X-ray tomography of feed-to-glass transition of simulated borosilicate waste glasses

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985891%3A_____%2F17%3A00480538" target="_blank" >RIV/67985891:_____/17:00480538 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/60461373:22310/17:43914566

Výsledek na webu

<a href="http://dx.doi.org/10.1111/jace.14895" target="_blank" >http://dx.doi.org/10.1111/jace.14895</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1111/jace.14895" target="_blank" >10.1111/jace.14895</a>

Jazyk výsledku

angličtina

Název v původním jazyce

X-ray tomography of feed-to-glass transition of simulated borosilicate waste glasses

Popis výsledku v původním jazyce

High-level waste feed composition affects the overall melting rate by influencing the chemical, thermophysical, and morphological properties of a cold cap layer that floats on the molten glass where most feed-to-glass reactions occur. Data from X-ray computed tomography imaging of melting pellets comprised of a simulated high-aluminum feed reveal the morphology of bubbles, known as the primary foam, for various feed compositions at temperatures between 600 degrees C and 1040 degrees C. These feeds were formulated to make glasses with viscosities ranging from 0.5 to 9.5Pas at 1150 degrees C, which was accomplished by changing the SiO2/(B2O3+Na2O+Li2O) ratio in the final glass. Pellet dimensions and profile area, average and maximum bubble areas, bubble diameter, and void fraction were evaluated. The feed viscosity strongly affects the onset of the primary foaming and the foam collapse temperature. Despite the decreasing amount of gas-evolving components (Li2CO3, H3BO3, and Na2CO3), as the feed viscosity increases, the measured foam expansion rate does not decrease. This suggests that the primary foaming is not only affected by changes in the primary melt viscosity but also by the compositional reaction kinetic effects. The temperature-dependent foam morphological data will be used to inform cold cap model development for a high-level radioactive waste glass melter.

Název v anglickém jazyce

X-ray tomography of feed-to-glass transition of simulated borosilicate waste glasses

Popis výsledku anglicky

High-level waste feed composition affects the overall melting rate by influencing the chemical, thermophysical, and morphological properties of a cold cap layer that floats on the molten glass where most feed-to-glass reactions occur. Data from X-ray computed tomography imaging of melting pellets comprised of a simulated high-aluminum feed reveal the morphology of bubbles, known as the primary foam, for various feed compositions at temperatures between 600 degrees C and 1040 degrees C. These feeds were formulated to make glasses with viscosities ranging from 0.5 to 9.5Pas at 1150 degrees C, which was accomplished by changing the SiO2/(B2O3+Na2O+Li2O) ratio in the final glass. Pellet dimensions and profile area, average and maximum bubble areas, bubble diameter, and void fraction were evaluated. The feed viscosity strongly affects the onset of the primary foaming and the foam collapse temperature. Despite the decreasing amount of gas-evolving components (Li2CO3, H3BO3, and Na2CO3), as the feed viscosity increases, the measured foam expansion rate does not decrease. This suggests that the primary foaming is not only affected by changes in the primary melt viscosity but also by the compositional reaction kinetic effects. The temperature-dependent foam morphological data will be used to inform cold cap model development for a high-level radioactive waste glass melter.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20504 - Ceramics

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2017

Kód důvěrnosti údajů

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

Název periodika

Journal of the American Ceramic Society

ISSN

0002-7820

e-ISSN

—

Svazek periodika

100

Číslo periodika v rámci svazku

9

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

12

Strana od-do

3883-3894

Kód UT WoS článku

000409281400008

EID výsledku v databázi Scopus

2-s2.0-85019022647