Glass substrates were dip coated with Ca0-Ba0-Si02-Ti02 system sols which were stabilised by chelation with acetic acid. Infrared absorption spectra were taken to understand the processes of sol formation and gel to glass transition. The change in surface composition of coated substrates due to immersion in alkaline solution up to 144h was characterised by scanning electron microscopy (SEM) and atom absorption spectrophotometry analysis. It was found that alkali corrosion of the coated substrate results in the formation of insoluble Ti02 rich film and sodium and calcium silicate crystals.
Origin
E China Univ Sci & Technol, Shanghai
Journal Title
Glass Tech 41 2 2000 65-70
Sector
Special Glass
Class
S 1989