Počet záznamů: 1
Young’s modulus of different illitic clays during heating and cooling stage of firing
- 1.
SYSNO ASEP 0539287 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Young’s modulus of different illitic clays during heating and cooling stage of firing Tvůrce(i) Húlan, T. (SK)
Štubňa, J. (SK)
Ondruška, J. (SK)
Csáki, Štefan (UFP-V) ORCID
Lukáč, František (UFP-V) ORCID
Mánik, M. (SK)
Vozár, L. (SK)
Ozolins, J. (LV)
Kaljuvee, T. (EE)
Trník, A. (CZ)Celkový počet autorů 10 Číslo článku 4968 Zdroj.dok. Materials. - : MDPI - ISSN 1996-1944
Roč. 13, č. 21 (2020), s. 1-14Poč.str. 14 s. Jazyk dok. eng - angličtina Země vyd. CH - Švýcarsko Klíč. slova Clay ; Illite ; Quartz ; Thermal expansion ; Young’s modulus Vědní obor RIV JP - Průmyslové procesy a zpracování Obor OECD Materials engineering Způsob publikování Open access Institucionální podpora UFP-V - RVO:61389021 UT WOS 000589246800001 EID SCOPUS 85095775695 DOI https://doi.org/10.3390/ma13214968 Anotace 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. Pracoviště Ústav fyziky plazmatu Kontakt Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975 Rok sběru 2021 Elektronická adresa https://www.mdpi.com/1996-1944/13/21/4968
Počet záznamů: 1