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Dielectric permittivity of kaolinite heated to high temperatures |
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| Authors: | Karol Leluk Kazimierz Jerie Tadeusz S?onka |
| Affiliation: | a Faculty of Chemistry, University of Wroc?aw, 14F. Joliot-Curie, 50-383 Wroc?aw, Poland b Institute of Experimental Physics, University of Wroc?aw, Poland c Faculty of Chemistry, Wroc?aw University of Technology, Poland |
| Abstract: | Heating of kaolinite from the room temperature to 600 °C results in a gradual decrease in the dielectric permittivity. However, when the temperature rises to 1000 °C the high frequency permittivity of kaolinite increases surprisingly. We suppose that the decomposition of the material produces imperfections, which liberate a small distance movement of polar groups. Positron annihilation experiments performed in this material confirm the appearance of empty volumes after kaolinite calcination. |
| Keywords: | C. Positron annihilation spectroscopy D. Dielectric properties |
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