Viscosity of transient glass-forming melt and its relation to foaming during batch-to-glass conversion

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985891%3A_____%2F24%3A00586153" target="_blank" >RIV/67985891:_____/24:00586153 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/60461373:22310/24:43930978

Výsledek na webu

<a href="https://doi.org/10.1016/j.matlet.2024.136284" target="_blank" >https://doi.org/10.1016/j.matlet.2024.136284</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.matlet.2024.136284" target="_blank" >10.1016/j.matlet.2024.136284</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Viscosity of transient glass-forming melt and its relation to foaming during batch-to-glass conversion

Popis výsledku v původním jazyce

Primary foam, which affects the heat transfer into the glass batch and the final glass quality, occurs when a sufficient quantity of transient glass-forming melt evolves with viscosity low enough to close the open porosity of the reacting glass batch. To better understand how the fraction of transient melt and its viscosity affect the primary foam temperature range, we determined, with x-ray diffraction, the fraction and composition of the transient glass-forming melt in a heated waste glass melter feed as a function of temperature. Then we prepared a set of transient melts that occurred within the foaming temperature interval and measured their viscosities with spindle and falling sphere viscometers. The results agree with the Adam-Gibbs and VFT viscosity-composition models, even for transient melt compositions outside of the models' compositional validity range. As silica and other refractory particles dissolved in the predominantly borate transient melt while temperature increased, viscosity increased from the initial value of - 500 Pa s at the onset of foaming (-650 degrees C) to a maximum of 770 Pa s when silica dissolution was almost complete (-700 degrees C). As temperature increased further, transient melt viscosity decreased to - 220 Pa s (-850 degrees C) when the primary foam collapsed.

Název v anglickém jazyce

Viscosity of transient glass-forming melt and its relation to foaming during batch-to-glass conversion

Popis výsledku anglicky

Primary foam, which affects the heat transfer into the glass batch and the final glass quality, occurs when a sufficient quantity of transient glass-forming melt evolves with viscosity low enough to close the open porosity of the reacting glass batch. To better understand how the fraction of transient melt and its viscosity affect the primary foam temperature range, we determined, with x-ray diffraction, the fraction and composition of the transient glass-forming melt in a heated waste glass melter feed as a function of temperature. Then we prepared a set of transient melts that occurred within the foaming temperature interval and measured their viscosities with spindle and falling sphere viscometers. The results agree with the Adam-Gibbs and VFT viscosity-composition models, even for transient melt compositions outside of the models' compositional validity range. As silica and other refractory particles dissolved in the predominantly borate transient melt while temperature increased, viscosity increased from the initial value of - 500 Pa s at the onset of foaming (-650 degrees C) to a maximum of 770 Pa s when silica dissolution was almost complete (-700 degrees C). As temperature increased further, transient melt viscosity decreased to - 220 Pa s (-850 degrees C) when the primary foam collapsed.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20504 - Ceramics

Projekt

<a href="/cs/project/LUAUS23062" target="_blank" >LUAUS23062: Experimentální a matematická analýza vlastností primární sklotvorné taveniny, vývoje plynů, a jejich vztahu k množství vyvinuté primární pěny.</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2024

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Materials Letters

ISSN

0167-577X

e-ISSN

1873-4979

Svazek periodika

363

Číslo periodika v rámci svazku

MAY

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

4

Strana od-do

136284

Kód UT WoS článku

001218965900001

EID výsledku v databázi Scopus

2-s2.0-85187221954