TY  - JOUR
AU  - Žunić, Milan
AU  - Chevallier, Laure
AU  - Radojković, Aleksandar
AU  - Branković, Goran
AU  - Branković, Zorica
AU  - di Bartolomeo, Elisabetta
PY  - 2011
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/466
AB  - Cermet anode substrates Ni-BaCe0 9Y0 1O3-delta (Ni-BCY10) with varied ratios between Ni and BCY10 were prepared BCY10 powders were prepared by the citrate-nitrate auto-combustion method and anode substrates were prepared by the method of evaporation and decomposition of solutions and suspensions Sintered anode substrates were reduced and their properties were examined before and after reduction as a function of the ratio between Ni and BCY10 Microstructural properties of the pellets were investigated using X-ray diffraction analysis and field emission scanning electron microscopy The influence of the Ni BCY10 ratio on the microstructure of conducting paths through ceramic and metal parts was discussed Impedance spectroscopy measurements were used for evaluation of electrical properties of the anode pellets The high conductivity values of reduced anodes confirmed percolation through Ni particles even for an anode with a reduced amount of nickel Fuel cell tests were carried out in order to examine the influence of the Ni BCY10 ratio on fuel cell performance and to compare characteristics of cermet anodes with platinum electrodes The ratio between Ni and BCY10 did have a slight influence on the power output of fuel cells Fuel cells with a cermet anode demonstrated a higher power output compared to fuel cells with a platinum electrode
PB  - Elsevier Science Sa, Lausanne
T2  - Journal of Alloys and Compounds
T1  - Influence of the ratio between Ni and BaCe0 9Y0 1O3-delta on microstructural and electrical properties of proton conducting Ni-BaCe0 Y-9(0) O-1(3-delta) anodes
EP  - 1162
IS  - 4
SP  - 1157
VL  - 509
DO  - 10.1016/j.jallcom.2010.09.144
ER  - 

@article{
author = "Žunić, Milan and Chevallier, Laure and Radojković, Aleksandar and Branković, Goran and Branković, Zorica and di Bartolomeo, Elisabetta",
year = "2011",
abstract = "Cermet anode substrates Ni-BaCe0 9Y0 1O3-delta (Ni-BCY10) with varied ratios between Ni and BCY10 were prepared BCY10 powders were prepared by the citrate-nitrate auto-combustion method and anode substrates were prepared by the method of evaporation and decomposition of solutions and suspensions Sintered anode substrates were reduced and their properties were examined before and after reduction as a function of the ratio between Ni and BCY10 Microstructural properties of the pellets were investigated using X-ray diffraction analysis and field emission scanning electron microscopy The influence of the Ni BCY10 ratio on the microstructure of conducting paths through ceramic and metal parts was discussed Impedance spectroscopy measurements were used for evaluation of electrical properties of the anode pellets The high conductivity values of reduced anodes confirmed percolation through Ni particles even for an anode with a reduced amount of nickel Fuel cell tests were carried out in order to examine the influence of the Ni BCY10 ratio on fuel cell performance and to compare characteristics of cermet anodes with platinum electrodes The ratio between Ni and BCY10 did have a slight influence on the power output of fuel cells Fuel cells with a cermet anode demonstrated a higher power output compared to fuel cells with a platinum electrode",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Journal of Alloys and Compounds",
title = "Influence of the ratio between Ni and BaCe0 9Y0 1O3-delta on microstructural and electrical properties of proton conducting Ni-BaCe0 Y-9(0) O-1(3-delta) anodes",
pages = "1162-1157",
number = "4",
volume = "509",
doi = "10.1016/j.jallcom.2010.09.144"
}

Žunić, M., Chevallier, L., Radojković, A., Branković, G., Branković, Z.,& di Bartolomeo, E.. (2011). Influence of the ratio between Ni and BaCe0 9Y0 1O3-delta on microstructural and electrical properties of proton conducting Ni-BaCe0 Y-9(0) O-1(3-delta) anodes. in Journal of Alloys and Compounds
Elsevier Science Sa, Lausanne., 509(4), 1157-1162.
https://doi.org/10.1016/j.jallcom.2010.09.144

Žunić M, Chevallier L, Radojković A, Branković G, Branković Z, di Bartolomeo E. Influence of the ratio between Ni and BaCe0 9Y0 1O3-delta on microstructural and electrical properties of proton conducting Ni-BaCe0 Y-9(0) O-1(3-delta) anodes. in Journal of Alloys and Compounds. 2011;509(4):1157-1162.
doi:10.1016/j.jallcom.2010.09.144 .

