The evolution of structure induced by intensive milling in the system 2Bi 2 O 3 · 3TiO 2
Само за регистроване кориснике
2006
Чланак у часопису (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
Concurrent mechanochemical treatment of either a stoichiometric 2Bi 2 O 3 · 3TiO 2 powder mixture or (pulverized) Bi 4 Ti 3 O 12 compound was performed in a planetary ball mill. Relevant structural parameters: crystallite size, amount of amorphous phase and the transformed fraction (as a result of chemical reaction between Bi 2 O 3 and TiO 2 ) of the powders milled for various milling times and intensities were derived from X-ray powder diffraction data. The obtained structural parameters were used to follow the kinetics of the reduction of crystallite size, amorphous phase formation and chemical reaction. In the powder mixture, during the early stage of mechanochemical treatment the Bi 2 (CO 3 )O 2 phase was found as an intermediate product which transformed into the highly amorphized Bi 4 Ti 3 O 12 phase as the milling progressed. On the other hand, mechanochemical treatment of Bi 4 Ti 3 O 12 powder induced a gradual deformation of the crystal lattice and destruction of the perovskit...e-type structure. However, in both cases, after a certain milling time, a very disordered, amorphous/nanocrystalline structure was obtained. It was demonstrated that in the steady state, the amorphous/nanocrystalline phase ratio depends on the milling conditions. Higher milling intensities induce 'nanocrystallization' of the amorphous phase, i.e., precipitation of crystallites with an average size below 20 nm. A kinetic model involving a nanocrystalline ↔ amorphous reaction, in which the forward and reverse reaction were first-order was postulated and used to analyze the formation of an amorphous phase.
Кључне речи:
Ferroelectric / Nanocrystals / Titanates / X-ray diffractionИзвор:
Journal of Non-Crystalline Solids, 2006, 352, 28-29, 3058-3068Издавач:
- Elsevier
Финансирање / пројекти:
- Структурнe и магнетне особине наночестичних и поликристалних оксида ретких земаља и 3d метала. (RS-MESTD-MPN2006-2010-141027)
- Структурна и функционална хемија неких прелазних и постпрелазних елемената (RS-MESTD-MPN2006-2010-142030)
DOI: 10.1016/j.jnoncrysol.2006.03.072
ISSN: 0022-3093
WoS: 000239375000018
Scopus: 2-s2.0-33745829399
Институција/група
Tehnološko-metalurški fakultetTY - JOUR AU - Zdujić, Miodrag AU - Poleti, Dejan AU - Jovalekić, Čedomir AU - Karanović, Ljiljana PY - 2006 UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5466 AB - Concurrent mechanochemical treatment of either a stoichiometric 2Bi 2 O 3 · 3TiO 2 powder mixture or (pulverized) Bi 4 Ti 3 O 12 compound was performed in a planetary ball mill. Relevant structural parameters: crystallite size, amount of amorphous phase and the transformed fraction (as a result of chemical reaction between Bi 2 O 3 and TiO 2 ) of the powders milled for various milling times and intensities were derived from X-ray powder diffraction data. The obtained structural parameters were used to follow the kinetics of the reduction of crystallite size, amorphous phase formation and chemical reaction. In the powder mixture, during the early stage of mechanochemical treatment the Bi 2 (CO 3 )O 2 phase was found as an intermediate product which transformed into the highly amorphized Bi 4 Ti 3 O 12 phase as the milling progressed. On the other hand, mechanochemical treatment of Bi 4 Ti 3 O 12 powder induced a gradual deformation of the crystal lattice and destruction of the perovskite-type structure. However, in both cases, after a certain milling time, a very disordered, amorphous/nanocrystalline structure was obtained. It was demonstrated that in the steady state, the amorphous/nanocrystalline phase ratio depends on the milling conditions. Higher milling intensities induce 'nanocrystallization' of the amorphous phase, i.e., precipitation of crystallites with an average size below 20 nm. A kinetic model involving a nanocrystalline ↔ amorphous reaction, in which the forward and reverse reaction were first-order was postulated and used to analyze the formation of an amorphous phase. PB - Elsevier T2 - Journal of Non-Crystalline Solids T1 - The evolution of structure induced by intensive milling in the system 2Bi 2 O 3 · 3TiO 2 EP - 3068 IS - 28-29 SP - 3058 VL - 352 DO - 10.1016/j.jnoncrysol.2006.03.072 ER -
@article{ author = "Zdujić, Miodrag and Poleti, Dejan and Jovalekić, Čedomir and Karanović, Ljiljana", year = "2006", abstract = "Concurrent mechanochemical treatment of either a stoichiometric 2Bi 2 O 3 · 3TiO 2 powder mixture or (pulverized) Bi 4 Ti 3 O 12 compound was performed in a planetary ball mill. Relevant structural parameters: crystallite size, amount of amorphous phase and the transformed fraction (as a result of chemical reaction between Bi 2 O 3 and TiO 2 ) of the powders milled for various milling times and intensities were derived from X-ray powder diffraction data. The obtained structural parameters were used to follow the kinetics of the reduction of crystallite size, amorphous phase formation and chemical reaction. In the powder mixture, during the early stage of mechanochemical treatment the Bi 2 (CO 3 )O 2 phase was found as an intermediate product which transformed into the highly amorphized Bi 4 Ti 3 O 12 phase as the milling progressed. On the other hand, mechanochemical treatment of Bi 4 Ti 3 O 12 powder induced a gradual deformation of the crystal lattice and destruction of the perovskite-type structure. However, in both cases, after a certain milling time, a very disordered, amorphous/nanocrystalline structure was obtained. It was demonstrated that in the steady state, the amorphous/nanocrystalline phase ratio depends on the milling conditions. Higher milling intensities induce 'nanocrystallization' of the amorphous phase, i.e., precipitation of crystallites with an average size below 20 nm. A kinetic model involving a nanocrystalline ↔ amorphous reaction, in which the forward and reverse reaction were first-order was postulated and used to analyze the formation of an amorphous phase.", publisher = "Elsevier", journal = "Journal of Non-Crystalline Solids", title = "The evolution of structure induced by intensive milling in the system 2Bi 2 O 3 · 3TiO 2", pages = "3068-3058", number = "28-29", volume = "352", doi = "10.1016/j.jnoncrysol.2006.03.072" }
Zdujić, M., Poleti, D., Jovalekić, Č.,& Karanović, L.. (2006). The evolution of structure induced by intensive milling in the system 2Bi 2 O 3 · 3TiO 2. in Journal of Non-Crystalline Solids Elsevier., 352(28-29), 3058-3068. https://doi.org/10.1016/j.jnoncrysol.2006.03.072
Zdujić M, Poleti D, Jovalekić Č, Karanović L. The evolution of structure induced by intensive milling in the system 2Bi 2 O 3 · 3TiO 2. in Journal of Non-Crystalline Solids. 2006;352(28-29):3058-3068. doi:10.1016/j.jnoncrysol.2006.03.072 .
Zdujić, Miodrag, Poleti, Dejan, Jovalekić, Čedomir, Karanović, Ljiljana, "The evolution of structure induced by intensive milling in the system 2Bi 2 O 3 · 3TiO 2" in Journal of Non-Crystalline Solids, 352, no. 28-29 (2006):3058-3068, https://doi.org/10.1016/j.jnoncrysol.2006.03.072 . .