Nanoscale yttrium distribution in yttrium-doped ceria powder

Shao Ju Shih, Lan-Yun Chang, Chin Yi Chen, Konstantin B. Borisenko, David J H Cockayne

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

The microstructure and geometry of yttrium-doped ceria particles, synthesized by spray pyrolysis (SP), were characterized by transmission electron microscopy, and the distribution of yttrium was investigated by energy-dispersive X-ray spectroscopy (EDX). The yttrium distribution was investigated by considering an electron interaction volume and geometry of the particle in an EDX profile analysis. Two models, linear and non-linear, for the yttrium concentration gradient were tested against the experimental EDX data for hollow particles. The results showed that the linear concentration distribution of yttrium fits the EDX profiles appreciably better than the non-linear concentration gradient model. This suggests that yttrium distribution is mainly controlled by the different diffusion rates of the precursors from the centre to the surface of the particle, which could be related to their different solubilities, during the heating process in SP.

Original languageEnglish (US)
Pages (from-to)2145-2152
Number of pages8
JournalJournal of Nanoparticle Research
Volume11
Issue number8
DOIs
StatePublished - Nov 1 2009
Externally publishedYes

Fingerprint

Yttrium
X-ray Spectroscopy
Cerium compounds
yttrium
Powder
Powders
Pyrolysis
Spray
Energy
Spray pyrolysis
Gradient
spectroscopy
pyrolysis
sprayers
Solubility
x rays
Transmission Electron Microscopy
Precursor
Heating
Microstructure

Keywords

  • EDX
  • Nanopowder
  • Solid oxide fuel cells
  • Spray pyrolysis
  • Synthesis
  • TEM
  • Yttrium-doped ceria

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Modeling and Simulation
  • Chemistry(all)
  • Materials Science(all)
  • Bioengineering

Cite this

Nanoscale yttrium distribution in yttrium-doped ceria powder. / Shih, Shao Ju; Chang, Lan-Yun; Chen, Chin Yi; Borisenko, Konstantin B.; Cockayne, David J H.

In: Journal of Nanoparticle Research, Vol. 11, No. 8, 01.11.2009, p. 2145-2152.

Research output: Contribution to journalArticle

Shih, Shao Ju ; Chang, Lan-Yun ; Chen, Chin Yi ; Borisenko, Konstantin B. ; Cockayne, David J H. / Nanoscale yttrium distribution in yttrium-doped ceria powder. In: Journal of Nanoparticle Research. 2009 ; Vol. 11, No. 8. pp. 2145-2152.
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