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http://dx.doi.org/10.6111/JKCGCT.2022.32.1.012

The effect of SiO2, Na2O, and CaO on the isokom temperatures in soda-lime glass  

Kang, Seung Min (International Graduate School of Design Convergence, Hanseo University)
Kim, Chang-Sam (Industry-Academic Cooperation Foundation, Hanseo University)
Publication Information
Journal of the Korean Crystal Growth and Crystal Technology / v.32, no.1, 2022 , pp. 12-15 More about this Journal
Abstract
The effect of SiO2, Na2O and CaO on isokom temperatures in soda-lime glass is estimated by comparing calculated isokom temperatures using viscosity model proposed by Lakatos. The isokom temperatures at the viscosity of log η = 12.3, 10, 6.6 and 1 (Pa·s) are lowered by 6, 7, 10 and 24℃, respectively, by the substitution of SiO2 with Na2O by 1 mol%. Meanwhile, replacing 1 mol% of SiO2 with CaO raises the isokom temperatures by 3~4 and 2℃ at the viscosity of log η = 12.3 and 10 (Pa·s), respectively, but lowers the temperatures by 1 and 21℃ at the viscosity of log η = 6.6 and 1(Pa·s), respectively.
Keywords
Soda-lime glass; Viscosity; Isokom temperature; Lakatos model; CaO;
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