The influence of mechanical activation on the morphological changes of Fe/BaTiO3 powder
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Pavlović, Vera P.
Pavlović, Vladimir B.
Ristić, Momčilo M.
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Crystal structure and morphology of mechanically activated nanocrystalline Fe/BaTiO3 was investigated using a combination of spectroscopic and microscopic methods. These show that mechanical activation led to the creation of new surfaces and the comminution of the initial powder particles. Prolonged milling resulted in formation of larger agglomerates of BaTiO3 and bimodal particle size distribution, where BaTiO3 particles were significantly larger than those of iron-containing phases. Milling times of 210 min and above lead to a significant decrease in temperature of the oxidation of iron in the sample, indicating abrupt change in reactivity. Raman spectroscopy analysis has revealed that activation had a pronounced influence on Fe/BaTiO3 lattice, thereby affecting both the stability of the crystal structure and the phase transition phenomena.
Ključne reči:mechanical alloying / mechanical milling / scanning electron microscopy / Raman spectroscopy / multiferroic
Izvor:Materials Science and Engineering: B, 2016, 212, 89-95
- Usmerena sinteza, struktura i svojstva multifunkcionalnih materijala (RS-172057)
- Serbian Academy of Sciences and Arts, Project F-198
- United States National Science Foundation (NSF) / Centers of Research Excellence in Science and Technology (CREST), Grant HRD-0833184