Densification and grain growth during sintering of porous Ce0.9Gd0.1O1.95tape cast layers: A comprehensive study on heuristic methods

De Wei Ni; Cristine Grings Schmidt; Francesca Teocoli; Andreas Kaiser; Kjeld Bøhm Andersen; Severine Ramousse; Vincenzo Esposito

doi:10.1016/j.jeurceramsoc.2013.03.025

Densification and grain growth during sintering of porous Ce_0.9Gd_0.1O_1.95tape cast layers: A comprehensive study on heuristic methods

De Wei Ni, Cristine Grings Schmidt, Francesca Teocoli, Andreas Kaiser, Kjeld Bøhm Andersen, Severine Ramousse, Vincenzo Esposito

Department of Energy Conversion and Storage

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

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Abstract

The sintering behavior of porous Ce_0.9Gd_0.1O_1.95(CGO10) tape cast layers was systematically investigated to establish fundamental kinetic parameters associated to densification and grain growth. Densification and grain growth were characterized by a set of different methods to determine the dominant sintering mechanisms and kinetics, both in isothermal and at constant heating rate (iso-rate) conditions. Densification of porous CGO10 tape is thermally activated with typical activation energy which was estimated around 440–470 kJ mol⁻¹. Grain growth showed similar thermal activation energy of ∼427 ± 22 kJ mol⁻¹in the temperature range of 1100–1250ºC. Grain-boundary diffusion was identified to be the dominant mechanism in porous CGO10 tapes. Grain growth and densification mechanism were found strictly related in the investigated temperature range. Porosity acts as a grain growth inhibitor and grain boundary mobility in the porous body was estimated around 10⁻¹⁸–10⁻¹⁶m³N⁻¹s⁻¹ at the investigated temperature range.© 2013 Elsevier Ltd. All rights reserved.

Original language	English
Journal	Journal of the European Ceramic Society
Volume	33
Issue number	13-14
Pages (from-to)	2529-2537
ISSN	0955-2219
DOIs	https://doi.org/10.1016/j.jeurceramsoc.2013.03.025
Publication status	Published - 2013

Keywords

Sintering
Grain growth
CeO2
Porosity
Grain boundary

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Densification and grain growth during sintering

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@article{1a825031269a4f669848305d0765a67b,

title = "Densification and grain growth during sintering of porous Ce0.9Gd0.1O1.95tape cast layers: A comprehensive study on heuristic methods",

abstract = "The sintering behavior of porous Ce0.9Gd0.1O1.95(CGO10) tape cast layers was systematically investigated to establish fundamental kinetic parameters associated to densification and grain growth. Densification and grain growth were characterized by a set of different methods to determine the dominant sintering mechanisms and kinetics, both in isothermal and at constant heating rate (iso-rate) conditions. Densification of porous CGO10 tape is thermally activated with typical activation energy which was estimated around 440–470 kJ mol−1. Grain growth showed similar thermal activation energy of ∼427 ± 22 kJ mol−1in the temperature range of 1100–1250ºC. Grain-boundary diffusion was identified to be the dominant mechanism in porous CGO10 tapes. Grain growth and densification mechanism were found strictly related in the investigated temperature range. Porosity acts as a grain growth inhibitor and grain boundary mobility in the porous body was estimated around 10−18–10−16m3N−1s−1 at the investigated temperature range.{\textcopyright} 2013 Elsevier Ltd. All rights reserved.",

keywords = "Sintering, Grain growth, CeO2, Porosity, Grain boundary",

author = "Ni, {De Wei} and Schmidt, {Cristine Grings} and Francesca Teocoli and Andreas Kaiser and Andersen, {Kjeld B{\o}hm} and Severine Ramousse and Vincenzo Esposito",

year = "2013",

doi = "10.1016/j.jeurceramsoc.2013.03.025",

language = "English",

volume = "33",

pages = "2529--2537",

journal = "Journal of the European Ceramic Society",

issn = "0955-2219",

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Densification and grain growth during sintering of porous Ce_0.9Gd_0.1O_1.95tape cast layers: A comprehensive study on heuristic methods. / Ni, De Wei; Schmidt, Cristine Grings; Teocoli, Francesca et al.
In: Journal of the European Ceramic Society, Vol. 33, No. 13-14, 2013, p. 2529-2537.

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

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T1 - Densification and grain growth during sintering of porous Ce0.9Gd0.1O1.95tape cast layers: A comprehensive study on heuristic methods

AU - Ni, De Wei

AU - Schmidt, Cristine Grings

AU - Teocoli, Francesca

AU - Kaiser, Andreas

AU - Andersen, Kjeld Bøhm

AU - Ramousse, Severine

AU - Esposito, Vincenzo

PY - 2013

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N2 - The sintering behavior of porous Ce0.9Gd0.1O1.95(CGO10) tape cast layers was systematically investigated to establish fundamental kinetic parameters associated to densification and grain growth. Densification and grain growth were characterized by a set of different methods to determine the dominant sintering mechanisms and kinetics, both in isothermal and at constant heating rate (iso-rate) conditions. Densification of porous CGO10 tape is thermally activated with typical activation energy which was estimated around 440–470 kJ mol−1. Grain growth showed similar thermal activation energy of ∼427 ± 22 kJ mol−1in the temperature range of 1100–1250ºC. Grain-boundary diffusion was identified to be the dominant mechanism in porous CGO10 tapes. Grain growth and densification mechanism were found strictly related in the investigated temperature range. Porosity acts as a grain growth inhibitor and grain boundary mobility in the porous body was estimated around 10−18–10−16m3N−1s−1 at the investigated temperature range.© 2013 Elsevier Ltd. All rights reserved.

AB - The sintering behavior of porous Ce0.9Gd0.1O1.95(CGO10) tape cast layers was systematically investigated to establish fundamental kinetic parameters associated to densification and grain growth. Densification and grain growth were characterized by a set of different methods to determine the dominant sintering mechanisms and kinetics, both in isothermal and at constant heating rate (iso-rate) conditions. Densification of porous CGO10 tape is thermally activated with typical activation energy which was estimated around 440–470 kJ mol−1. Grain growth showed similar thermal activation energy of ∼427 ± 22 kJ mol−1in the temperature range of 1100–1250ºC. Grain-boundary diffusion was identified to be the dominant mechanism in porous CGO10 tapes. Grain growth and densification mechanism were found strictly related in the investigated temperature range. Porosity acts as a grain growth inhibitor and grain boundary mobility in the porous body was estimated around 10−18–10−16m3N−1s−1 at the investigated temperature range.© 2013 Elsevier Ltd. All rights reserved.

KW - Sintering

KW - Grain growth

KW - CeO2

KW - Porosity

KW - Grain boundary

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DO - 10.1016/j.jeurceramsoc.2013.03.025

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JO - Journal of the European Ceramic Society

JF - Journal of the European Ceramic Society

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