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Title: Trivalent ce2o3 and ceo2-x intermediate oxides induced by laser irradiation of ceo2 powders
Authors: Vasiliu, Florin ×
Parvulescu, V
Sarbu, Corneliu #
Issue Date: Apr-1994
Publisher: Chapman hall ltd
Series Title: Journal of materials science vol:29 issue:8 pages:2095-2101
Abstract: A strong non-stoichiometry of pure f c c CeO2 was induced by laser irradiation. The increase of laser power and/or energy density had a saturable effect on particle size growth. The possibility of CeO2 reduction to A-Ce2O3 by laser irradiation was demonstrated. Particles of stable Ce7O12 phase were observed in all specimens irradiated at low laser-power densities. An epitaxial relationship between triclinic Ce11O20 and cubic Ce12O22 phases was found. The controversial C-Ce2O3 Phase was detected at the limits of a b c c particle. An unknown b c c phase of acicular morphology, strongly related to C-Ce2O3, was also registered. The dose dependence of CeO2 structural modifications obtained by laser irradiation as a function of laser energy density variation could be explained by a simple defect aggregation model implying lattice defects (oxygen vacancies and Ce3+ ions).
URI: 
ISSN: 0022-2461
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Associated Section of ESAT - INSYS, Integrated Systems
Physical Metallurgy and Materials Engineering Section (-)
× corresponding author
# (joint) last author

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