Žunić, Milan, Chevallier, Laure, Radojković, Aleksandar, Branković, Goran, Branković, Zorica, di Bartolomeo, Elisabetta, "Influence of the ratio between Ni and BaCe0 9Y0 1O3-delta on microstructural and electrical properties of proton conducting Ni-BaCe0 Y-9(0) O-1(3-delta) anodes" in Journal of Alloys and Compounds, 509, no. 4 (2011):1157-1162,
https://doi.org/10.1016/j.jallcom.2010.09.144 . .

TY  - JOUR
AU  - Šćepanović, Maja
AU  - Grujic-Brojcin, Mirjana U
AU  - Vojisavljević, Katarina
AU  - Bernik, Slavko
AU  - Srećković, Tatjana
PY  - 2010
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/389
AB  - Raman scattering spectroscopy has been used for the characterization of zinc oxide nanoparticles obtained by mechanical activation in a high-energy vibro-mill and planetary ball mill. Raman modes observed in spectra of nonactivated sample are assigned to Raman spectra of the ZnO monocrystal, while the spectra of mechanically activated samples point out to the structural and stoichiometric changes, depending on the milling time and the choice of equipment. Observed redshift and peak broadening of the E2(high) and E1 (LO) first-order Raman modes are attributed to increased disorder induced by mechanical milling, followed by the effects of phonon confinement due to correlation length decrease. The additional modes identified in Raman spectra of activated ZnO samples are related to the surface optical phonon modes, due to the intrinsic surface defects and presence of ZrO(2)as extrinsic defects introduced by milling in zirconia vials.
PB  - John Wiley & Sons Ltd, Chichester
T2  - Journal of Raman Spectroscopy
T1  - Raman study of structural disorder in ZnO nanopowders
EP  - 921
IS  - 9
SP  - 914
VL  - 41
DO  - 10.1002/jrs.2546
ER  - 

@article{
author = "Šćepanović, Maja and Grujic-Brojcin, Mirjana U and Vojisavljević, Katarina and Bernik, Slavko and Srećković, Tatjana",
year = "2010",
abstract = "Raman scattering spectroscopy has been used for the characterization of zinc oxide nanoparticles obtained by mechanical activation in a high-energy vibro-mill and planetary ball mill. Raman modes observed in spectra of nonactivated sample are assigned to Raman spectra of the ZnO monocrystal, while the spectra of mechanically activated samples point out to the structural and stoichiometric changes, depending on the milling time and the choice of equipment. Observed redshift and peak broadening of the E2(high) and E1 (LO) first-order Raman modes are attributed to increased disorder induced by mechanical milling, followed by the effects of phonon confinement due to correlation length decrease. The additional modes identified in Raman spectra of activated ZnO samples are related to the surface optical phonon modes, due to the intrinsic surface defects and presence of ZrO(2)as extrinsic defects introduced by milling in zirconia vials.",
publisher = "John Wiley & Sons Ltd, Chichester",
journal = "Journal of Raman Spectroscopy",
title = "Raman study of structural disorder in ZnO nanopowders",
pages = "921-914",
number = "9",
volume = "41",
doi = "10.1002/jrs.2546"
}

Šćepanović, M., Grujic-Brojcin, M. U., Vojisavljević, K., Bernik, S.,& Srećković, T.. (2010). Raman study of structural disorder in ZnO nanopowders. in Journal of Raman Spectroscopy
John Wiley & Sons Ltd, Chichester., 41(9), 914-921.
https://doi.org/10.1002/jrs.2546

Šćepanović M, Grujic-Brojcin MU, Vojisavljević K, Bernik S, Srećković T. Raman study of structural disorder in ZnO nanopowders. in Journal of Raman Spectroscopy. 2010;41(9):914-921.
doi:10.1002/jrs.2546 .

