Vidros recobertos com camadas delgadas transparentes de SnO2
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Date
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Coadvisor
Graduate program
Undergraduate course
Journal Title
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Volume Title
Publisher
Sociedade Brasileira de Química
Type
Article
Access right
Acesso aberto
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Abstract
SnO2 thin layers, prepared from aqueous colloidal suspensions by the sol-gel process, have been dip-coated on commercial borosilicate glasses. The effect of the conditions of deposition on the optical and structural characteristics of the thin layers was analysed by UV-Vis spectroscopy, x-ray reflectometry and electron scanning microscopy. Layers prepared with withdrawal speed in between 0.1 and 10cm/min show thickness smaller than 90nm, roughness of the order of 2nm and transmittance higher than 80%, resulting in good optical quality samples. The roughness increases from 2 to 11nm as the withdrawal speed increases from 10 to 80cm/min, what seems to be associated to the enlargement of the layers thickness (> 90nm). The measurements of mass loss, done after etching with fluoridric acid show that the coated samples are more corrosion resistant than the uncoated borosilicate glass.
Description
Keywords
SnO2 thin layers, corrosion resistant, coated borosilicate glass
Language
Portuguese
Citation
Química Nova. Sociedade Brasileira de Química, v. 21, n. 4, p. 510-513, 1998.
