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Powder preparation and UV absorption properties of selected compositions in the CeO2-Y2O3 system |
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| Authors: | Franck Tessier François Cheviré Odile Merdrignac-Conanec Michel Bouchard |
| Institution: | a UMR CNRS 6226 “Sciences Chimiques de Rennes”, équipe “Verres et Céramiques”, Université de Rennes 1, 35042 Rennes cedex, France b Laboratoire d’Ingénierie des Matériaux et des Hautes Pressions, CNRS UPR 1311, Université Paris 13, 99 Avenue J.B. Clément, 93430 Villetaneuse, France |
| Abstract: | Several approaches have been investigated to prepare fluorite-type compositions within the (1−x) CeO2-xYO1.5 system. The optical properties of the resulting modified-ceria materials have been characterized in order to evaluate their potential abilities as inorganic UV absorbers. Diffuse reflectance analyses reveal a strong optical absorption between 390 and 400 nm for all substituted compositions and the spectral selectivities are estimated suitable for the targeted application. Additionally, time resolved microwave conductivity (TRMC) and phenol photodegradation analyses do not indicate any photocalatytic activity for these compositions. Aqueous colloidal suspensions of the Ce0.7Y0.3O1.85 UV absorber have been carried out. |
| Keywords: | Modified ceria Solid solution Optical properties UV absorbers |
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