TY  - JOUR
AU  - Ilić, Svetlana M.
AU  - Zec, Slavica
AU  - Miljkovic, M.
AU  - Poleti, Dejan
AU  - Pošarac-Marković, Milica B.
AU  - Janaćković, Đorđe T.
AU  - Matović, Branko
PY  - 2014
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/6089
AB  - Amorphous powders of iron doped 3:2 mullite (3Al(2)O(3)center dot 2SiO(2)) were prepared by sol-gel combustion process using ethanol-water solutions of Al(III) nitrate, Fe(III) nitrate, TEOS and urea. Compositions up to 15 wt% of Fe2O3 were investigated. After combustion and heat treatment at 800 degrees C for 4 h, XRD analysis confirmed that the powders were amorphous. This is in agreement with the thermodynamic predictions that direct formation of mullite has not occurred during the aluminum nitrate - urea combustion reaction. XRD patterns of uniaxially pressed and sintered pellets at 1550 degrees C for 4 h revealed the crystal structure of orthorhombic mullite. The lattice parameters and unit cell volume increases as the mullite solid solutions were enriched by iron. The TGA/DSC analysis showed the reducing of crystallization temperature of iron doped mullites with increasing of iron content in reaction mixtures. The mullitization reaction is two-step process including formation of transient spinel phase below 1000 degrees C and mullite crystallization at temperatures about 1200 degrees C. The SEM micrographs of the sintered samples reveal elongated mullite grains with grain length up to 40 mu m. Increasing of the iron content in the reaction mixture enhances the grain size and the grains become elongated and better packed increasing the density of sintered samples. (C) 2014 Elsevier B.V. All rights reserved.
T2  - Journal of Alloys and Compounds
T1  - Sol-gel synthesis and characterization of iron doped mullite
VL  - 612
SP  - 259
EP  - 264
DO  - 10.1016/j.jallcom.2014.05.204
ER  - 

@article{
author = "Ilić, Svetlana M. and Zec, Slavica and Miljkovic, M. and Poleti, Dejan and Pošarac-Marković, Milica B. and Janaćković, Đorđe T. and Matović, Branko",
year = "2014",
abstract = "Amorphous powders of iron doped 3:2 mullite (3Al(2)O(3)center dot 2SiO(2)) were prepared by sol-gel combustion process using ethanol-water solutions of Al(III) nitrate, Fe(III) nitrate, TEOS and urea. Compositions up to 15 wt% of Fe2O3 were investigated. After combustion and heat treatment at 800 degrees C for 4 h, XRD analysis confirmed that the powders were amorphous. This is in agreement with the thermodynamic predictions that direct formation of mullite has not occurred during the aluminum nitrate - urea combustion reaction. XRD patterns of uniaxially pressed and sintered pellets at 1550 degrees C for 4 h revealed the crystal structure of orthorhombic mullite. The lattice parameters and unit cell volume increases as the mullite solid solutions were enriched by iron. The TGA/DSC analysis showed the reducing of crystallization temperature of iron doped mullites with increasing of iron content in reaction mixtures. The mullitization reaction is two-step process including formation of transient spinel phase below 1000 degrees C and mullite crystallization at temperatures about 1200 degrees C. The SEM micrographs of the sintered samples reveal elongated mullite grains with grain length up to 40 mu m. Increasing of the iron content in the reaction mixture enhances the grain size and the grains become elongated and better packed increasing the density of sintered samples. (C) 2014 Elsevier B.V. All rights reserved.",
journal = "Journal of Alloys and Compounds",
title = "Sol-gel synthesis and characterization of iron doped mullite",
volume = "612",
pages = "259-264",
doi = "10.1016/j.jallcom.2014.05.204"
}

Ilić, S. M., Zec, S., Miljkovic, M., Poleti, D., Pošarac-Marković, M. B., Janaćković, Đ. T.,& Matović, B.. (2014). Sol-gel synthesis and characterization of iron doped mullite. in Journal of Alloys and Compounds, 612, 259-264.
https://doi.org/10.1016/j.jallcom.2014.05.204

Ilić SM, Zec S, Miljkovic M, Poleti D, Pošarac-Marković MB, Janaćković ĐT, Matović B. Sol-gel synthesis and characterization of iron doped mullite. in Journal of Alloys and Compounds. 2014;612:259-264.
doi:10.1016/j.jallcom.2014.05.204 .

