Kinetic analysis of the formation of high-temperature phases in an illite-based ceramic body using thermodilatometry
| Autor: | Omar Al-Shantir, Tomáš Húlan, Tereza Václavů, Štefan Csáki, Anton Trník, Tomáš Ondro |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
Kinetic analysis Analytical chemistry Sintering 02 engineering and technology Activation energy engineering.material 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 010406 physical chemistry 0104 chemical sciences Atmosphere visual_art Illite visual_art.visual_art_medium engineering Thickening Dilatometer Ceramic Physical and Theoretical Chemistry 0210 nano-technology |
| Zdroj: | Journal of Thermal Analysis and Calorimetry. 138:2289-2294 |
| ISSN: | 1588-2926 1388-6150 |
| Popis: | A non-isothermal kinetic analysis of the sintering process of an illitic clay is studied by thermodilatometry. For this study, illitic clay with over 80 mass% of illite content, originated in the Fuzerradvany location in northeastern Hungary, is used as basic material. The measurements are performed using a push-rod dilatometer on compact samples with heating rates from 1 to 10 °C min−1 in dynamic N2 atmosphere. The Kissinger method is used for the parameterization of the process. The results show that the reaction sintering runs in several overlapping steps. The determined values of the apparent activation energy of the first step and second step are EA = (625 ± 18) kJ mol−1 and EA = (575 ± 14) kJ mol−1, respectively. The results also show that both reactions could be characterized by the thickening of long cylinders (needles) or growth of needles and plates of finite long dimensions. |
| Databáze: | OpenAIRE |
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