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1 ISCR - Institut des Sciences Chimiques de Rennes 2 LIMC, Departamento de Química Fundamental 3 Centro Acadêmico do Agreste 4 LACOM-INCTMN 5 Instituto de Química

Abstract : Zinc-gallium oxynitride powders ZnGaON were synthesized by nitridation of ZnGa2O4 oxide precursor obtained by polymeric precursors PP and solid state reaction SSR methods and the influence of the synthesis route of ZnGa2O4 on the final compound ZnGaON was investigated. Crystalline single phase ZnGa2O4 was obtained at 1100 oC - 12 h by SSR and at 600 oC - 2 h by PP with different grain sizes and specific surface areas according to the synthesis route. After nitridation, ZnGaON oxynitrides with a GaN würtzite-type structure were obtained in both cases, however at lower temperatures for PP samples. The microstructure and the specific surface area were strongly dependent on the oxide synthesis method and on the nitridation temperature 42 m2g-1 and 5 m2g-1 for PP and SSR oxides treated at 700 °C, respectively. The composition analyses showed a strong loss of Zn for the PP samples, favored by the increase of ammonolysis temperature and by the higher specific surface area.

Keywords : surface properties nitride oxide chemical synthesis





Autor: J. F. D. Figueiredo - Valérie Bouquet - Stéphanie Députier - Odile Merdrignac-Conanec - Isabelle Péron - E. P. Marinho - A. G

Fuente: https://hal.archives-ouvertes.fr/



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