Effect of pH dependent gelation time and calcination temperature on silica network in SiO2–CaO and SiO2–MgO glasses
Source abstract
Abstract
Abstract In this work we report a study on structural aspects of pure SiO 2 , and 0.7SiO 2 ·0.3CaO and 0.7SiO 2 ·0.3MgO binary systems prepared by sol–gel method under different pH conditions that influence the gelation time leading at low pH to a slow gelation and at higher pH to a rapid gelation. By means of DTA/TG, XRD, BET, SEM and FTIR analyses it was evidenced that the short range order of pure silica glass is maintained to a large extent in the quickly gelled binary systems incorporating a relative high amount of alkaline earth oxides.
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Research context
OpenAlex topics: Glass properties and applications · Luminescence Properties of Advanced Materials · Layered Double Hydroxides Synthesis and Applications
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