Enhanced densification of thin tape cast Ceria-Gadolinium Oxide (CGO) layers by rheological optimization of slurries

Debora Marani; Vincenzo Esposito; Bhaskar Reddy Sudireddy; Janet Jonna Bentzen; Peter Stanley Jørgensen; De Wei Ni; Francesca Teocoli; Wolff-Ragnar Kiebach

doi:10.1016/j.ceramint.2017.01.098

Enhanced densification of thin tape cast Ceria-Gadolinium Oxide (CGO) layers by rheological optimization of slurries

Debora Marani, Vincenzo Esposito, Bhaskar Reddy Sudireddy, Janet Jonna Bentzen, Peter Stanley Jørgensen, De Wei Ni, Francesca Teocoli, Wolff-Ragnar Kiebach

Department of Energy Conversion and Storage

Research output: Contribution to journal › Journal article › Research › peer-review

Abstract

Optimized CGO-based slurries are formulated and shaped into thin dense layers via a tape-casting process. The formulation is adjusted with respect to the rheological behaviour. The internal structure and flow properties of slurries are explored with the aim of identifying the required conditions to obtain thin dense CGO layers at reduced sintering temperatures (1200 °C). We demonstrate a correlation between the rheological properties of the slurries, the sintering behaviour and the microstructure of the resulting tapes. Remarkably, a dense CGO layer less than 20 μm thick is obtained with a non-congested slurry, having optimized ceramic loading and liquid-like behaviour.

Original language	English
Journal	Ceramics International
Volume	43
Issue number	7
Pages (from-to)	5647-5653
ISSN	0272-8842
DOIs	https://doi.org/10.1016/j.ceramint.2017.01.098
Publication status	Published - 2017

Keywords

Cerium-gadolinium oxide
Rheology
Thin dense layers
Tape casting
Sintering behaviour
Symmetric single-phase cells

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10.1016/j.ceramint.2017.01.098

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title = "Enhanced densification of thin tape cast Ceria-Gadolinium Oxide (CGO) layers by rheological optimization of slurries",

abstract = "Optimized CGO-based slurries are formulated and shaped into thin dense layers via a tape-casting process. The formulation is adjusted with respect to the rheological behaviour. The internal structure and flow properties of slurries are explored with the aim of identifying the required conditions to obtain thin dense CGO layers at reduced sintering temperatures (1200 °C). We demonstrate a correlation between the rheological properties of the slurries, the sintering behaviour and the microstructure of the resulting tapes. Remarkably, a dense CGO layer less than 20 μm thick is obtained with a non-congested slurry, having optimized ceramic loading and liquid-like behaviour.",

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author = "Debora Marani and Vincenzo Esposito and Sudireddy, {Bhaskar Reddy} and Bentzen, {Janet Jonna} and J{\o}rgensen, {Peter Stanley} and Ni, {De Wei} and Francesca Teocoli and Wolff-Ragnar Kiebach",

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AU - Marani, Debora

AU - Esposito, Vincenzo

AU - Sudireddy, Bhaskar Reddy

AU - Bentzen, Janet Jonna

AU - Jørgensen, Peter Stanley

AU - Ni, De Wei

AU - Teocoli, Francesca

AU - Kiebach, Wolff-Ragnar

PY - 2017

Y1 - 2017

N2 - Optimized CGO-based slurries are formulated and shaped into thin dense layers via a tape-casting process. The formulation is adjusted with respect to the rheological behaviour. The internal structure and flow properties of slurries are explored with the aim of identifying the required conditions to obtain thin dense CGO layers at reduced sintering temperatures (1200 °C). We demonstrate a correlation between the rheological properties of the slurries, the sintering behaviour and the microstructure of the resulting tapes. Remarkably, a dense CGO layer less than 20 μm thick is obtained with a non-congested slurry, having optimized ceramic loading and liquid-like behaviour.

AB - Optimized CGO-based slurries are formulated and shaped into thin dense layers via a tape-casting process. The formulation is adjusted with respect to the rheological behaviour. The internal structure and flow properties of slurries are explored with the aim of identifying the required conditions to obtain thin dense CGO layers at reduced sintering temperatures (1200 °C). We demonstrate a correlation between the rheological properties of the slurries, the sintering behaviour and the microstructure of the resulting tapes. Remarkably, a dense CGO layer less than 20 μm thick is obtained with a non-congested slurry, having optimized ceramic loading and liquid-like behaviour.

KW - Cerium-gadolinium oxide

KW - Rheology

KW - Thin dense layers

KW - Tape casting

KW - Sintering behaviour

KW - Symmetric single-phase cells

U2 - 10.1016/j.ceramint.2017.01.098

DO - 10.1016/j.ceramint.2017.01.098

M3 - Journal article

SN - 0272-8842

VL - 43

SP - 5647

EP - 5653

JO - Ceramics International

JF - Ceramics International

IS - 7

ER -

Enhanced densification of thin tape cast Ceria-Gadolinium Oxide (CGO) layers by rheological optimization of slurries

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Keywords

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