Temperature dependence of Young's modulus of kaolin-based silicate ceramics with mullite addition

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388980%3A_____%2F25%3A00618736" target="_blank" >RIV/61388980:_____/25:00618736 - isvavai.cz</a>
Alternative codes found
RIV/60461373:22310/25:43931699
Result on the web
<a href="https://hdl.handle.net/11104/0365733" target="_blank" >https://hdl.handle.net/11104/0365733</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.oceram.2025.100774" target="_blank" >10.1016/j.oceram.2025.100774</a>

Result language
angličtina
Original language name
Temperature dependence of Young's modulus of kaolin-based silicate ceramics with mullite addition
Original language description
The temperature dependence of Young's modulus of kaolin-based silicate ceramics with mullite addition fired at 1100, 1200, 1300, 1400 and 1500 °C is investigated using the impulse excitation technique (IET). A minimum is observed at around 1200 °C, followed by a steep increase to ∼120 GPa and a stepwise discontinuity at ∼1270 °C to final values of 60–70 GPa, which are retained up to 1500 °C. This peculiar behavior can be explained by the assumption that the glass melt is able to heal pre-existent microcracks and the softening of the glass phase leads to a splitting of the resonant frequency peak, i.e. a decoupling of the flexural vibrations of the interconnected mullite skeleton (67–75 wt. %) and the interskeletal glassy phase (24–28 wt. %), which finally leads to a discontinuity when the mullite crystals become disconnected and the microstructure of the material changes from bicontinuous to matrix-inclusion type.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10402 - Inorganic and nuclear chemistry

Project
<a href="/en/project/EH22_008%2F0004631" target="_blank" >EH22_008/0004631: Materials and technologies for sustainable development</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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