Trivalent Ce2O3 and CeO2−x intermediate oxides induced by laser irradiation of CeO2 powders View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

1994-04

AUTHORS

F. Vasiliu, V. Pârvulescu, C. Sârbu

ABSTRACT

A strong non-stoichiometry of pure fcc 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 bcc particle. An unknown bcc 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). More... »

PAGES

2095-2101

References to SciGraph publications

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/bf01154685

DOI

http://dx.doi.org/10.1007/bf01154685

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1046155556


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