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The viscosity effect of TiO2 on soda-lime-silicate bearing glass
RISE - Research Institutes of Sweden, Built Environment, Building Technology. (Glass)ORCID iD: 0000-0003-2160-6979
2019 (English)Conference paper, Poster (with or without abstract) (Other academic)
Abstract [en]

The effect of TiO2 on the high-temperature viscosity of soda-lime-silicate glass have been investigated. The silica-rich part of quaternary can be taken as a template for a wide variety of technical glasses. The measurements were performed using a rotational viscometer. The viscosities were recorded from 1550 °C downwards to 930 °C. The entire viscosity-temperature curves were fitted to the Angell-Rao viscosity equation and thermodynamic data were calculated using the method of Ojovan and the liquid fragility according to Angell. As TiO2 is replacing SiO2 it has a slight suppressing effect on the viscosity until the limit when Na2O/TiO2 ratio is less than 2, indicating a transformation of the structure of TiO2, a remarkable increase in the fragility and viscosity is observed for the calculated low temperature region. The change is not as evident for the high-temperature region. CaO replaced by TiO2 gives almost no effect on the viscosity, however, as it approaches Na2O/TiO2≈2 it tends to crystallize at temperatures of 1000-1050 °C.

Place, publisher, year, edition, pages
2019.
National Category
Materials Engineering
Identifiers
URN: urn:nbn:se:ri:diva-39908OAI: oai:DiVA.org:ri-39908DiVA, id: diva2:1351868
Conference
4th Internation Workshop on Glass and Entropy and 9th International Otto Schott Colloquium
Funder
Swedish Research Council Formas, 2018-00707Available from: 2019-09-17 Created: 2019-09-17 Last updated: 2019-09-17Bibliographically approved

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CiteExportLink to record
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  • apa
  • ieee
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