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Updated: Mar 26, 2026
09:32
Cooling Rate Dependent Ellipsometry Measurements to Determine the Dynamics of Thin Glassy Films
Published on: January 26, 2016
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A-thermal elastic behavior of silicate glasses
Mohammed Kamel Rabia1, Simon Degioanni, Christine Martinet
1Laboratoire de Physique des rayonnements, Université d'Annaba, Faculté des Sciences, Département de Physique, BP12 Annaba, Algérie.
Summary
Intermediate silicate glasses exhibit temperature-independent elastic moduli, a property linked to their composition. This research identifies the a-thermal composition in sodium alumino-silicate glasses using Brillouin scattering and Raman spectroscopy.
Area of Science:
- Materials Science
- Solid State Physics
- Geochemistry
Background:
- Elastic moduli of silicate glasses vary with temperature and composition.
- Intermediate glasses possess temperature-independent elastic moduli over a broad range.
- Sodium alumino-silicate glasses, like albite, approach this a-thermal composition.
Purpose of the Study:
- Determine the a-thermal composition of intermediate silicate glasses.
- Investigate the structural origins of temperature-independent elastic moduli.
- Compare the behavior of silica and albite glass under thermal stress.
Main Methods:
- Brillouin frequency shift measurements versus temperature.
- In situ high-temperature Raman scattering.
- Structural analysis of silica and albite glass up to 600 °C.
Main Results:
- Silica exhibits an increase in elastic moduli with temperature due to 6-membered ring transformations.
- Albite glass shows a balancing effect between silica anomaly and anharmonicity.
- Substitution of Si(4+) by Al(3+) and Na(+) ions in albite reduces the proportion of anomalous 6-membered rings.
Conclusions:
- Albite glass represents an intermediate a-thermal glass due to balanced structural effects.
- The a-thermal property arises from the interplay between ring transformations and anharmonicity.
- Tailoring glass composition with network formers/modifiers can yield glasses with specific properties.
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