Evolution of Young's modulus and damping of Czech kaolins during sintering monitored via impulse excitation

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388980%3A_____%2F24%3A00585868" target="_blank" >RIV/61388980:_____/24:00585868 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/60461373:22310/24:43929042

Výsledek na webu

<a href="https://doi.org/10.1016/j.jeurceramsoc.2024.04.019" target="_blank" >https://doi.org/10.1016/j.jeurceramsoc.2024.04.019</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jeurceramsoc.2024.04.019" target="_blank" >10.1016/j.jeurceramsoc.2024.04.019</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Evolution of Young's modulus and damping of Czech kaolins during sintering monitored via impulse excitation

Popis výsledku v původním jazyce

The evolution of Young's modulus and damping is investigated for Czech kaolins in situ via the impulse excitation technique (IET) from room temperature to 1250 and 1400 °C. During heating the processes of drying, dehydroxylation, spinel formation, mullitization, silica release and glass melting are clearly discernible. During cooling Young's modulus increases, exhibiting a flat maximum around 800 °C and a steep decrease below 200 °C when the cristobalite content is high. Differential IET curves are introduced as a new representation of IET results, and damping curves are shown to provide additional information. The phase composition is determined via XRD, including the glass phase. Based on the densities, Young's moduli and volume fractions of the individual phases, the densities and Young's moduli of the kaolin-based ceramics are calculated and compared to theoretical predictions, showing that Young's modulus is nicely predicted by a benchmark relation for partially sintered ceramics with concave pores.

Název v anglickém jazyce

Evolution of Young's modulus and damping of Czech kaolins during sintering monitored via impulse excitation

Popis výsledku anglicky

The evolution of Young's modulus and damping is investigated for Czech kaolins in situ via the impulse excitation technique (IET) from room temperature to 1250 and 1400 °C. During heating the processes of drying, dehydroxylation, spinel formation, mullitization, silica release and glass melting are clearly discernible. During cooling Young's modulus increases, exhibiting a flat maximum around 800 °C and a steep decrease below 200 °C when the cristobalite content is high. Differential IET curves are introduced as a new representation of IET results, and damping curves are shown to provide additional information. The phase composition is determined via XRD, including the glass phase. Based on the densities, Young's moduli and volume fractions of the individual phases, the densities and Young's moduli of the kaolin-based ceramics are calculated and compared to theoretical predictions, showing that Young's modulus is nicely predicted by a benchmark relation for partially sintered ceramics with concave pores.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10402 - Inorganic and nuclear chemistry

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

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

Journal of the European Ceramic Society

ISSN

0955-2219

e-ISSN

1873-619X

Svazek periodika

44

Číslo periodika v rámci svazku

11

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

22

Strana od-do

6721-6742

Kód UT WoS článku

001240312900001

EID výsledku v databázi Scopus

2-s2.0-85190799256