http://hdl.handle.net/20.500.12128/8272
Tytuł: | Dielectric relaxation of manganese modified Bi6Fe2Ti3O18 Aurivillius-type ceramics |
Autor: | Bartkowska, Joanna Agnieszka Bochenek, Dariusz |
Słowa kluczowe: | activation energy; Aurivillius phase; dielectric constant; dielectric relaxation; Vogel-Fulcher law |
Data wydania: | sty-2019 |
Źródło: | Archives of Metallurgy and Materials, Vol. 64, iss. 1 (2019), s. 221-225 |
Abstrakt: | The five-layer Aurivillius type structures with the general chemical formula Bi5Fe2-xMnxTi3O18, where x = 0, 0.6, 1.2 have been synthesized and tested. The SEM studies showed a significant increase in grain size in the manganese-modified Aurivillius type ceramic material (for x= 1.2). The increase in the amount of manganese ions (Mn3+) affects the decrease in the temperature at which the relaxation processes take place. Namely from 525 K (1 kHz) and 725 K (1 MHz) for BFT sample (x= 0) to 355 K (1 kHz) and 565 K (1 MHz) for BFM12T sample (x= 1.2). Using the Arrhenius’s law and the Vogel-Fulcher’s relationship the activation energy (Ea) and the relaxation time have been calculated. The value of Ea increases with the increase of the Mn amount from 0.737 eV (for x= 0) to 0.915 eV (for x= 1.2). |
URI: | http://hdl.handle.net/20.500.12128/8272 |
DOI: | 10.24425/amm.2019.126241 |
ISSN: | 1733-3490 |
Pojawia się w kolekcji: | Artykuły (WNŚiT) |
Plik | Opis | Rozmiar | Format | |
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Bartkowska_Dielectric_relaxation_of_manganese_modified.pdf | 3,79 MB | Adobe PDF | Przejrzyj / Otwórz |
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