Young’s modulus of different illitic clays during heating and cooling stage of firing

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389021%3A_____%2F20%3A00539287" target="_blank" >RIV/61389021:_____/20:00539287 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68407700:21110/20:00343970

Výsledek na webu

<a href="https://www.mdpi.com/1996-1944/13/21/4968" target="_blank" >https://www.mdpi.com/1996-1944/13/21/4968</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3390/ma13214968" target="_blank" >10.3390/ma13214968</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Young’s modulus of different illitic clays during heating and cooling stage of firing

Popis výsledku v původním jazyce

Dynamical thermomechanical analysis of 5 illite-based clays from deposits in Slovakia, Estonia, Latvia, and Hungary is presented. The clays consist of illite (37–80 mass%), quartz (12–48 mass%), K-feldspar (4–13 mass%), kaolinite (0–18 mass%), and calcite (0–3 mass%). Young’s modulus is measured during the heating and cooling stages of firing (25◦C → 1100◦C → 25◦C). The liberation of the physically bound water increases Young’s modulus by ∼70% for all studied clays. By increasing the temperature, dehydroxylation and the α → β transition of quartz take place without a significant effect on Young’s modulus. Sintering, which starts at 800◦C, leads to an intensive increase in Young’s modulus up to the highest temperature (1100◦C). The increase remains also in the early stage of cooling (1100◦C → 800◦C). This increase of Young’s modulus is also the result of solidification of the glassy phase, which is finished at ∼750◦C. A sharp minimum of Young’s modulus is observed at around the β → α transition of quartz. Then, Young’s modulus still decreases its value down to the room temperature. The physical processes observed during heating and cooling do not differ in nature for the studied clays. Values of Young’s modulus vary at around 8 GPa, up to 800◦C. During sintering, Young’s modulus reaches values from 30 GPa to 70 GPa for the studied clays. The microstructure and composition given by the origin of the clay play a cardinal role for the Young’s modulus of the final ceramic body.

Název v anglickém jazyce

Young’s modulus of different illitic clays during heating and cooling stage of firing

Popis výsledku anglicky

Dynamical thermomechanical analysis of 5 illite-based clays from deposits in Slovakia, Estonia, Latvia, and Hungary is presented. The clays consist of illite (37–80 mass%), quartz (12–48 mass%), K-feldspar (4–13 mass%), kaolinite (0–18 mass%), and calcite (0–3 mass%). Young’s modulus is measured during the heating and cooling stages of firing (25◦C → 1100◦C → 25◦C). The liberation of the physically bound water increases Young’s modulus by ∼70% for all studied clays. By increasing the temperature, dehydroxylation and the α → β transition of quartz take place without a significant effect on Young’s modulus. Sintering, which starts at 800◦C, leads to an intensive increase in Young’s modulus up to the highest temperature (1100◦C). The increase remains also in the early stage of cooling (1100◦C → 800◦C). This increase of Young’s modulus is also the result of solidification of the glassy phase, which is finished at ∼750◦C. A sharp minimum of Young’s modulus is observed at around the β → α transition of quartz. Then, Young’s modulus still decreases its value down to the room temperature. The physical processes observed during heating and cooling do not differ in nature for the studied clays. Values of Young’s modulus vary at around 8 GPa, up to 800◦C. During sintering, Young’s modulus reaches values from 30 GPa to 70 GPa for the studied clays. The microstructure and composition given by the origin of the clay play a cardinal role for the Young’s modulus of the final ceramic body.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20501 - Materials engineering

Projekt

<a href="/cs/project/GA20-01536S" target="_blank" >GA20-01536S: Řízená modifikace mineralogického složení keramického střepu za účelem zlepšení jeho užitných vlastností</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2020

Kód důvěrnosti údajů

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

Název periodika

Materials

ISSN

1996-1944

e-ISSN

—

Svazek periodika

13

Číslo periodika v rámci svazku

21

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

14

Strana od-do

1-14

Kód UT WoS článku

000589246800001

EID výsledku v databázi Scopus

2-s2.0-85095775695