Structure and phase composition of nanocrystalline Ce{sub 1-x}Lu{sub x}O{sub 2-y}

Journal Article · Mon Sep 15 04:00:00 EDT 2008 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/j.jssc.2008.05.033· OSTI ID:21128447

Malecka, Malgorzata A ^[1]; Kepinski, Leszek ^[1]; Maczka, Miroslaw ^[1]

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1. Institute of Low Temperature and Structure Research, Polish Academy of Sciences, P.O. Box 1410, 50-950 Wroclaw 2 (Poland)

The microstructure and phase stability of nanocrystalline mixed oxide Lu{sub x}Ce{sub 1-x}O{sub 2-y} (x=0-1) are described. Nano-sized (3-4 nm) oxide particles were prepared by the reverse microemulsion method. Morphological and structural changes upon heat treatment in an oxidizing atmosphere were studied by transmission electron microscopy (TEM), X-ray diffraction (XRD), Raman and Yb{sup 3+} emission spectroscopy, the latter ion being present as an impurity in the Lu{sub 2}O{sub 3} starting material. Up to 950 deg. C, the samples were single phase, with structure changing smoothly with Lu content from fluorite type (F) to bixbyite type (C). For the samples heated at 1100 deg. C phase separation into coexisting F- and C-type structures was observed for 0.35<x<0.7. It was also found that addition of Lu strongly hinders the crystallite growth of ceria during heat treatment at 800 and 950 deg. C. - Graphical abstract: Phase separation in nanocrystalline Ce{sub 1-x}Lu{sub x}O{sub 2-y} mixed oxide heated in air at 1100 deg. C.

• OSTI ID: 21128447
• Journal Information: Journal of Solid State Chemistry, Journal Name: Journal of Solid State Chemistry Journal Issue: 9 Vol. 181; ISSN 0022-4596; ISSN JSSCBI
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
CERIUM OXIDES
CRYSTALS
EMISSION SPECTROSCOPY
HEAT TREATMENTS
LUTETIUM OXIDES
MICROEMULSIONS
MICROSTRUCTURE
NANOSTRUCTURES
PHASE STABILITY
TEMPERATURE RANGE 1000-4000 K
TRANSMISSION ELECTRON MICROSCOPY
X-RAY DIFFRACTION
YTTERBIUM IONS