Šćepanović, Maja, Grujic-Brojcin, Mirjana U, Vojisavljević, Katarina, Bernik, Slavko, Srećković, Tatjana, "Raman study of structural disorder in ZnO nanopowders" in Journal of Raman Spectroscopy, 41, no. 9 (2010):914-921,
https://doi.org/10.1002/jrs.2546 . .

TY  - JOUR
AU  - Branković, Zorica
AU  - Djuris, Katarina
AU  - Radojković, Aleksandar
AU  - Bernik, Slavko
AU  - Jaglicic, Zvonko
AU  - Jagodic, M
AU  - Vojisavljević, Katarina
AU  - Branković, Goran
PY  - 2010
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/378
AB  - Substituted lanthanum manganites with the general formula A(1-x) B (x) MnO3 (A = La, B = Ca, SraEuro broken vertical bar) have attracted a lot of attention due to their exceptional electric and magnetic properties. In this work, pure and Ca2+, Sr2+-doped LaMnO3 (LMO) with the concentrations of dopants 30% Ca2+ (LCMO), 30% Sr2+ (LSMO) and 15% Ca2+ + 15% Sr2+ (LCSMO) (in mol. %) were synthesized by polymerizable complex method. Bulk samples were prepared by sintering at 1300 A degrees C for 4 h in oxygen atmosphere. It was found that sintering in oxygen atmosphere enables preparation of single phase ceramics with rhombohedral crystal structure. Chemically prepared fine, submicronic precursor powders provided uniform microstructure and grain size distribution in final ceramics. As a result, pure and doped LMO ceramics with excellent microstructural and magnetic properties were obtained. Depending on the composition, magnetic measurements showed high saturation magnetizations (up to 93 emu/g), with values of the Curie temperature in the range 180-390 K and magnetoresistance up to 67%.
PB  - Springer, Dordrecht
T2  - Journal of Sol-Gel Science and Technology
T1  - Magnetic properties of doped LaMnO3 ceramics obtained by a polymerizable complex method
EP  - 316
IS  - 3
SP  - 311
VL  - 55
DO  - 10.1007/s10971-010-2251-4
ER  - 

@article{
author = "Branković, Zorica and Djuris, Katarina and Radojković, Aleksandar and Bernik, Slavko and Jaglicic, Zvonko and Jagodic, M and Vojisavljević, Katarina and Branković, Goran",
year = "2010",
abstract = "Substituted lanthanum manganites with the general formula A(1-x) B (x) MnO3 (A = La, B = Ca, SraEuro broken vertical bar) have attracted a lot of attention due to their exceptional electric and magnetic properties. In this work, pure and Ca2+, Sr2+-doped LaMnO3 (LMO) with the concentrations of dopants 30% Ca2+ (LCMO), 30% Sr2+ (LSMO) and 15% Ca2+ + 15% Sr2+ (LCSMO) (in mol. %) were synthesized by polymerizable complex method. Bulk samples were prepared by sintering at 1300 A degrees C for 4 h in oxygen atmosphere. It was found that sintering in oxygen atmosphere enables preparation of single phase ceramics with rhombohedral crystal structure. Chemically prepared fine, submicronic precursor powders provided uniform microstructure and grain size distribution in final ceramics. As a result, pure and doped LMO ceramics with excellent microstructural and magnetic properties were obtained. Depending on the composition, magnetic measurements showed high saturation magnetizations (up to 93 emu/g), with values of the Curie temperature in the range 180-390 K and magnetoresistance up to 67%.",
publisher = "Springer, Dordrecht",
journal = "Journal of Sol-Gel Science and Technology",
title = "Magnetic properties of doped LaMnO3 ceramics obtained by a polymerizable complex method",
pages = "316-311",
number = "3",
volume = "55",
doi = "10.1007/s10971-010-2251-4"
}

