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The evolution of structure induced by intensive milling in the system 2Bi 2 O 3 · 3TiO 2

Authorized Users Only
2006
Authors
Zdujić, Miodrag
Poleti, Dejan
Jovalekić, Čedomir
Karanović, Ljiljana
Article (Published version)
Metadata
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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 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.

Keywords:
Ferroelectric / Nanocrystals / Titanates / X-ray diffraction
Source:
Journal of Non-Crystalline Solids, 2006, 352, 28-29, 3058-3068
Publisher:
  • Elsevier
Funding / projects:
  • Strukturne i magnetne osobine nanočestičnih i polikristalnih oksida retkih zemalja i 3d metala. (RS-141027)
  • Strukturna i funkcionalna hemija nekih prelaznih i postprelaznih elemenata (RS-142030)

DOI: 10.1016/j.jnoncrysol.2006.03.072

ISSN: 0022-3093

WoS: 000239375000018

Scopus: 2-s2.0-33745829399
[ Google Scholar ]
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15
URI
http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5466
Collections
  • Radovi istraživača / Researchers’ publications (TMF)
Institution/Community
Tehnološko-metalurški fakultet
TY  - 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 . .

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