A-site substituted BiFeO3 ceramics: A study of structural and electrical properties
| Autor: | Nikita Karma, Poornima Karil, H. S. Dager, M. Saleem, Netram Kaurav |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
010302 applied physics
Diffraction Materials science Analytical chemistry 02 engineering and technology Crystal structure Dielectric 021001 nanoscience & nanotechnology 01 natural sciences visual_art Phase (matter) 0103 physical sciences visual_art.visual_art_medium Crystallite Ceramic Nyquist plot 0210 nano-technology High-κ dielectric |
| Zdroj: | Materials Today: Proceedings. 46:2335-2339 |
| ISSN: | 2214-7853 |
| DOI: | 10.1016/j.matpr.2021.04.418 |
| Popis: | This work presents the influence of La3+ and Sr2+ substitution at Bi-site of BiFeO3 in the sense of phase, crystal structure and dielectric properties. The Bi1-x (Lax-y Sry)FeO3 (x = 0.1, y = 0, 0.05) ceramics with perovskite structure were synthesized by standard solid state route. Phase analysis exploiting X–ray diffraction (XRD) data disclosed formation of single phased trigonal structure with R3c space group. The calculated lattice parameters for Bi0.9La0.1FeO3 ceramic were a = b = 5.5771 A and c = 13.8021 A and Bi0.9La0.05Sr0.05FeO3 ceramic were a = b = 5.5844 A and c = 13.8215 A which witness trigonal structure. The calculated average crystallite size for Bi0.9La0.1FeO3 and Bi0.9La0.05Sr0.05FeO3 ceramics were 47.39 nm and 31.20 nm respectively. The dielectric analysis reveals that both the ceramics to exhibit good dielectric behavior with high dielectric constant and lower tangential loss value. In addition, Cole-Cole plot (M′ vs. M′′) and Nyquist plot (Z′ vs Z′′) exposed the non-Debye behavior of the ceramics and distribution of different relaxation phenomena in the ceramics. |
| Databáze: | OpenAIRE |
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