- Tytuł:
- Dielectric Relaxation of Manganese Modified Bi6Fe2Ti3O18 Aurivillius Type Ceramics
- Autorzy:
-
Bartkowska, J. A.
Bochenek, D. - Powiązania:
- https://bibliotekanauki.pl/articles/354618.pdf
- Data publikacji:
- 2019
- Wydawca:
- Polska Akademia Nauk. Czytelnia Czasopism PAN
- Tematy:
-
activation energy
Aurivillius phase
dielectric constant
dielectric relaxation
Vogel-Fulcher law - Opis:
- 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).
- Źródło:
-
Archives of Metallurgy and Materials; 2019, 64, 1; 221-225
1733-3490 - Pojawia się w:
- Archives of Metallurgy and Materials
- Dostawca treści:
- Biblioteka Nauki
Artykuł