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

  • Journal of the Korean Crystal Growth and Crystal Technology
  • Abbr : J. Korean Cryst. Growth Cryst. Technol.
  • 2022, 32(1), pp.12-15
  • DOI : 10.6111/JKCGCT.2022.32.1.012
  • Publisher : The Korea Association Of Crystal Growth, Inc.
  • Research Area : Engineering > Materials Science and Engineering
  • Received : February 7, 2022
  • Accepted : February 16, 2022
  • Published : February 28, 2022

Kang, Seung-Min 1 Chang-Sam Kim 1

1한서대학교

Accredited

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°C, 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°C at the viscosity of logη=12.3 and 10 (Pa·s), respectively, but lowers the temperatures by 1 and 21°C at the viscosity of log η= 6.6 and 1 (Pa·s), respectively.

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