Effects of co-sintering in self-standing CGO/YSZ and CGO/ ScYSZ dense bi-layers

Francesca Teocoli, De Wei Ni, Karen Brodersen, Søren Preben Vagn Foghmoes, Severine Ramousse, Vincenzo Esposito

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Viscoelastic properties and sintering mechanisms of tape-casted gadolinium-doped ceria (CGO), yttrium-stabilized zirconia (YSZ), and scandium–yttriumstabilized zirconia (ScYSZ) are characterized in order to investigate the reciprocal thermo-mechanical compatibility when arranged as a self-standing bi-layered electrolyte system. The combined use of thermo-mechanical analysis, optical dilatometry, and scanning electron microscopy ensures a systematic characterization of both the individual layers and CGO/YSZ and CGO/ScYSZ bi-layered laminates. The results of the co-firing process of the bi-layers are critical due to the mismatch of thermo-mechanical and sintering properties among the materials. Despite the better sinteractivity of ScYSZ, the self-standing CGO/ScYSZ bilayer presents more challenges in terms of densification compared with the CGO/YSZ bi-layer. In particular, above 1200 C, ScYSZ and CGO show residual porosity, and at higher sintering temperatures, above 1300 C, full densification is completely inhibited by constrained sintering phenomena.
Original languageEnglish
JournalJournal of Materials Science
Volume49
Pages (from-to)5324–5333
ISSN0022-2461
DOIs
Publication statusPublished - 2014

Cite this

@article{cfdeb9d2c0b3454db05d2ab73c353345,
title = "Effects of co-sintering in self-standing CGO/YSZ and CGO/ ScYSZ dense bi-layers",
abstract = "Viscoelastic properties and sintering mechanisms of tape-casted gadolinium-doped ceria (CGO), yttrium-stabilized zirconia (YSZ), and scandium–yttriumstabilized zirconia (ScYSZ) are characterized in order to investigate the reciprocal thermo-mechanical compatibility when arranged as a self-standing bi-layered electrolyte system. The combined use of thermo-mechanical analysis, optical dilatometry, and scanning electron microscopy ensures a systematic characterization of both the individual layers and CGO/YSZ and CGO/ScYSZ bi-layered laminates. The results of the co-firing process of the bi-layers are critical due to the mismatch of thermo-mechanical and sintering properties among the materials. Despite the better sinteractivity of ScYSZ, the self-standing CGO/ScYSZ bilayer presents more challenges in terms of densification compared with the CGO/YSZ bi-layer. In particular, above 1200 C, ScYSZ and CGO show residual porosity, and at higher sintering temperatures, above 1300 C, full densification is completely inhibited by constrained sintering phenomena.",
author = "Francesca Teocoli and Ni, {De Wei} and Karen Brodersen and Foghmoes, {S{\o}ren Preben Vagn} and Severine Ramousse and Vincenzo Esposito",
year = "2014",
doi = "10.1007/s10853-014-8235-y",
language = "English",
volume = "49",
pages = "5324–5333",
journal = "Journal of Materials Science",
issn = "0022-2461",
publisher = "Springer New York",

}

Effects of co-sintering in self-standing CGO/YSZ and CGO/ ScYSZ dense bi-layers. / Teocoli, Francesca; Ni, De Wei; Brodersen, Karen; Foghmoes, Søren Preben Vagn; Ramousse, Severine; Esposito, Vincenzo.

In: Journal of Materials Science, Vol. 49, 2014, p. 5324–5333.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Effects of co-sintering in self-standing CGO/YSZ and CGO/ ScYSZ dense bi-layers

AU - Teocoli, Francesca

AU - Ni, De Wei

AU - Brodersen, Karen

AU - Foghmoes, Søren Preben Vagn

AU - Ramousse, Severine

AU - Esposito, Vincenzo

PY - 2014

Y1 - 2014

N2 - Viscoelastic properties and sintering mechanisms of tape-casted gadolinium-doped ceria (CGO), yttrium-stabilized zirconia (YSZ), and scandium–yttriumstabilized zirconia (ScYSZ) are characterized in order to investigate the reciprocal thermo-mechanical compatibility when arranged as a self-standing bi-layered electrolyte system. The combined use of thermo-mechanical analysis, optical dilatometry, and scanning electron microscopy ensures a systematic characterization of both the individual layers and CGO/YSZ and CGO/ScYSZ bi-layered laminates. The results of the co-firing process of the bi-layers are critical due to the mismatch of thermo-mechanical and sintering properties among the materials. Despite the better sinteractivity of ScYSZ, the self-standing CGO/ScYSZ bilayer presents more challenges in terms of densification compared with the CGO/YSZ bi-layer. In particular, above 1200 C, ScYSZ and CGO show residual porosity, and at higher sintering temperatures, above 1300 C, full densification is completely inhibited by constrained sintering phenomena.

AB - Viscoelastic properties and sintering mechanisms of tape-casted gadolinium-doped ceria (CGO), yttrium-stabilized zirconia (YSZ), and scandium–yttriumstabilized zirconia (ScYSZ) are characterized in order to investigate the reciprocal thermo-mechanical compatibility when arranged as a self-standing bi-layered electrolyte system. The combined use of thermo-mechanical analysis, optical dilatometry, and scanning electron microscopy ensures a systematic characterization of both the individual layers and CGO/YSZ and CGO/ScYSZ bi-layered laminates. The results of the co-firing process of the bi-layers are critical due to the mismatch of thermo-mechanical and sintering properties among the materials. Despite the better sinteractivity of ScYSZ, the self-standing CGO/ScYSZ bilayer presents more challenges in terms of densification compared with the CGO/YSZ bi-layer. In particular, above 1200 C, ScYSZ and CGO show residual porosity, and at higher sintering temperatures, above 1300 C, full densification is completely inhibited by constrained sintering phenomena.

U2 - 10.1007/s10853-014-8235-y

DO - 10.1007/s10853-014-8235-y

M3 - Journal article

VL - 49

SP - 5324

EP - 5333

JO - Journal of Materials Science

JF - Journal of Materials Science

SN - 0022-2461

ER -