A Feedback mechanism between crystals and bubbles in a RuO2-bearing melt - Archive ouverte HAL Access content directly
Conference Papers Year : 2022

A Feedback mechanism between crystals and bubbles in a RuO2-bearing melt

(1, 2, 3) , (1) , (1) , (1) , (1) , (3) , (2) , (2) , (2)
1
2
3

Abstract

Crystals are known to affect bubble behavior in natural and industrial oxide glass melts.[1] In volcanology, high crystal contents (c > 30 vol.%) may drastically increase the suspension viscosity, altering bubble dynamics severely enough to modify the eruptive style.[2] During industrial glass production, crystals may affect the process and the final product, if formed in an uncontrolled way. In this work, we investigate in laboratory-scale how a small crystallinity of nano-sized RuO2 (c  2 vol.%) modifies bubble behavior in a melt, generating a cyclic gas-release phenomenon. We conduct a series of experiments on a three-phase system composed of a borosilicate melt, bubbles, and RuO2 crystals. Optical microscopic investigation is performed on the products of thermal treatment at 1000 °C for different durations. Based on viscosity measurements, contact angle measurements, and numerical simulations, we propose a mechanism of entrainment of bubbles carrying crystals to the upper surface accompanied by crystal aggregation, and followed by an increase in viscosity to explain the observed phenomenon
Embargoed file
Embargoed file
0 1 3
Year Month Jours
Avant la publication

Dates and versions

cea-03776074 , version 1 (13-09-2022)

Identifiers

  • HAL Id : cea-03776074 , version 1

Cite

Luiz de Paula Pereira, Rafaël Bianchini Nuernberg, Olivier Podda, Norma-Maria Pereira Machado, Annabelle Laplace-Ploquin, et al.. A Feedback mechanism between crystals and bubbles in a RuO2-bearing melt. 26th International Commission on Glass XXVI International Congress, Jul 2022, Berlin, Germany. ⟨cea-03776074⟩
12 View
7 Download

Share

Gmail Facebook Twitter LinkedIn More