Branković, Z., Djuris, K., Radojković, A., Bernik, S., Jaglicic, Z., Jagodic, M., Vojisavljević, K.,& Branković, G.. (2010). Magnetic properties of doped LaMnO3 ceramics obtained by a polymerizable complex method. in Journal of Sol-Gel Science and Technology
Springer, Dordrecht., 55(3), 311-316.
https://doi.org/10.1007/s10971-010-2251-4

Branković Z, Djuris K, Radojković A, Bernik S, Jaglicic Z, Jagodic M, Vojisavljević K, Branković G. Magnetic properties of doped LaMnO3 ceramics obtained by a polymerizable complex method. in Journal of Sol-Gel Science and Technology. 2010;55(3):311-316.
doi:10.1007/s10971-010-2251-4 .

Branković, Zorica, Djuris, Katarina, Radojković, Aleksandar, Bernik, Slavko, Jaglicic, Zvonko, Jagodic, M, Vojisavljević, Katarina, Branković, Goran, "Magnetic properties of doped LaMnO3 ceramics obtained by a polymerizable complex method" in Journal of Sol-Gel Science and Technology, 55, no. 3 (2010):311-316,
https://doi.org/10.1007/s10971-010-2251-4 . .

TY  - JOUR
AU  - Matović, Branko
AU  - Dohcević-Mitrović, Zorana
AU  - Radović, M.
AU  - Branković, Zorica
AU  - Branković, Goran
AU  - Bošković, Snežana B
AU  - Popović, Z. V.
PY  - 2009
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/340
AB  - Nanopowdered solid solution Ce(1-x)Fe(x)O(2-delta) samples (0  lt = x  lt = 0.1) were synthesized by a self-propagating room temperature synthesis (SPRT). XRD and Raman spectroscopy at room temperature were used to study the vibrational properties of these materials as well as the Fe solubility in ceria lattice. Results show that all obtained powders are solid solutions with a fluorite-type crystal structure and all powders were nanometric in size. The average size of Ce(1-x)Fe(x)O(2-delta) particles lies about 5 nm. The results of electrical properties of the sintered samples investigated by an ac impedance spectroscopy are also presented and discussed. It was confirmed that Fe(3+) doped ceria material has a potential as electrolyte for intermediate-temperature solid oxide fuel cell applications.
PB  - Elsevier Science Bv, Amsterdam
T2  - Journal of Power Sources
T1  - Synthesis and characterization of ceria based nanometric powders
EP  - 149
IS  - 1
SP  - 146
VL  - 193
DO  - 10.1016/j.jpowsour.2009.03.053
ER  - 

@article{
author = "Matović, Branko and Dohcević-Mitrović, Zorana and Radović, M. and Branković, Zorica and Branković, Goran and Bošković, Snežana B and Popović, Z. V.",
year = "2009",
abstract = "Nanopowdered solid solution Ce(1-x)Fe(x)O(2-delta) samples (0  lt = x  lt = 0.1) were synthesized by a self-propagating room temperature synthesis (SPRT). XRD and Raman spectroscopy at room temperature were used to study the vibrational properties of these materials as well as the Fe solubility in ceria lattice. Results show that all obtained powders are solid solutions with a fluorite-type crystal structure and all powders were nanometric in size. The average size of Ce(1-x)Fe(x)O(2-delta) particles lies about 5 nm. The results of electrical properties of the sintered samples investigated by an ac impedance spectroscopy are also presented and discussed. It was confirmed that Fe(3+) doped ceria material has a potential as electrolyte for intermediate-temperature solid oxide fuel cell applications.",
publisher = "Elsevier Science Bv, Amsterdam",
journal = "Journal of Power Sources",
title = "Synthesis and characterization of ceria based nanometric powders",
pages = "149-146",
number = "1",
volume = "193",
doi = "10.1016/j.jpowsour.2009.03.053"
}

Matović, B., Dohcević-Mitrović, Z., Radović, M., Branković, Z., Branković, G., Bošković, S. B.,& Popović, Z. V.. (2009). Synthesis and characterization of ceria based nanometric powders. in Journal of Power Sources
Elsevier Science Bv, Amsterdam., 193(1), 146-149.
https://doi.org/10.1016/j.jpowsour.2009.03.053

Matović B, Dohcević-Mitrović Z, Radović M, Branković Z, Branković G, Bošković SB, Popović ZV. Synthesis and characterization of ceria based nanometric powders. in Journal of Power Sources. 2009;193(1):146-149.
doi:10.1016/j.jpowsour.2009.03.053 .

