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

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19 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.}",

note = "Funding Information: This work was supported by AFOSR grant (grant no. FA9550‐16‐1‐0429, CAR). STM and THZ were supported by STM's Inamori Professorship and the US DOE under grant DE‐FE0031647. We gratefully acknowledge Dr Seth Berbano for fruitful discussions. Publisher Copyright: {\textcopyright} 2020 The American Ceramic Society",

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month = may,

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doi = "10.1111/jace.17003",

language = "English (US)",

volume = "103",

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T1 - Single-step densification of nanocrystalline CeO2 by the cold sintering process

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.

N1 - Funding Information: This work was supported by AFOSR grant (grant no. FA9550‐16‐1‐0429, CAR). STM and THZ were supported by STM's Inamori Professorship and the US DOE under grant DE‐FE0031647. We gratefully acknowledge Dr Seth Berbano for fruitful discussions. Publisher Copyright: © 2020 The American Ceramic Society

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

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