Optical characterization of 316L stainless steel coated with sol-gel titania

Vasconcelos, D. C. L., Nunes, E. H. M., Sabioni, A. C. S., Vasconcelos, P. M. P. and Vasconcelos, W. L. (2012) Optical characterization of 316L stainless steel coated with sol-gel titania. Journal of Non-Crystalline Solids, 358 22: 3042-3047. doi:10.1016/j.jnoncrysol.2012.07.035

Author Vasconcelos, D. C. L.
Nunes, E. H. M.
Sabioni, A. C. S.
Vasconcelos, P. M. P.
Vasconcelos, W. L.
Title Optical characterization of 316L stainless steel coated with sol-gel titania
Journal name Journal of Non-Crystalline Solids   Check publisher's open access policy
ISSN 0022-3093
Publication date 2012-11
Sub-type Article (original research)
DOI 10.1016/j.jnoncrysol.2012.07.035
Volume 358
Issue 22
Start page 3042
End page 3047
Total pages 6
Place of publication Amsterdam, Netherlands
Publisher Elsevier
Collection year 2013
Language eng
Abstract In this work 316L stainless steel substrates were coated with sol-gel derived films by means of the dip-coating technique. Titanium isopropoxide and ethanol were used as chemical precursor and solvent, respectively. The dip-coating step was performed using withdrawal speeds of 6 mm/min, 30 mm/min, and 60 mm/min. Next, the samples were heat treated in air for 30 min at 100 °C, 300 °C, and 400 °C. The processed composites were examined by FTIR and UV-vis spectroscopies. We observed that the materials prepared in this work can exhibit a variety of colors depending on the heat treatment temperature, withdrawal speed, and precursor:solvent molar ratio used in their processing. It is an important finding since this behavior could lead to architectural application of these materials. We believe that the changes observed in the UV-vis spectra and the colors of these samples could be related to the variation of the coating thickness as the processing conditions were modified. FTIR tests revealed that the ratio between the intensities of features ascribed to hydroxyl groups and TiO bonds decreased as the heat treatment temperature was increased. On the other hand, the ratio between bands related to TiOTi and TiO bonds decreased when the heating temperature was raised from 100 °C to 300 °C.
Keyword Sol-gel
Titanium dioxide
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Available online: 21 August 2012.

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Earth Sciences Publications
Official 2013 Collection
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