Ilić, Svetlana M., Zec, Slavica, Miljkovic, M., Poleti, Dejan, Pošarac-Marković, Milica B., Janaćković, Đorđe T., Matović, Branko, "Sol-gel synthesis and characterization of iron doped mullite" in Journal of Alloys and Compounds, 612 (2014):259-264,
https://doi.org/10.1016/j.jallcom.2014.05.204 . .

TY  - JOUR
AU  - Matović, Branko
AU  - Babić, Biljana M.
AU  - Devečerski, Aleksandar
AU  - Radović, Marko B.
AU  - Minovic, A.
AU  - Miljkovic, M.
AU  - Bošković, Snežana B.
PY  - 2011
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4190
AB  - Nanocrystalline hexagonal boron nitride powder (h-BN) was synthesized by sol-gel polycondensation of resorcinol and formaldehyde in the presence of boric acid followed by freeze drying. Pyrolysis and subsequent heat treatment of these cryogels resulted in formation of boron nitride powder. Characterization by nitrogen adsorption showed that precomposite cryogels and the BN powders were micro and mesoporous materials with high surface areas. Materials have been analyzed by means of X-ray diffraction, Raman scattering and electron microscopy methods. (C) 2010 Elsevier B.V. All rights reserved.
T2  - Materials Letters
T1  - New synthetic route for nanocrystalline boron nitride powder
VL  - 65
IS  - 2
SP  - 307
EP  - 309
DO  - 10.1016/j.matlet.2010.10.005
ER  - 

@article{
author = "Matović, Branko and Babić, Biljana M. and Devečerski, Aleksandar and Radović, Marko B. and Minovic, A. and Miljkovic, M. and Bošković, Snežana B.",
year = "2011",
abstract = "Nanocrystalline hexagonal boron nitride powder (h-BN) was synthesized by sol-gel polycondensation of resorcinol and formaldehyde in the presence of boric acid followed by freeze drying. Pyrolysis and subsequent heat treatment of these cryogels resulted in formation of boron nitride powder. Characterization by nitrogen adsorption showed that precomposite cryogels and the BN powders were micro and mesoporous materials with high surface areas. Materials have been analyzed by means of X-ray diffraction, Raman scattering and electron microscopy methods. (C) 2010 Elsevier B.V. All rights reserved.",
journal = "Materials Letters",
title = "New synthetic route for nanocrystalline boron nitride powder",
volume = "65",
number = "2",
pages = "307-309",
doi = "10.1016/j.matlet.2010.10.005"
}

Matović, B., Babić, B. M., Devečerski, A., Radović, M. B., Minovic, A., Miljkovic, M.,& Bošković, S. B.. (2011). New synthetic route for nanocrystalline boron nitride powder. in Materials Letters, 65(2), 307-309.
https://doi.org/10.1016/j.matlet.2010.10.005

Matović B, Babić BM, Devečerski A, Radović MB, Minovic A, Miljkovic M, Bošković SB. New synthetic route for nanocrystalline boron nitride powder. in Materials Letters. 2011;65(2):307-309.
doi:10.1016/j.matlet.2010.10.005 .

Matović, Branko, Babić, Biljana M., Devečerski, Aleksandar, Radović, Marko B., Minovic, A., Miljkovic, M., Bošković, Snežana B., "New synthetic route for nanocrystalline boron nitride powder" in Materials Letters, 65, no. 2 (2011):307-309,
https://doi.org/10.1016/j.matlet.2010.10.005 . .

