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Volume 11
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10.3390/cryst11020165
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Correction published on 27 January 2026, see Crystals 2026, 16(2), 89.
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Article

Thermophysical Properties of Kaolin–Zeolite Blends up to 1100 °C

by
Ján Ondruška
1,
Tomáš Húlan
1,
Ivana Sunitrová
1,
Štefan Csáki
2,
Grzegorz Łagód
3,
Alena Struhárová
4 and
Anton Trník
1,5,*
1
Department of Physics, Faculty of Natural Sciences, Constantine the Philosopher University in Nitra, Tr. A. Hlinku 1, 94974 Nitra, Slovakia
2
Institute of Plasma Physics, Czech Academy of Sciences, Za Slovankou 3, 18200 Prague, Czech Republic
3
Faculty of Environmental Engineering, Lublin University of Technology, Nadbystrzycka 40B, 20-618 Lublin, Poland
4
Department of Materials Engineering and Physics, Faculty of Civil Engineering, Slovak University of Technology, Radlinskeho 11, 81005 Bratislava, Slovakia
5
Department of Materials Engineering and Chemistry, Faculty of Civil Engineering, Czech Technical University in Prague, Thákurova 7, 16629 Prague, Czech Republic
*
Author to whom correspondence should be addressed.
Crystals 2021, 11(2), 165; https://doi.org/10.3390/cryst11020165
Submission received: 4 January 2021 / Revised: 2 February 2021 / Accepted: 3 February 2021 / Published: 7 February 2021 / Corrected: 27 January 2026
(This article belongs to the Special Issue Zeolites)
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Abstract

In this study, the thermophysical properties such as the thermal expansion, thermal diffusivity and conductivity, and specific heat capacity of ceramic samples made from kaolin and natural zeolite are investigated up to 1100 °C. The samples were prepared from Sedlec kaolin (Czech Republic) and natural zeolite (Nižný Hrabovec, Slovakia). Kaolin was partially replaced with a natural zeolite in the amounts of 10, 20, 30, 40, and 50 mass%. The measurements were performed on cylindrical samples using thermogravimetric analysis, a horizontal pushrod dilatometer, and laser flash apparatus. The results show that zeolite in the samples decreases the values of all studied properties (except thermal expansion), which is positive for bulk density, porosity, thermal diffusivity, and conductivity. It has a negative effect for thermal expansion because shrinkage increases with the zeolite content. Therefore, the optimal amount of zeolite in the sample (according to the studied properties) is 30 mass%.
Keywords: kaolin; zeolite; kaolinite; clinoptilolite; thermal expansion; thermal diffusivity; thermal conductivity; specific heat capacity kaolin; zeolite; kaolinite; clinoptilolite; thermal expansion; thermal diffusivity; thermal conductivity; specific heat capacity

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MDPI and ACS Style

Ondruška, J.; Húlan, T.; Sunitrová, I.; Csáki, Š.; Łagód, G.; Struhárová, A.; Trník, A. Thermophysical Properties of Kaolin–Zeolite Blends up to 1100 °C. Crystals 2021, 11, 165. https://doi.org/10.3390/cryst11020165

AMA Style

Ondruška J, Húlan T, Sunitrová I, Csáki Š, Łagód G, Struhárová A, Trník A. Thermophysical Properties of Kaolin–Zeolite Blends up to 1100 °C. Crystals. 2021; 11(2):165. https://doi.org/10.3390/cryst11020165

Chicago/Turabian Style

Ondruška, Ján, Tomáš Húlan, Ivana Sunitrová, Štefan Csáki, Grzegorz Łagód, Alena Struhárová, and Anton Trník. 2021. "Thermophysical Properties of Kaolin–Zeolite Blends up to 1100 °C" Crystals 11, no. 2: 165. https://doi.org/10.3390/cryst11020165

APA Style

Ondruška, J., Húlan, T., Sunitrová, I., Csáki, Š., Łagód, G., Struhárová, A., & Trník, A. (2021). Thermophysical Properties of Kaolin–Zeolite Blends up to 1100 °C. Crystals, 11(2), 165. https://doi.org/10.3390/cryst11020165

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