Evolution of phase composition, porosity and elastic properties during sintering and temperature dependence of Young's modulus of kaolin-calcite-based porous anorthite ceramics (CaO-SiO2-Al2O3 system)

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388980%3A_____%2F25%3A00637967" target="_blank" >RIV/61388980:_____/25:00637967 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/60461373:22310/25:43932925

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0272884225036119" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0272884225036119</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.ceramint.2025.07.343" target="_blank" >10.1016/j.ceramint.2025.07.343</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Evolution of phase composition, porosity and elastic properties during sintering and temperature dependence of Young's modulus of kaolin-calcite-based porous anorthite ceramics (CaO-SiO2-Al2O3 system)

Popis výsledku v původním jazyce

The evolution of Young's modulus during sintering to 900–1300 °C of mixtures of 80 wt% kaolin (two types: fine quartz-poor, coarse quartz-rich) and 20 wt% calcite is investigated using the impulse excitation technique/IET. While both materials are dominated by anorthite (66–80 wt%) after sintering above 1200 °C, there are major differences concerning quartz content, glass phase content and porosity (37–43 %). Changes in the phase composition are reflected in shrinkage and density, whereas porosity is almost unaffected. The room temperature values of elastic constants increase with increasing sintering temperature, with Young's modulus being close to the exponential prediction. The Young's modulus evolution during sintering to 1200 °C, monitored by temperature-dependent IET measurements, reveals all important processes (kaolinite dehydroxylation, calcite decomposition, gehlenite formation etc.). IET measurements of the temperature dependence of Young's modulus of as-sintered ceramics reveal significant differences in the behavior of the two materials.

Název v anglickém jazyce

Evolution of phase composition, porosity and elastic properties during sintering and temperature dependence of Young's modulus of kaolin-calcite-based porous anorthite ceramics (CaO-SiO2-Al2O3 system)

Popis výsledku anglicky

The evolution of Young's modulus during sintering to 900–1300 °C of mixtures of 80 wt% kaolin (two types: fine quartz-poor, coarse quartz-rich) and 20 wt% calcite is investigated using the impulse excitation technique/IET. While both materials are dominated by anorthite (66–80 wt%) after sintering above 1200 °C, there are major differences concerning quartz content, glass phase content and porosity (37–43 %). Changes in the phase composition are reflected in shrinkage and density, whereas porosity is almost unaffected. The room temperature values of elastic constants increase with increasing sintering temperature, with Young's modulus being close to the exponential prediction. The Young's modulus evolution during sintering to 1200 °C, monitored by temperature-dependent IET measurements, reveals all important processes (kaolinite dehydroxylation, calcite decomposition, gehlenite formation etc.). IET measurements of the temperature dependence of Young's modulus of as-sintered ceramics reveal significant differences in the behavior of the two materials.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10402 - Inorganic and nuclear chemistry

Projekt

<a href="/cs/project/GA22-25562S" target="_blank" >GA22-25562S: Impulzní excitace jako nekonvenční metoda k monitorování fázových přeměn a mikrostrukturních změn během tepelného zatížení materiálů</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

Ceramics International

ISSN

0272-8842

e-ISSN

1873-3956

Svazek periodika

51

Číslo periodika v rámci svazku

25C

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

21

Strana od-do

46369-46389

Kód UT WoS článku

001583822800015

EID výsledku v databázi Scopus

2-s2.0-105011854811