Interrelation of technology parameters and the quality of thin-layer coatings

• Published in: Glass and ceramics 1992-06, Vol.49 (6), p.273-274
• Main Authors: Atkarskaya, A. B., Borul'ko, V. I., Goikhman, V. Yu, Dudnik, T. A., Maricheva, L. I., Popovich, S. A.
• Format: Article
• Language: English
• ISSN: 0361-7610; 1573-8515
• DOI: 10.1007/BF00677153

Thin layer coatings deposited on a glass surface by the sol-gel method can substantially alter the physical properties of the glass. The composition, properties of the film forming solution (FFS), and the quality of the films obtained from them were studied at various deposition rates. An FFS forming a high-reflection thin layer coating of the Bi2O3-TiO2-Fe2O3 system was prepared by mixing titanium alkoxide with Bi and Fe chlorides. HCl was used as the catalyst for hydrolysis. It was found that the viscosity of the FFS is independent of the form of the titanium alkoxide and increases with increase in HCl content more than with an increase in water content. The viscosity of the solution increases with the content of oxides. An inhomogeneous strip formed on the lower edge of the glass upon dipping became wider with a higher content of water, HCl and oxides, as well as with a higher viscosity of the solution and a faster withdrawal of the sample from the FFS. 1 ref.