Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10629282 | Journal of the European Ceramic Society | 2016 | 9 Pages |
Abstract
BiFeO3 powders were synthesized by sonochemically assisted hydrothermal and hydro-evaporation methods. The X-ray diffraction confirmed the presence of secondary phases, Bi25FeO39 and Bi2Fe4O9, in as prepared BiFeO3 powders. Optimization of sintering conditions indicated that temperature of 800 °C and time of 2 h after pressing at 9 t/cm2 provided ceramics samples with the highest density (up to 96% of theoretical density) and the lowest content of secondary phases. Ferroelectric and magnetic characterization was performed on two selected ceramics samples with the highest densities. Ceramics obtained from the powder synthesized by the hydrothermal method showed greater lattice distortion along [1 1 1] axis and smaller grains, which resulted in larger values of electric polarization at room temperature. It also exhibited less Fe(3d)-O(2p) orbital overlapping due to a larger FeOFe bond angle, causing lower antiferromagnetic ordering and weak ferromagnetic behavior at low temperatures.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Danijela LukoviÄ GoliÄ, Aleksandar RadojkoviÄ, Jovana ÄirkoviÄ, Aleksandra DapÄeviÄ, Damir PajiÄ, Nikola TasiÄ, Slavica M. SaviÄ, Milica PoÄuÄa-NeÅ¡iÄ, Smilja MarkoviÄ, Goran BrankoviÄ, Zorica MarinkoviÄ StanojeviÄ, Zorica BrankoviÄ,