Investigation of the Properties of Soda-Lime Silicate Glass Doped with TiO₂

Abstract:

In this study, the properties of re-melted soda-lime silicate glass cullet doped with TiO₂ were investigated in order to study the potentials to use as parent glass for glass-ceramics. TiO₂ of 0.5, 1 and 3 mol% was doped into the 71SiO₂-10Na₂O-6K₂O-5CaO-4MgO-2SrO-TiO₂-Al₂O₃ glass cullet and melted at 1500°C for 3 hours, and then annealed at 550 °C. The optical and physical properties were examined. It was found that the refractive index and density of glasses were raised with increasing of TiO₂ concentration. The optical properties measured by UV-Vis spectrophotometer showed that the UV edge in the absorption spectra was shifted to a higher wavelength, and the transmission at 583 nm was decreased. The CIE L*a*b* color measurement showed that the glasses were slightly colorless but the appearance of yellow increased with higher TiO₂ concentration. Lower thermal expansion coefficient and higher glass transition temperature as well as the dilatometric softening point were observed as the concentration of TiO₂ was increasing. Finally, the calculated activation energy was 476, 493, 506 and 637 kJ/mol with 0, 0.5, 1 and 3 mol% doped TiO₂, respectively. At doped TiO₂ of 3 mol%, the properties of glass were changed rapidly due to the substitution of [Ti⁴⁺] in local [Si⁴⁺] resulting in increasing the bond strength in glass structure.

• Periodical: Advanced Materials Research (Volume 979)
• Pages: 128-131
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.979.128
• Online since: June 2014
• Authors: E. Meechoowas*, Usanee Pantulap, T. Jitwatcharakomal
• Keywords: Activation Energy of Viscous Flow, Cullet, Soda-Lime Glass, Titanium Oxide

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