Matović, Branko, Dohcević-Mitrović, Zorana, Radović, M., Branković, Zorica, Branković, Goran, Bošković, Snežana B, Popović, Z. V., "Synthesis and characterization of ceria based nanometric powders" in Journal of Power Sources, 193, no. 1 (2009):146-149,
https://doi.org/10.1016/j.jpowsour.2009.03.053 . .

TY  - JOUR
AU  - Srećković, Tatjana
AU  - Bernik, Slavko
AU  - Ceh, M.
AU  - Vojisavljević, Katarina
PY  - 2008
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/301
AB  - In this paper, changes of microstructural characteristics of disperse systems during mechanical activation of zinc oxide (ZnO) have been investigated. ZnO powder was activated by grinding in a planetary ball mill in a continuous regime in air during 300 min at the basic disc rotation speed of 320 rpm and rotation speed of bowls of 400 rpm but with various balls-to-powder mass ratios. During ball milling in a planetary ball mill, initial ZnO powder suffered high-energy impacts. These impacts are very strong, and large amounts of microstructural and structural defects were introduced in the milled powders. The morphology and dispersivity of particles and agglomerates of all powders were investigated by scanning electron microscopy and scanning transmission electron microscopy. The specific surface area of initial ZnO powder was determined as 3.60 m(2) g(-1) and it increased to 4.42 m(2) g(-1) in mechanically activated powders. An increase of the ball-to-powder mass ratio led to a decrease of particle dimensions as well as increased the tendency for joining into quite compact agglomerates, that is aggregates, compared with the very loose, soft initial agglomerates. The obtained results pointed out that activation of ZnO powders produces a highly disperse, nano-scaled mixture of small particles, that is crystallites with sizes in the range of 10-40 nm. Most of these particles are in the form of aggregates with dimensions of 0.3-0.1 mu m. The crystallite and aggregate size strongly depend on milling conditions, that is ball-to-powder mass ratio, as shown in this investigation.
PB  - Wiley, Hoboken
T2  - Journal of Microscopy
T1  - Microstructural characterization of mechanicallyactivated ZnO powders
EP  - 642
IS  - 3
SP  - 639
VL  - 232
DO  - 10.1111/j.1365-2818.2008.02131.x
ER  - 

@article{
author = "Srećković, Tatjana and Bernik, Slavko and Ceh, M. and Vojisavljević, Katarina",
year = "2008",
abstract = "In this paper, changes of microstructural characteristics of disperse systems during mechanical activation of zinc oxide (ZnO) have been investigated. ZnO powder was activated by grinding in a planetary ball mill in a continuous regime in air during 300 min at the basic disc rotation speed of 320 rpm and rotation speed of bowls of 400 rpm but with various balls-to-powder mass ratios. During ball milling in a planetary ball mill, initial ZnO powder suffered high-energy impacts. These impacts are very strong, and large amounts of microstructural and structural defects were introduced in the milled powders. The morphology and dispersivity of particles and agglomerates of all powders were investigated by scanning electron microscopy and scanning transmission electron microscopy. The specific surface area of initial ZnO powder was determined as 3.60 m(2) g(-1) and it increased to 4.42 m(2) g(-1) in mechanically activated powders. An increase of the ball-to-powder mass ratio led to a decrease of particle dimensions as well as increased the tendency for joining into quite compact agglomerates, that is aggregates, compared with the very loose, soft initial agglomerates. The obtained results pointed out that activation of ZnO powders produces a highly disperse, nano-scaled mixture of small particles, that is crystallites with sizes in the range of 10-40 nm. Most of these particles are in the form of aggregates with dimensions of 0.3-0.1 mu m. The crystallite and aggregate size strongly depend on milling conditions, that is ball-to-powder mass ratio, as shown in this investigation.",
publisher = "Wiley, Hoboken",
journal = "Journal of Microscopy",
title = "Microstructural characterization of mechanicallyactivated ZnO powders",
pages = "642-639",
number = "3",
volume = "232",
doi = "10.1111/j.1365-2818.2008.02131.x"
}

