Thin films prepared from tungstate glass matrix
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Data
2008-01-30
Autores
Montanari, B. [UNESP]
Ribeiro, S. U. [UNESP]
Messaddeq, Younes [UNESP]
Li, M. S.
Poirier, G.
Título da Revista
ISSN da Revista
Título de Volume
Editor
Elsevier B.V.
Resumo
Vitreous samples containing high concentrations of WO3 (above 40% M) have been used as a target to prepare thin films. Such films were deposited using the electron beam evaporation method onto soda-lime glass substrates. These films were characterized by X-ray diffraction (XRD), perfilometry, X-ray energy dispersion spectroscopy (EDS), M-Lines and UV-vis absorption spectroscopy. In this work, experimental parameters were established to obtain stable thin films showing a chemical composition close to the glass precursor composition and with a high concentration of WO3. These amorphous thin films of about 4 mu m in thickness exhibit a deep blue coloration but they can be bleached by thermal treatment near the glass transition temperature. Such bleached films show several guided modes in the visible region and have a high refractive index. Controlled crystallization was realized and thus it was possible to obtain WO3 microcrystals in the amorphous phase. (C) 2007 Elsevier B.V. All rights reserved.
Descrição
Palavras-chave
glass, tungsten, thin film
Como citar
Applied Surface Science. Amsterdam: Elsevier B.V., v. 254, n. 7, p. 2085-2089, 2008.