Glass manufacturing – Processes – With coating
Patent
1996-02-01
1998-11-03
Ahmad, Nasser
Glass manufacturing
Processes
With coating
65 601, 65 6053, 2041921, 20419212, 427108, 4271262, 4271263, C03C 1723, C03C 1434
Patent
active
058302522
ABSTRACT:
Amorphous metal oxide barrier layers of titanium oxide, zirconium oxide and zinc/tin oxide are effective as alkali metal ion barrier layers at thicknesses below 180 Angstroms. The amorphous metal oxide barrier layers are most effective when the density of the layer is equal to or greater than 90% of the crystalline density. The barrier layers prevent migration of alkali metal ions such as sodium ions from glass substrates into a medium e.g. electrolyte of a photochromic cell, liquid material of a liquid crystal display device contacting the glass surface. The properties of the medium, particularly electroconductive metal oxide coatings, are susceptible to deterioration by the presence of sodium ions migrating from the glass.
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Zelazowska, E., "Study of Metal Oxide and Titanium Oxynitride Coatings on Soda-Lime Glass", Szklo I Ceramika, vol. 43, No. 6, (1992), pp. 2-7.
Finley James J.
Gillery F. Howard
Ahmad Nasser
Lepiane Donald C.
PPG Industries Inc.
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