Cambridge 7th to 9th September
article posted 22 Apr 2015
Maxime PARAILLOUS is a graduate student at the University of Bordeaux since 2013. He is carrying his researches on thermal poling of various glass compositions. Previous to his Ph.D. activities, he studied at the ENSCBP (Graduate School of Chemistry, Biology and Physics) in Bordeaux, France.
Thermal poling structural characterization for soda-lime glass
Maxime Paraillous*1, M.Dussauze2,
A.Poulon1, T. Cardinal1
Thermal poling consists in the application of a strong electric field during a thermal treatment and can allow engineering the surface of well-studied optical materials such as soda lime silicate glass.
This process initiates the motion of mobile ions in glasses, inducing innovative ionic profile which are of potential interest for various applications.
This effect has been widely studied in silica but few systematic investigations have been conducted on other industrial soda-lime glasses.
Indeed, a high electric field applied under moderate heating induces alkali ions depletion beneath the surface, on a thickness varying from few hundred of nanometers to several tens of micrometers, depending on the glass composition and the treatment parameters.
Such simple process involves strong surface property modification.
In the present study, the thermal poling on soda-lime glasses has been investigated.
Physico-chemical techniques allowed us to clarify the mechanisms of structural rearrangements in the matrix and the resulting physical properties.
Glow Discharge Optical Emission Spectroscopy (GDOES) allowed us to demonstrate a multi-layered material structure with the presence of pure silica in extreme surface.
Micro-Raman and Infrared spectroscopy have been conducted in order to evidence the structural modification.
Ellipsometry and second-order harmonic generation enabled to establish clear correlation between the structural and optical properties of the resulting material.
Surface chemistry has been investigated. Specific surface wetting has been evaluated in the poled region.
These results bring new insights on the thermal poling process that could lead to significant advances on the surface treatment of industrial glasses.
1 Institute of Chemistry of the Condensed Matter (ICMCB), University of Bordeaux, 33608 Pessac - France
2 Institute of Molecular Science (ISM), University of Bordeaux, 33405 Talence - France