TY  - JOUR
AU  - Jokanović, Vukoman R.
AU  - Dramićanin, Miroslav
AU  - Andrić, Željka
AU  - Dramićanin, Tatjana
AU  - Plavsic, M.
AU  - Pašalić, Snežana
AU  - Miljkovic, M.
PY  - 2008
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/6732
AB  - A new approach to the two-level design and self-assembling of Me(x)SiO(y) (Me = Gd, Y and Ca or their mixtures) nano-powders from SiO(2) sols is described. The nanostructure design of various optical active materials based on different compounds of Me(x)Sio(y) is discussed. These particles were formed by the combination of hydrothermal synthesis and ultrasound spray pyrolysis. The morphology and structural design of the particles and sub-particles are defined by their synthesis procedure and processing parameters. The mean particle size and size distribution of all the Me(x)SiO(y) based compounds were determined by SEM analysis. These results were compared with the particle diameter evaluated from the theoretical model of the breaking-up of capillary waves. For all the synthesized powders, the obtained results indicate the possibility of a rigorous design of the structure of the particles throughout their entire hierarchy. (c) 2007 Elsevier B.V. All rights reserved.
T2  - Optical Materials
T1  - Nanostructure designed powders of optical active materials Me(x)SiO(y) obtained by ultrasonic spray pyrolysis
VL  - 30
IS  - 7
SP  - 1168
EP  - 1172
DO  - 10.1016/j.optmat.2007.05.043
ER  - 

@article{
author = "Jokanović, Vukoman R. and Dramićanin, Miroslav and Andrić, Željka and Dramićanin, Tatjana and Plavsic, M. and Pašalić, Snežana and Miljkovic, M.",
year = "2008",
abstract = "A new approach to the two-level design and self-assembling of Me(x)SiO(y) (Me = Gd, Y and Ca or their mixtures) nano-powders from SiO(2) sols is described. The nanostructure design of various optical active materials based on different compounds of Me(x)Sio(y) is discussed. These particles were formed by the combination of hydrothermal synthesis and ultrasound spray pyrolysis. The morphology and structural design of the particles and sub-particles are defined by their synthesis procedure and processing parameters. The mean particle size and size distribution of all the Me(x)SiO(y) based compounds were determined by SEM analysis. These results were compared with the particle diameter evaluated from the theoretical model of the breaking-up of capillary waves. For all the synthesized powders, the obtained results indicate the possibility of a rigorous design of the structure of the particles throughout their entire hierarchy. (c) 2007 Elsevier B.V. All rights reserved.",
journal = "Optical Materials",
title = "Nanostructure designed powders of optical active materials Me(x)SiO(y) obtained by ultrasonic spray pyrolysis",
volume = "30",
number = "7",
pages = "1168-1172",
doi = "10.1016/j.optmat.2007.05.043"
}

Jokanović, V. R., Dramićanin, M., Andrić, Ž., Dramićanin, T., Plavsic, M., Pašalić, S.,& Miljkovic, M.. (2008). Nanostructure designed powders of optical active materials Me(x)SiO(y) obtained by ultrasonic spray pyrolysis. in Optical Materials, 30(7), 1168-1172.
https://doi.org/10.1016/j.optmat.2007.05.043

Jokanović VR, Dramićanin M, Andrić Ž, Dramićanin T, Plavsic M, Pašalić S, Miljkovic M. Nanostructure designed powders of optical active materials Me(x)SiO(y) obtained by ultrasonic spray pyrolysis. in Optical Materials. 2008;30(7):1168-1172.
doi:10.1016/j.optmat.2007.05.043 .

Jokanović, Vukoman R., Dramićanin, Miroslav, Andrić, Željka, Dramićanin, Tatjana, Plavsic, M., Pašalić, Snežana, Miljkovic, M., "Nanostructure designed powders of optical active materials Me(x)SiO(y) obtained by ultrasonic spray pyrolysis" in Optical Materials, 30, no. 7 (2008):1168-1172,
https://doi.org/10.1016/j.optmat.2007.05.043 . .

