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Földesová, M.; Lukáč, P.; Dillinger, P.; Bálek, V.; Svetík, Š.

doi:10.1023/a:1010121031760

Cited by 5 publications

(4 citation statements)

References 3 publications

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“…These spectral results are consistent with the fact that the three-dimensionally rigid crystal structure of zeolite is more stable than the layer structure of phyllosilicates [40]. Above the temperature of 1000 • C, the structure of zeolite is definitely destroyed and an amorphous phase is formed [21,33,41].…”

Section: Introductionsupporting

confidence: 72%

“…This means that physically bound water evaporates from the pores and surface of crystals. The second peak is also endothermic, and this reaction begins above 850 °C, when the structure of clinoptilolite is definitely destroyed and an amorphous phase is formed [33,41]. The influence of zeolite in the samples is visible on the enthalpy of reactions (dehydroxylation of kaolinite and Al-Si spinel formation) occurring in the kaolin-zeolite samples during thermal treatment (see Figure 3).…”

Section: Differential Scanning Calorimetrymentioning

confidence: 98%

“…This means that physically bound water evaporates from the pores and surface of crystals. The second peak is also endothermic, and this reaction begins above 850 • C, when the structure of clinoptilolite is definitely destroyed and an amorphous phase is formed [33,41]. Al-Si spinel or of spinel and/or mullite by [28] and by many papers extensively discussed in [31].…”

Section: Differential Scanning Calorimetrymentioning

confidence: 99%

“…Zeolites are microporous, hydrated crystalline aluminosilicates which are porous and widely used due to their structure and absorption properties. Many studies deal with natural or synthetic zeolites [32][33][34][35][36][37][38][39][40][41]. Usually, zeolites contain alkaline metals or metals of alkaline earth and frequently (e.g., in the case of clinoptilolite) crystallize in a monoclinic crystal system [32].…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2021

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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%.

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Section: Introductionsupporting

confidence: 72%

Section: Differential Scanning Calorimetrymentioning

confidence: 98%