Glass Reflections
Cambridge 7th to 9th September

Presenting Author:
Ulrike Veit

article posted 6 May 2015

Ulrike Veit

Ulrike Veit studied Materials Science at the University Jena, graduating in 2010 with Diploma (equivalent. to MSc, overall grade "very good") . Since then she has been a PhD student at the Otto-Schott-Institut für Materialforschung in the work group of Prof. Rüssel. The title of her Thesis is: "Development and investigation of properties of high-strength Calcium Oxide-Magnesium Oxide- Aluminum Oxide-Siliciumdioxide glasses".

Density, Young's Modulus and Viscosity of Glasses Close to the
Eutectic Composition in the CaO-Al2O3-SiO2-System

Ulrike Veit* & Christian Rüssel
Otto-Schott-Institut für Materialforschung, Jena University,
Fraunhoferstr. 6, 07743 Jena

The properties of good glass forming systems within the CaO-Al2O3-SiO2-system (CAS) were evaluated. Different glass compositions close to and of the lowest eutectic (1170°C) composition within the CaO-Al2O3-SiO2-system have been melted from laboratory raw materials. Their compositions differed not more than 3 ma% in each component.

Density, Young's Modulus, and viscosity data have been evaluated. It was of special interest to get information of all these properties of the glasses and to see the effect of small changes in the composition of these glasses. The temperature attributed to a certain viscosity changes up to 100 K. The values of Young's Moduli were identical within the error limit. Density varied between 2.59 g/cm³ and 2.67 g/cm³. Density, Tg, and viscosity depend on the network structure. The largest effect was observed in T3, the temperature where the viscosity is 103 dPas.