = "Zaengle, \{Thomasina H.\} and Arnaud Ndayishimiye and Kosuke Tsuji and Zhongming Fan and Bang, \{Sun Hwi\} and Jonathan Perini and Misture, \{Scott T.\} and Randall, \{Clive A.\}",

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AU - Zaengle, Thomasina H.

AU - Ndayishimiye, Arnaud

AU - Tsuji, Kosuke

AU - Fan, Zhongming

AU - Bang, Sun Hwi

AU - Perini, Jonathan

AU - Misture, Scott T.

AU - Randall, Clive A.

PY - 2020/5/1

Y1 - 2020/5/1

N2 - 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.

AB - 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.

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JO - Journal of the American Ceramic Society

JF - Journal of the American Ceramic Society

IS - 5

ER -

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

Abstract

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