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Experimental vs. Theoretical Viscosity Determination of Aluminosilicate Glasses
Anna Zawada1, Malgorzata Lubas1, Adrian Nowak1
1Department of Materials Engineering, Czestochowa University of Technology, Armii Krajowej 19, 42-200 Czestochowa, Poland.
Materials (Basel, Switzerland)
|September 9, 2023
Summary
This study investigated glass mass viscosity using natural raw materials and recycled cullet. The two-point method effectively determines viscosity curves for aluminosilicate glass forming.
Area of Science:
- Materials Science
- Glass Science
- Chemical Engineering
Background:
- Viscosity is a critical parameter for glass melting and forming processes.
- Understanding viscosity-temperature relationships is essential for optimizing glass production.
Purpose of the Study:
- To determine the viscosity of glass melts based on natural raw materials modified with float glass cullet.
- To evaluate and compare different methods for viscosity determination.
- To establish the relationship between glass composition, ion incorporation, and viscosity.
Main Methods:
- Melting of six glass compositions in an electric furnace at 1450 °C.
- Viscosity determination using dilatometry, high-temperature microscopy, and theoretical calculations.
- Analysis of amphoteric ion (Al3+, Fe3+, Mg2+) incorporation into the glass structure.
Main Results:
- Viscosity was measured across various temperature ranges for modified glass compositions.
- Comparative analysis validated the suitability of different viscosity measurement techniques.
- The influence of Al3+, Fe3+, and Mg2+ on viscosity at specific temperature points (10^4 and 10^13 dPa·s) was elucidated.
Conclusions:
- The two-point method, using viscosity points of 10^4 and 10^13 dPa·s, is suitable for plotting accurate viscosity curves for aluminosilicate glass forming.
- The incorporation of specific ions significantly impacts glass viscosity within critical temperature ranges.
- This research provides valuable data for optimizing the processing of novel glass formulations.
Keywords:
aluminosilicate glassesglass culletmelting processnatural raw materialstheoretical calculation methodsviscosityMore Related Videos
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