Effect of sintering aids on the stress evolution of constrained sintered gadolinium-doped ceria films

Jason D. Nicholas, Sunil Mandowarab, Qing Yang, Brian W. Sheldon

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The in situ stress evolution of constrained Ce 0.9Gd 0.1O 1.95 (CGC porous thick films containing no sintering aids, 3 mol% lithium, of 3 mol% cobalt were measured from 25-1040°C in air. The addition of 3 mol% lithium facilitated relaxation of the 1040°C constrained sintering stress, and raised the sintered film relative density from 59 ± 5% (for pure CGO) to 85 ± 5%. In contrast, the addition of 3 mol% cobalt did not facilitate relaxation of the 1040°C constrained sintering stress, and only raised the sintered film relative density to 64 ± 5%. This is surprising because both lithium and cobalt at the 3 mol% doping level are effective unconstrained CGO sintering aids (reducing the sintering temperature from ∼1400°C to ∼800°C and ∼1000°C, respectively). These results are consistent with cobalt enhancing solid-state diffusion and lithium inducing liquid phase sintering. Anomalous, low-temperature tensile stresses were also observed for films of all three compositions.

LanguageEnglish (US)
Title of host publicationECS Transactions
Pages481-490
Number of pages10
Volume45
Edition1
DOIs
StatePublished - 2012
EventIonic and Mixed Conducting Ceramics 8 - 221st ECS Meeting - Seattle, WA, United States
Duration: May 6 2012May 10 2012

Other

OtherIonic and Mixed Conducting Ceramics 8 - 221st ECS Meeting
CountryUnited States
CitySeattle, WA
Period5/6/125/10/12

Profile

Gadolinium
Cerium compounds
Sintering
Cobalt
Lithium
Liquid phase sintering
Thick films
Tensile stress
Doping (additives)
Temperature
Air
Chemical analysis

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Nicholas, J. D., Mandowarab, S., Yang, Q., & Sheldon, B. W. (2012). Effect of sintering aids on the stress evolution of constrained sintered gadolinium-doped ceria films. In ECS Transactions (1 ed., Vol. 45, pp. 481-490). DOI: 10.1149/1.3701339

Effect of sintering aids on the stress evolution of constrained sintered gadolinium-doped ceria films. / Nicholas, Jason D.; Mandowarab, Sunil; Yang, Qing; Sheldon, Brian W.

ECS Transactions. Vol. 45 1. ed. 2012. p. 481-490.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Nicholas, JD, Mandowarab, S, Yang, Q & Sheldon, BW 2012, Effect of sintering aids on the stress evolution of constrained sintered gadolinium-doped ceria films. in ECS Transactions. 1 edn, vol. 45, pp. 481-490, Ionic and Mixed Conducting Ceramics 8 - 221st ECS Meeting, Seattle, WA, United States, 5/6/12. DOI: 10.1149/1.3701339
Nicholas JD, Mandowarab S, Yang Q, Sheldon BW. Effect of sintering aids on the stress evolution of constrained sintered gadolinium-doped ceria films. In ECS Transactions. 1 ed. Vol. 45. 2012. p. 481-490. Available from, DOI: 10.1149/1.3701339
Nicholas, Jason D. ; Mandowarab, Sunil ; Yang, Qing ; Sheldon, Brian W./ Effect of sintering aids on the stress evolution of constrained sintered gadolinium-doped ceria films. ECS Transactions. Vol. 45 1. ed. 2012. pp. 481-490
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