Atmospheric pressure synthesis of heavy rare Earth sesquioxides nanoparticles of the uncommon monoclinic phase

Bing Guo, Ashley S. Harvey, John Neil, Ian M. Kennedy, Alexandra Navrotsky, Subhash H. Risbud

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

We report, for the first time, the atmospheric pressure synthesis of nonagglomerated nanoparticles (20-60 nm in diameter) of the uncommon monoclinic phase of some heavy rare earth sesquioxides RE 2O 3 (RE=Dy, Ho, Er, Tm, and Yb). The RE 2O 3 nanoparticles, prepared by a flame synthesis process, were characterized by X-ray diffraction, transmission electron microscopy, and electron energy loss spectroscopy. Monoclinic nanoparticles were formed when the flame temperature was sufficiently high; lower temperatures led to the formation of the normal cubic (C-type) phase. We explain the formation of the uncommon monoclinic phase on the basis of pressure-temperature phase equilibria, and the extra internal pressure induced by surface curvature of the nanoparticles.

Original languageEnglish
Pages (from-to)3683-3686
Number of pages4
JournalJournal of the American Ceramic Society
Volume90
Issue number11
DOIs
Publication statusPublished - Nov 2007
Externally publishedYes

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atmospheric pressure
Rare earths
Atmospheric pressure
Nanoparticles
Flame synthesis
Electron energy loss spectroscopy
phase equilibrium
Phase equilibria
Temperature
curvature
transmission electron microscopy
temperature
spectroscopy
X-ray diffraction
Transmission electron microscopy
X ray diffraction
electron
nanoparticle
energy

ASJC Scopus subject areas

  • Ceramics and Composites

Cite this

Atmospheric pressure synthesis of heavy rare Earth sesquioxides nanoparticles of the uncommon monoclinic phase. / Guo, Bing; Harvey, Ashley S.; Neil, John; Kennedy, Ian M.; Navrotsky, Alexandra; Risbud, Subhash H.

In: Journal of the American Ceramic Society, Vol. 90, No. 11, 11.2007, p. 3683-3686.

Research output: Contribution to journalArticle

Guo, Bing ; Harvey, Ashley S. ; Neil, John ; Kennedy, Ian M. ; Navrotsky, Alexandra ; Risbud, Subhash H. / Atmospheric pressure synthesis of heavy rare Earth sesquioxides nanoparticles of the uncommon monoclinic phase. In: Journal of the American Ceramic Society. 2007 ; Vol. 90, No. 11. pp. 3683-3686.
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