Dielectric Relaxation of Manganese Modified Bi6Fe2Ti3O18 Aurivillius Type Ceramics

• Autorzy: Bartkowska J. A. , Bochenek D.

Identyfikatory

DOI

10.24425/amm.2019.126241

• Języki publikacji: EN

Abstrakty

EN

The five-layer Aurivillius type structures with the general chemical formula Bi₅Fe_2-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 (E_a) and the relaxation time have been calculated. The value of E_a increases with the increase of the Mn amount from 0.737 eV (for x=0) to 0.915 eV (for x=1.2).

Słowa kluczowe

EN

activation energy; Aurivillius phase; dielectric constant; dielectric relaxation; Vogel-Fulcher law

• Wydawca: Institute of Metallurgy and Materials Science of Polish Academy of Sciences ; Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences
• Czasopismo: Archives of Metallurgy and Materials
• Rocznik: 2019
• Tom: Vol. 64, iss. 1
• Strony: 221--225
• Opis fizyczny: Bibliogr. 16 poz., fot., rys., tab.

Twórcy

autor

Bartkowska J. A.

• University of Silesia in Katowice, Faculty of Computer Science and Materials Science, Institute of Technology and Mechatronics, 12, Żytnia Str., 41-200 Sosnowiec, Poland

autor

Bochenek D.

• University of Silesia in Katowice, Faculty of Computer Science and Materials Science, Institute of Technology and Mechatronics, 12, Żytnia Str., 41-200 Sosnowiec, Poland

Bibliografia

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Uwagi

EN

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019).