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Article Dans Une Revue Silicates Industriels Année : 2004

Optical properties of rare-earth oxides and oxynitrides, .... towards "second generation" UV absorbers

Résumé

"Second-generation" UV-blocking materials are needed. Using the fluorite-type rare-earth tungstates R6WO12 as starting reference compounds, anionic or cationic substitutions were achieved in (R,R’)-(W,Mo)-(O,N) systems, thus delimiting large solid solution domains. The continuous shift of the absorption edge in diffuse reflectance spectra towards lower energy values makes it possible to tune it at the required value of 3.1 eV (400 nm), with in several cases a steep enough slope. Attempts were also carried out in perovskite (A,R)-Ti-(O,N) systems (A = alkaline-earth, R = rare-earth) to isolate suitable oxynitride compositions.
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Dates et versions

hal-01201803 , version 1 (22-09-2015)

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  • HAL Id : hal-01201803 , version 1

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François Cheviré, Franck Tessier, Roger Marchand. Optical properties of rare-earth oxides and oxynitrides, .... towards "second generation" UV absorbers. Silicates Industriels, 2004, 69 (5-6), pp.159-163. ⟨hal-01201803⟩
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