Doped silica sols were prepared via hydrolysis and involving Si(OC2H5) and water in which 0.50-10 mol% equivalent of ZnO was added. Gelation was found to be progressively accelerated with increasing amount of Zn2. Activation enrgies showed significant drop with increasing dopant content. Optical absorption edges of the gels obtained after heating at 500 and 700 deg C showed progressive shifts towards loger wavelengths with increasing Zn2+, the optical band gap suggesting Si-O-Zn groups.
Origin
Central Glass & Ceramics Research Inst, India
Journal Title
Transactions Of The Indian Ceramic Society 51 5 1992 105-109
Sector
Special Glass
Class
S 762