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

Result code in 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>

Alternative codes found

RIV/68407700:21110/20:00343970

Result on the web

<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>

Result language

angličtina

Original language name

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

Original language description

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.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

20501 - Materials engineering

Project

<a href="/en/project/GA20-01536S" target="_blank" >GA20-01536S: Controlled modification of mineralogical composition of ceramic body for improvement of its utility properties</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2020

Confidentiality

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

Name of the periodical

Materials

ISSN

1996-1944

e-ISSN

—

Volume of the periodical

13

Issue of the periodical within the volume

21

Country of publishing house

CH - SWITZERLAND

Number of pages

14

Pages from-to

1-14

UT code for WoS article

000589246800001

EID of the result in the Scopus database

2-s2.0-85095775695