Mechanochemical Reactions of Lithium Niobate Induced by High-Energy Ball-Milling
AbstractLithium niobate (LiNbO3, LN) nanocrystals were prepared by ball-milling of the crucible residue of a Czochralski grown congruent single crystal, using a Spex 8000 Mixer Mill with different types of vials (stainless steel, alumina, tungsten carbide) and various milling parameters. Dynamic light scattering and powder X-ray diffraction were used to determine the achieved particle and grain sizes, respectively. Possible contamination from the vials was checked by energy-dispersive X-ray spectroscopy measurements. Milling resulted in sample darkening due to mechanochemical reduction of Nb (V) via polaron and bipolaron formation, oxygen release and Li2O segregation, while subsequent oxidizing heat-treatments recovered the white color with the evaporation of Li2O and crystallization of a LiNb3O8 phase instead. The phase transformations occurring during both the grinding and the post-grinding heat treatments were studied by Raman spectroscopy, X-ray diffraction and optical reflection measurement, while the Li2O content of the as-ground samples was quantitatively measured by coulometric titration. View Full-Text
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Kocsor, L.; Péter, L.; Corradi, G.; Kis, Z.; Gubicza, J.; Kovács, L. Mechanochemical Reactions of Lithium Niobate Induced by High-Energy Ball-Milling. Crystals 2019, 9, 334.
Kocsor L, Péter L, Corradi G, Kis Z, Gubicza J, Kovács L. Mechanochemical Reactions of Lithium Niobate Induced by High-Energy Ball-Milling. Crystals. 2019; 9(7):334.Chicago/Turabian Style
Kocsor, Laura; Péter, László; Corradi, Gábor; Kis, Zsolt; Gubicza, Jenő; Kovács, László. 2019. "Mechanochemical Reactions of Lithium Niobate Induced by High-Energy Ball-Milling." Crystals 9, no. 7: 334.
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