Optical properties of oxynitride powders

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  • TESSIER Franck
    UMR CNRS 6226 "Sciences Chimiques de Rennes", Équipe "Verres et Céramiques", Groupe "Matériaux Nitrures", Université de Rennes 1
  • MAILLARD Pascal
    UMR CNRS 6226 "Sciences Chimiques de Rennes", Équipe "Verres et Céramiques", Groupe "Matériaux Nitrures", Université de Rennes 1
  • CHEVIRÉ François
    UMR CNRS 6226 "Sciences Chimiques de Rennes", Équipe "Verres et Céramiques", Groupe "Matériaux Nitrures", Université de Rennes 1
  • DOMEN Kazunari
    Department of Chemical System Engineering, The University of Tokyo
  • KIKKAWA Shinichi
    Graduate School of Engineering, Hokkaido University

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Abstract

(Oxy)nitride materials have attractive properties directly related to the role played by nitrogen. A commonly used synthesis method consists of the thermal nitridation of an oxide precursor in flowing ammonia. As a consequence of the anionic N3-/O2- substitution results an increase in the covalent character, illustrated by a shift of the absorption edge towards higher wavelength values. Thus, oxynitrides offer potentialities as optical materials in the domain of colored pigments, UV absorbers and visible-light photocatalysts.

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