PhD Defence of Luiz Pereira

The objective of this project is to determine quantitative parameters inducing the bubble nucleation (gas solubility, supersaturation and nucleation). The impact of the molten glass composition (redox) and temperature will be deeply investigated. Moreover, the role of heterogeneities present in the melt and which may promote nucleation phenomena will be considered. A specific experimental set-up will be implemented in order to in-situ monitor the bubbles formation associated with a molten glass redox state measurement. Post-mortem analyzes on the solidified material will also be performed (electronic microscopy, gas analyzes). In a second step, a basic modelling of the bubble nucleation may be considered using the previously acquired experimental results.

 

Keywords:

• Oxide melt
• Bubbles
• Redox reaction
• Experimental approach
• Numerical approach

On the left, a population of bubbles in a borosilicate melt at 1200°c, in situ camera imaging device
On the right,a population of bubbles in a borosilicate melt at 1050°c, optical microscopy