Srećković, T., Bernik, S., Ceh, M.,& Vojisavljević, K.. (2008). Microstructural characterization of mechanicallyactivated ZnO powders. in Journal of Microscopy
Wiley, Hoboken., 232(3), 639-642.
https://doi.org/10.1111/j.1365-2818.2008.02131.x

Srećković T, Bernik S, Ceh M, Vojisavljević K. Microstructural characterization of mechanicallyactivated ZnO powders. in Journal of Microscopy. 2008;232(3):639-642.
doi:10.1111/j.1365-2818.2008.02131.x .

Srećković, Tatjana, Bernik, Slavko, Ceh, M., Vojisavljević, Katarina, "Microstructural characterization of mechanicallyactivated ZnO powders" in Journal of Microscopy, 232, no. 3 (2008):639-642,
https://doi.org/10.1111/j.1365-2818.2008.02131.x . .

TY  - JOUR
AU  - Šćepanović, Maja
AU  - Dohcević-Mitrović, Zorana
AU  - Srećković, Tatjana
AU  - Vojisavljević, Katarina
AU  - Popović, Z.V.
PY  - 2007
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/219
AB  - Commercial zinc oxide powder was mechanically treated by grinding in a high-energy vibro-mill in a continual regime in air up to 300 minutes. Original and modified ZnO samples were characterized by Raman, photoluminescence (PL) and infrared (IR) spectroscopy. This study confirms that change in defect structure of ZnO crystal lattice introduced by mechanical activation greatly affects the optical properties of this material.
T2  - AIP Conference Proceedings
T1  - Characterization of mechanically activated ZnO powders by raman, luminescence and IR Spectroscopy
SP  - 648
VL  - 899
DO  - 10.1063/1.2733389
ER  - 

@article{
author = "Šćepanović, Maja and Dohcević-Mitrović, Zorana and Srećković, Tatjana and Vojisavljević, Katarina and Popović, Z.V.",
year = "2007",
abstract = "Commercial zinc oxide powder was mechanically treated by grinding in a high-energy vibro-mill in a continual regime in air up to 300 minutes. Original and modified ZnO samples were characterized by Raman, photoluminescence (PL) and infrared (IR) spectroscopy. This study confirms that change in defect structure of ZnO crystal lattice introduced by mechanical activation greatly affects the optical properties of this material.",
journal = "AIP Conference Proceedings",
title = "Characterization of mechanically activated ZnO powders by raman, luminescence and IR Spectroscopy",
pages = "648",
volume = "899",
doi = "10.1063/1.2733389"
}

Šćepanović, M., Dohcević-Mitrović, Z., Srećković, T., Vojisavljević, K.,& Popović, Z.V.. (2007). Characterization of mechanically activated ZnO powders by raman, luminescence and IR Spectroscopy. in AIP Conference Proceedings, 899, 648.
https://doi.org/10.1063/1.2733389

Šćepanović M, Dohcević-Mitrović Z, Srećković T, Vojisavljević K, Popović Z. Characterization of mechanically activated ZnO powders by raman, luminescence and IR Spectroscopy. in AIP Conference Proceedings. 2007;899:648.
doi:10.1063/1.2733389 .

Šćepanović, Maja, Dohcević-Mitrović, Zorana, Srećković, Tatjana, Vojisavljević, Katarina, Popović, Z.V., "Characterization of mechanically activated ZnO powders by raman, luminescence and IR Spectroscopy" in AIP Conference Proceedings, 899 (2007):648,
https://doi.org/10.1063/1.2733389 . .