TY  - CONF
AU  - Marković, Smilja
AU  - Mitrić, Miodrag
AU  - Jovalekić, Čedomir
AU  - Miljkovic, M.
PY  - 2007
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/6688
AB  - Multilayered BaTi1-xSnxO3 (BTS) ceramics with different Ti/Sn ratios were produced by pressing and sintering at 1420 degrees C for 2 hours. X-ray diffractometry, scanning electron microscopy and energy dispersive spectroscopy were used for structural, microstructural and elemental analysis, respectively. The dielectric and ferroelectric behavior of sintered samples was studied, too. It is found that in ingredient materials, with increasing Sri content, the tetragonality decreases; Curie temperature moves towards room temperature, while the maximum of the dielectric constant increases, and also, they becomes less hysteretic. It is noticed that multilayered BTS ceramics with different Ti/Sn contents have a broad transition temperature and show a relatively high dielectric constant in a wide temperature range. It is shown that dielectric properties of these materials may be modified by a combination of different BTS powders as well as layers number.
C3  - Materials Science Forum
T1  - Dielectric and ferroelectric properties of BaTi1-xSnxO3 multilayered ceramics
VL  - 555
SP  - 249
EP  - +
DO  - 10.4028/www.scientific.net/MSF.555.249
ER  - 

@conference{
author = "Marković, Smilja and Mitrić, Miodrag and Jovalekić, Čedomir and Miljkovic, M.",
year = "2007",
abstract = "Multilayered BaTi1-xSnxO3 (BTS) ceramics with different Ti/Sn ratios were produced by pressing and sintering at 1420 degrees C for 2 hours. X-ray diffractometry, scanning electron microscopy and energy dispersive spectroscopy were used for structural, microstructural and elemental analysis, respectively. The dielectric and ferroelectric behavior of sintered samples was studied, too. It is found that in ingredient materials, with increasing Sri content, the tetragonality decreases; Curie temperature moves towards room temperature, while the maximum of the dielectric constant increases, and also, they becomes less hysteretic. It is noticed that multilayered BTS ceramics with different Ti/Sn contents have a broad transition temperature and show a relatively high dielectric constant in a wide temperature range. It is shown that dielectric properties of these materials may be modified by a combination of different BTS powders as well as layers number.",
journal = "Materials Science Forum",
title = "Dielectric and ferroelectric properties of BaTi1-xSnxO3 multilayered ceramics",
volume = "555",
pages = "249-+",
doi = "10.4028/www.scientific.net/MSF.555.249"
}

Marković, S., Mitrić, M., Jovalekić, Č.,& Miljkovic, M.. (2007). Dielectric and ferroelectric properties of BaTi1-xSnxO3 multilayered ceramics. in Materials Science Forum, 555, 249-+.
https://doi.org/10.4028/www.scientific.net/MSF.555.249

Marković S, Mitrić M, Jovalekić Č, Miljkovic M. Dielectric and ferroelectric properties of BaTi1-xSnxO3 multilayered ceramics. in Materials Science Forum. 2007;555:249-+.
doi:10.4028/www.scientific.net/MSF.555.249 .

Marković, Smilja, Mitrić, Miodrag, Jovalekić, Čedomir, Miljkovic, M., "Dielectric and ferroelectric properties of BaTi1-xSnxO3 multilayered ceramics" in Materials Science Forum, 555 (2007):249-+,
https://doi.org/10.4028/www.scientific.net/MSF.555.249 . .

