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Reaction of soda-lime-silica glass melt with water vapour at melting temperatures
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SYSNO ASEP 0450569 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Reaction of soda-lime-silica glass melt with water vapour at melting temperatures Author(s) Vernerová, Miroslava (USMH-B) RID, ORCID
Kloužek, Jaroslav (USMH-B) RID, ORCID, SAI
Němec, Lubomír (USMH-B) RID, ORCIDSource Title Journal of Non-Crystalline Solids. - : Elsevier - ISSN 0022-3093
Roč. 416, MAY 15 (2015), s. 21-30Number of pages 10 s. Publication form Print - P Language eng - English Country NL - Netherlands Keywords glass melt ; sulfate ; water vapour ; bubble nucleation ; melt foaming ; glass melting Subject RIV JH - Ceramics, Fire-Resistant Materials and Glass R&D Projects TA01010844 GA TA ČR - Technology Agency of the Czech Republic (TA ČR) Institutional support USMH-B - RVO:67985891 UT WOS 000353093400004 EID SCOPUS 84924362010 DOI 10.1016/j.jnoncrysol.2015.02.020 Annotation The soda-lime-silica glass melt was exposed to an atmosphere with a high water vapour partial pressure at temperatures of 1400-1500 degrees C and the processes in the melt were observed and monitored using the high temperature observation method. The glass batch containing sulfates with carbon - so that the molar ratio between the carbon and sulfate ions in the batch varied between 0 and 9 - the batch without any fining agent and the batch with the addition of antimony oxide were prepared. The foaming and bubble nucleation on the level of the molten glass were observed in glasses with sulfate additions when the water vapour partial pressure in the atmosphere exceeded 50 kPa, but the bubble nucleation in the reduced glass was observed also at a lower partial pressure. The bubble nucleation intensity increased with temperature. No bubble nucleation was observed in the melts with antimony oxide or in the melt without any fining agent. The bubbles nucleated on the glass level in both the oxidized and reduced melts with sulfate additions grew by a growth rate exceeding the bubble growth rate in the volume of glass by almost one order of magnitude. The unstable but rapidly renewed foam subsequently spread over the glass level. The most intensive foaming was observed in the glass melt without carbon and in the slightly reduced glass. The mechanism of the reaction between water vapour and glas is discussed in terms of a controlling process as well as its impact on the glass melting process. Workplace Institute of Rock Structure and Mechanics Contact Iva Švihálková, svihalkova@irsm.cas.cz, Tel.: 266 009 216 Year of Publishing 2016
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