Patra, Amitava and Ganguli, Dibyendu (1999) Study of rehydration process of alumina containing cerium doped silica gels by ultraviolet, visible and FTIR spectroscopy. Physics and Chemistry of Glasses, 40 (5). pp. 248-251. ISSN 0031-9090

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Alumina containing Ce doped silica xerogel and glasses were prepared by sol-gel processing at 500-1000 degrees C under oxygen atmosphere. The partially densified gels were kept at 80% relative humidity for ageing and spectroscopic properties of the rehydrated partially densified gels were mainly studied by absorption and FTIR spectroscopy. With ageing time the generation of absorption bands of Ce3+ ions suggested the change of local symmetry of the Ce ions. Finally, fourfold splitting was observed for Ce3+ after 60 days indicating eight co-ordinated water complexes like dodecaheral complexes having symmetry group D-2d.

Item Type: Article
Subjects: Engineering Materials
Divisions: Sol Gel
Depositing User: Bidhan Chaudhuri
Date Deposited: 18 Jun 2012 07:50
Last Modified: 06 Apr 2016 09:38

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