Grain-boundary conduction in gadolinia-doped ceria

The effect of SrO addition

Pyeong Seok Cho, Yoon Ho Cho, Seung Young Park, Sung Bo Lee, Doh Yeon Kim, Hyun Min Park, Graeme Auchterlonie, John Drennan, Jong Heun Lee

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

This study examined the effect of adding SrO on the grain-boundary conduction of Ce0.9 Gd0.1 O1.95 (gadolinia-doped ceria) containing 500 ppm Si O2. The apparent grain-boundary resistivity at 300°C decreased drastically from 746.7 to 0.90-1.97 k cm upon doping with 1 mol % SrO, while the grain-interior resistivity increased gradually from 3.1 to 11.6 k cm as the SrO concentration was increased up to 5 mol %. Therefore, doping with 1 mol % SrO resulted in the minimum total resistivity. The electron probe X-ray microanalysis and the analysis of the lattice parameters suggest that the 140-500-fold enhancement in the grain-boundary conduction is attributed to the scavenging of the highly resistive siliceous phase by the SrO-containing phase.

Original languageEnglish
JournalJournal of the Electrochemical Society
Volume156
Issue number3
DOIs
Publication statusPublished - 2009 Feb 9

Fingerprint

Gadolinium
Cerium compounds
gadolinium
Grain boundaries
grain boundaries
conduction
electrical resistivity
Doping (additives)
Scavenging
scavenging
Microanalysis
electron probes
microanalysis
Lattice constants
lattice parameters
X rays
Electrons
augmentation
gadolinium oxide
x rays

ASJC Scopus subject areas

  • Electrochemistry
  • Electronic, Optical and Magnetic Materials
  • Materials Chemistry
  • Surfaces, Coatings and Films
  • Renewable Energy, Sustainability and the Environment
  • Condensed Matter Physics

Cite this

Grain-boundary conduction in gadolinia-doped ceria : The effect of SrO addition. / Cho, Pyeong Seok; Cho, Yoon Ho; Park, Seung Young; Lee, Sung Bo; Kim, Doh Yeon; Park, Hyun Min; Auchterlonie, Graeme; Drennan, John; Lee, Jong Heun.

In: Journal of the Electrochemical Society, Vol. 156, No. 3, 09.02.2009.

Research output: Contribution to journalArticle

Cho, PS, Cho, YH, Park, SY, Lee, SB, Kim, DY, Park, HM, Auchterlonie, G, Drennan, J & Lee, JH 2009, 'Grain-boundary conduction in gadolinia-doped ceria: The effect of SrO addition', Journal of the Electrochemical Society, vol. 156, no. 3. https://doi.org/10.1149/1.3046153
Cho, Pyeong Seok ; Cho, Yoon Ho ; Park, Seung Young ; Lee, Sung Bo ; Kim, Doh Yeon ; Park, Hyun Min ; Auchterlonie, Graeme ; Drennan, John ; Lee, Jong Heun. / Grain-boundary conduction in gadolinia-doped ceria : The effect of SrO addition. In: Journal of the Electrochemical Society. 2009 ; Vol. 156, No. 3.
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