TY  - JOUR
AU  - Jugović, Dragana
AU  - Cvjetićanin, Nikola
AU  - Kusigerski, Vladan
AU  - Mitrić, Miodrag
AU  - Miljkovic, M.
AU  - Makovec, Darko
AU  - Uskoković, Dragan
PY  - 2007
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3172
AB  - Quaternary spinel oxide LiMn1.825Cr0.175O4 Powder was synthesized by using an ultrasonic spray pyrolysis method, without additional annealing. The crystal structure of the as-prepared powder was revealed by X-ray powder diffraction and identified as a single spinel phase with Fd3m space group. The powders had a spherical morphology with extremely smooth surface appearance and densely congested interior structure. Transmission electron microscopy confirmed that the particle consisted by the cohesion of the primary particles. Magnetic measurements performed in DC field in both zero-field-cooled and field-cooled regimes, as well as AC susceptibility experiments, show that system undergoes spin-glass transition at the freezing temperature T-f = 20 K. The value of the effective magnetic moment mu(eff) = 4.34 mu(B) Obtained from the Curie-Weiss fit in the high temperature region confirms the substitution of Mn3+ ions with Cr3+ ions. (C) 2006 Elsevier Ltd. All rights reserved.
T2  - Materials Research Bulletin
T1  - Structural and magnetic characterization of LiMn1.825Cr0.175O4 spinel obtained by ultrasonic spray pyrolysis
VL  - 42
IS  - 3
SP  - 515
EP  - 522
DO  - 10.1016/j.materresbull.2006.06.018
ER  - 

@article{
author = "Jugović, Dragana and Cvjetićanin, Nikola and Kusigerski, Vladan and Mitrić, Miodrag and Miljkovic, M. and Makovec, Darko and Uskoković, Dragan",
year = "2007",
abstract = "Quaternary spinel oxide LiMn1.825Cr0.175O4 Powder was synthesized by using an ultrasonic spray pyrolysis method, without additional annealing. The crystal structure of the as-prepared powder was revealed by X-ray powder diffraction and identified as a single spinel phase with Fd3m space group. The powders had a spherical morphology with extremely smooth surface appearance and densely congested interior structure. Transmission electron microscopy confirmed that the particle consisted by the cohesion of the primary particles. Magnetic measurements performed in DC field in both zero-field-cooled and field-cooled regimes, as well as AC susceptibility experiments, show that system undergoes spin-glass transition at the freezing temperature T-f = 20 K. The value of the effective magnetic moment mu(eff) = 4.34 mu(B) Obtained from the Curie-Weiss fit in the high temperature region confirms the substitution of Mn3+ ions with Cr3+ ions. (C) 2006 Elsevier Ltd. All rights reserved.",
journal = "Materials Research Bulletin",
title = "Structural and magnetic characterization of LiMn1.825Cr0.175O4 spinel obtained by ultrasonic spray pyrolysis",
volume = "42",
number = "3",
pages = "515-522",
doi = "10.1016/j.materresbull.2006.06.018"
}

Jugović, D., Cvjetićanin, N., Kusigerski, V., Mitrić, M., Miljkovic, M., Makovec, D.,& Uskoković, D.. (2007). Structural and magnetic characterization of LiMn1.825Cr0.175O4 spinel obtained by ultrasonic spray pyrolysis. in Materials Research Bulletin, 42(3), 515-522.
https://doi.org/10.1016/j.materresbull.2006.06.018

Jugović D, Cvjetićanin N, Kusigerski V, Mitrić M, Miljkovic M, Makovec D, Uskoković D. Structural and magnetic characterization of LiMn1.825Cr0.175O4 spinel obtained by ultrasonic spray pyrolysis. in Materials Research Bulletin. 2007;42(3):515-522.
doi:10.1016/j.materresbull.2006.06.018 .

Jugović, Dragana, Cvjetićanin, Nikola, Kusigerski, Vladan, Mitrić, Miodrag, Miljkovic, M., Makovec, Darko, Uskoković, Dragan, "Structural and magnetic characterization of LiMn1.825Cr0.175O4 spinel obtained by ultrasonic spray pyrolysis" in Materials Research Bulletin, 42, no. 3 (2007):515-522,
https://doi.org/10.1016/j.materresbull.2006.06.018 . .