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Transactions of the INDIAN CERAMIC SOCIETY   Vol. 42  1983
Preparative Aspects of Sol-derived Oxide Glass Coatings
DEBTOSH KUNDU AND DIBYENDU GANGULI
Pages : 44-47
DOI : 10.1080/0371750X.1983.10822618
Abstract
Thin, transparent coatings of amorphous Si02 and Al20 3 were deposited on soda lime glass substrates by the dip technique, using organometallic precursor sols. The water content of the sol was found to influence its wetting behaviour, low values of H20: Si(OC2H6), being preferred for Si02 and high values of H20: AI(OC,H9B)3 for Al20a coatings of sufficient uniformity and clarity. Expulsion of volatiles and polycondensation of the coated material were allowed to take place via (i) an initial baking step at 90-l00C and (ii) a final heating step at 350-500C according to the sol composition. The procedure yielded homogeneous, highly transparent coatings, showing 84-93% transmission of the visible runge of wavelengths.
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