Ceramics-Silikáty 44, (2) 61 - 65 (2000) |
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THE REDOX DISTRIBUTION AT THE INTERFACE OF GLASS MELTS WITH DIFFERENT OXIDATION STATE
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Kloužek Jaroslav 1, Ullrich Jiří 2, Jiřička Miloš 1,
Rohanová Dana 1,
Tonthat Thuan 3
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1 Laboratory of Inorganic Materials, Institute of Chemical Technology, Technicka 5,
166 28 Prague, Czech Republic
2 Glass Service, Rokytnice 60, 755 01 Vsetin, Czech Republic
3 BSN GLASSPACK, Research Center Saint-Romain-en-Gier, BP16,
F-69702 Givors Cedex 02, France
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A simplified computational model of refining gas transfer through the quiescent plane interface between oxidized and reduced
glass melts containing sulfur compounds as refining agents is presented. The results of calculations show no oversaturation
of glasses by gases, namely by SO₂, in the vicinity of the interface. This was confirmed by laboratory experiments that did not
detect any bubble nucleation in the interface region. However, if the glasses were quickly mixed by stirring, a considerable
amount of bubbles evolved in the melt. In addition, high glass oversaturation by SO₂ was calculated from redox equilibria for
instantaneously mixed glasses. |
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