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Thermal Annealing Effect on Optical Properties of Binary TiO₂-SiO₂ Sol-Gel Coatings.


ABSTRACT: TiO₂-SiO₂ binary coatings were deposited by a sol-gel dip-coating method using tetrabutyl titanate and tetraethyl orthosilicate as precursors. The structure and chemical composition of the coatings annealed at different temperatures were analyzed by Raman spectroscopy and Fourier Transform Infrared (FTIR) spectroscopy. The refractive indices of the coatings were calculated from the measured transmittance and reflectance spectra. An increase in refractive index with the high temperature thermal annealing process was observed. The Raman and FTIR results indicate that the refractive index variation is due to changes in the removal of the organic component, phase separation and the crystal structure of the binary coatings.

SUBMITTER: Wang X 

PROVIDER: S-EPMC5452115 | biostudies-other | 2012 Dec

REPOSITORIES: biostudies-other

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