Structural Changes of Sol–Gel‐Derived TiO2–SiO2Coatings in an Environment of High Temperature and High Humidity
- 1 November 1993
- journal article
- Published by Wiley in Journal of the American Ceramic Society
- Vol. 76 (11) , 2899-2903
- https://doi.org/10.1111/j.1151-2916.1993.tb04034.x
Abstract
Structural changes in sol–gel‐derived TiO2–SiO2coatings were found to proceed in an environment of high temperature and high humidity as follows: (1) dissociation of Si–O–Ti bonds in the coating by the attack of water vapor, (2) formation of Ti–O–Ti bonds, and (3) nucleation and growth of anatase TiO2. The coating obtained with the addition of poly(ethylene glycol), PEG, reacts with water vapor more easily than the coating obtained without PEG, since the former is more porous than the latter due to the decomposition of PEG during heat treatment.Keywords
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