Sintering and grain growth kinetics in La0.85Sr0.15MnO3–Ce0.9Gd0.1O1.95 (LSM–CGO) porous composite

De Wei Ni, Kjeld Bøhm Andersen, Vincenzo Esposito

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

The sintering kinetics in La0.85Sr0.15MnO3–Ce0.9Gd0.1O1.95 (LSM–CGO) porous composite was studied by applying a two-stage master sintering curve (MSC) approach and comparing with LSM and CGO single-phase materials. In the two-stage MSC, sintering mechanisms occurring at different stages were separated with respect of density, giving a typical apparent activation energy values for each sintering stage of the LSM–CGO system. Compared with the single-phase materials, retardant effect of the different phases on mass diffusion leads to much higher apparent activation energy for densification of the composite. Similarly, constrain effect was also observed in grain growth in the composite. Particularly, in the investigated temperature range (1100–1250°C), the determined grain boundary mobility of CGO in the LSM–CGO composite (10−18–10−16m3N−1s−1) is comparable with the single-phase CGO, while the grain boundary mobility of LSM in the composite (10−17–10−16m3N−1s−1) is around 1 order of magnitude smaller than the single-phase LSM.
Original languageEnglish
JournalJournal of the European Ceramic Society
Volume34
Issue number15
Pages (from-to)3769-3778
Number of pages10
ISSN0955-2219
DOIs
Publication statusPublished - 2014

Keywords

  • Sintering
  • Densification
  • Grain growth
  • Ce0.9Gd0.1O1.95
  • La0.85Sr0.15MnO3

Cite this

@article{5c8909b7a8a94c2a8309dad834846aeb,
title = "Sintering and grain growth kinetics in La0.85Sr0.15MnO3–Ce0.9Gd0.1O1.95 (LSM–CGO) porous composite",
abstract = "The sintering kinetics in La0.85Sr0.15MnO3–Ce0.9Gd0.1O1.95 (LSM–CGO) porous composite was studied by applying a two-stage master sintering curve (MSC) approach and comparing with LSM and CGO single-phase materials. In the two-stage MSC, sintering mechanisms occurring at different stages were separated with respect of density, giving a typical apparent activation energy values for each sintering stage of the LSM–CGO system. Compared with the single-phase materials, retardant effect of the different phases on mass diffusion leads to much higher apparent activation energy for densification of the composite. Similarly, constrain effect was also observed in grain growth in the composite. Particularly, in the investigated temperature range (1100–1250°C), the determined grain boundary mobility of CGO in the LSM–CGO composite (10−18–10−16m3N−1s−1) is comparable with the single-phase CGO, while the grain boundary mobility of LSM in the composite (10−17–10−16m3N−1s−1) is around 1 order of magnitude smaller than the single-phase LSM.",
keywords = "Sintering, Densification, Grain growth, Ce0.9Gd0.1O1.95, La0.85Sr0.15MnO3",
author = "Ni, {De Wei} and Andersen, {Kjeld B{\o}hm} and Vincenzo Esposito",
year = "2014",
doi = "10.1016/j.jeurceramsoc.2014.04.044",
language = "English",
volume = "34",
pages = "3769--3778",
journal = "Journal of the European Ceramic Society",
issn = "0955-2219",
publisher = "Elsevier",
number = "15",

}

Sintering and grain growth kinetics in La0.85Sr0.15MnO3–Ce0.9Gd0.1O1.95 (LSM–CGO) porous composite. / Ni, De Wei; Andersen, Kjeld Bøhm; Esposito, Vincenzo.

In: Journal of the European Ceramic Society, Vol. 34, No. 15, 2014, p. 3769-3778.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Sintering and grain growth kinetics in La0.85Sr0.15MnO3–Ce0.9Gd0.1O1.95 (LSM–CGO) porous composite

AU - Ni, De Wei

AU - Andersen, Kjeld Bøhm

AU - Esposito, Vincenzo

PY - 2014

Y1 - 2014

N2 - The sintering kinetics in La0.85Sr0.15MnO3–Ce0.9Gd0.1O1.95 (LSM–CGO) porous composite was studied by applying a two-stage master sintering curve (MSC) approach and comparing with LSM and CGO single-phase materials. In the two-stage MSC, sintering mechanisms occurring at different stages were separated with respect of density, giving a typical apparent activation energy values for each sintering stage of the LSM–CGO system. Compared with the single-phase materials, retardant effect of the different phases on mass diffusion leads to much higher apparent activation energy for densification of the composite. Similarly, constrain effect was also observed in grain growth in the composite. Particularly, in the investigated temperature range (1100–1250°C), the determined grain boundary mobility of CGO in the LSM–CGO composite (10−18–10−16m3N−1s−1) is comparable with the single-phase CGO, while the grain boundary mobility of LSM in the composite (10−17–10−16m3N−1s−1) is around 1 order of magnitude smaller than the single-phase LSM.

AB - The sintering kinetics in La0.85Sr0.15MnO3–Ce0.9Gd0.1O1.95 (LSM–CGO) porous composite was studied by applying a two-stage master sintering curve (MSC) approach and comparing with LSM and CGO single-phase materials. In the two-stage MSC, sintering mechanisms occurring at different stages were separated with respect of density, giving a typical apparent activation energy values for each sintering stage of the LSM–CGO system. Compared with the single-phase materials, retardant effect of the different phases on mass diffusion leads to much higher apparent activation energy for densification of the composite. Similarly, constrain effect was also observed in grain growth in the composite. Particularly, in the investigated temperature range (1100–1250°C), the determined grain boundary mobility of CGO in the LSM–CGO composite (10−18–10−16m3N−1s−1) is comparable with the single-phase CGO, while the grain boundary mobility of LSM in the composite (10−17–10−16m3N−1s−1) is around 1 order of magnitude smaller than the single-phase LSM.

KW - Sintering

KW - Densification

KW - Grain growth

KW - Ce0.9Gd0.1O1.95

KW - La0.85Sr0.15MnO3

U2 - 10.1016/j.jeurceramsoc.2014.04.044

DO - 10.1016/j.jeurceramsoc.2014.04.044

M3 - Journal article

VL - 34

SP - 3769

EP - 3778

JO - Journal of the European Ceramic Society

JF - Journal of the European Ceramic Society

SN - 0955-2219

IS - 15

ER -