TY  - JOUR
AU  - Labus, Nebojša J.
AU  - Vasiljević, Zorka Z
AU  - Aleksić, Obrad
AU  - Luković, Miloljub
AU  - Marković, Smilja
AU  - Pavlović, Vladimir B
AU  - Mentus, Slavko
AU  - Nikolić, Maria Vesna
PY  - 2017
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1102
AB  - Commercial Mn-Zn powder (Mn0.63Zn0.37Fe2O4, 93 wt. % and Fe2O3 7 wt. %) was milled 0.5, 1, 2 and 4 hours in a planetary ball mill. The goal was to observe intensive milling influences on oxidation and reduction processes that will happen during subsequent heating. Powders were characterized with XRD, SEM and particle seizer. Subsequent heating was monitored on TGA/DTA in an air atmosphere. After compaction of the milled powders, sintering was also performed in a dilatometric device. Sintered specimens were characterized micro structurally with SEM on a fresh breakage. Obtained differential TGA diagrams suggest intensive changes during prolonged milling of the oxidation kinetics on heating. Ferrite powders changed with milling as well as with second run heating were characterized to enable determination of the potentially best ratio of milling and heating to be applied to obtain the desired microstructure.
PB  - Međunarodni Institut za nauku o sinterovanju, Beograd
T2  - Science of Sintering
T1  - Characterisation of Mn0.63Zn0.37Fe2O4 Powders After Intensive Milling and Subsequent Thermal Treatment
EP  - 467
IS  - 4
SP  - 455
VL  - 49
DO  - 10.2298/SOS1704455L
ER  - 

@article{
author = "Labus, Nebojša J. and Vasiljević, Zorka Z and Aleksić, Obrad and Luković, Miloljub and Marković, Smilja and Pavlović, Vladimir B and Mentus, Slavko and Nikolić, Maria Vesna",
year = "2017",
abstract = "Commercial Mn-Zn powder (Mn0.63Zn0.37Fe2O4, 93 wt. % and Fe2O3 7 wt. %) was milled 0.5, 1, 2 and 4 hours in a planetary ball mill. The goal was to observe intensive milling influences on oxidation and reduction processes that will happen during subsequent heating. Powders were characterized with XRD, SEM and particle seizer. Subsequent heating was monitored on TGA/DTA in an air atmosphere. After compaction of the milled powders, sintering was also performed in a dilatometric device. Sintered specimens were characterized micro structurally with SEM on a fresh breakage. Obtained differential TGA diagrams suggest intensive changes during prolonged milling of the oxidation kinetics on heating. Ferrite powders changed with milling as well as with second run heating were characterized to enable determination of the potentially best ratio of milling and heating to be applied to obtain the desired microstructure.",
publisher = "Međunarodni Institut za nauku o sinterovanju, Beograd",
journal = "Science of Sintering",
title = "Characterisation of Mn0.63Zn0.37Fe2O4 Powders After Intensive Milling and Subsequent Thermal Treatment",
pages = "467-455",
number = "4",
volume = "49",
doi = "10.2298/SOS1704455L"
}

Labus, N. J., Vasiljević, Z. Z., Aleksić, O., Luković, M., Marković, S., Pavlović, V. B., Mentus, S.,& Nikolić, M. V.. (2017). Characterisation of Mn0.63Zn0.37Fe2O4 Powders After Intensive Milling and Subsequent Thermal Treatment. in Science of Sintering
Međunarodni Institut za nauku o sinterovanju, Beograd., 49(4), 455-467.
https://doi.org/10.2298/SOS1704455L

Labus NJ, Vasiljević ZZ, Aleksić O, Luković M, Marković S, Pavlović VB, Mentus S, Nikolić MV. Characterisation of Mn0.63Zn0.37Fe2O4 Powders After Intensive Milling and Subsequent Thermal Treatment. in Science of Sintering. 2017;49(4):455-467.
doi:10.2298/SOS1704455L .

Labus, Nebojša J., Vasiljević, Zorka Z, Aleksić, Obrad, Luković, Miloljub, Marković, Smilja, Pavlović, Vladimir B, Mentus, Slavko, Nikolić, Maria Vesna, "Characterisation of Mn0.63Zn0.37Fe2O4 Powders After Intensive Milling and Subsequent Thermal Treatment" in Science of Sintering, 49, no. 4 (2017):455-467,
https://doi.org/10.2298/SOS1704455L . .

TY  - JOUR
AU  - Vujković, Milica
AU  - Nedic, Zoran
AU  - Tancic, Pavle
AU  - Aleksić, Obrad
AU  - Nikolić, Maria Vesna
AU  - Mioc, Ubavka
AU  - Mentus, Slavko
PY  - 2016
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/937
AB  - Monophosphate bronze (PW8O26, WPB) was synthesized by low-temperature (650 A degrees C) heating of 12-tungstophosphoric acid (WPA). Its lithiated derivative with a low lithium content (Li-3-WPB) was synthesized by heating lithium salt of WPA at 650 A degrees C. Its lithiated derivative with a high lithium content was synthesized by mechanochemical lithiation of Li3WPB (Li (n) -WPB) (n > 3), followed by heat treatment at 650 A degrees C. X-ray powder diffraction analysis confirmed that the bronze structure changed with the increase of the incorporated lithium content. These bronzes were investigated from the aspect of lithiation/delithiation kinetics in an aqueous saturated LiNO3 electrolyte solution. By cyclic voltammetry, both the kinetics of intercalation/deintercalation and the coulombic capacity were found to decrease with the increase of initial lithium content, in agreement with literature data for electrochemically lithiated tungstophosphate bronzes. Monoclinic lithium-free bronze PW8O26, as the most promising material, was subjected to a further detailed galvanostatic investigation coupled with the LiFe0.95V0.05PO4/C composite as a cathode material in an aqueous battery. In comparison to its behavior in an organic electrolyte, a considerably lower initial capacity of the bronze electrode was measured. However, its cyclic stability was much better in an aqueous than in an organic electrolyte.
PB  - Springer, New York
T2  - Journal of Materials Science
T1  - Electrochemical lithiation/delithiation kinetics and capacity of phosphate tungsten bronze and its chemically pre-lithiated derivatives in aqueous solutions
EP  - 2489
IS  - 5
SP  - 2481
VL  - 51
DO  - 10.1007/s10853-015-9560-5
ER  - 

@article{
author = "Vujković, Milica and Nedic, Zoran and Tancic, Pavle and Aleksić, Obrad and Nikolić, Maria Vesna and Mioc, Ubavka and Mentus, Slavko",
year = "2016",
abstract = "Monophosphate bronze (PW8O26, WPB) was synthesized by low-temperature (650 A degrees C) heating of 12-tungstophosphoric acid (WPA). Its lithiated derivative with a low lithium content (Li-3-WPB) was synthesized by heating lithium salt of WPA at 650 A degrees C. Its lithiated derivative with a high lithium content was synthesized by mechanochemical lithiation of Li3WPB (Li (n) -WPB) (n > 3), followed by heat treatment at 650 A degrees C. X-ray powder diffraction analysis confirmed that the bronze structure changed with the increase of the incorporated lithium content. These bronzes were investigated from the aspect of lithiation/delithiation kinetics in an aqueous saturated LiNO3 electrolyte solution. By cyclic voltammetry, both the kinetics of intercalation/deintercalation and the coulombic capacity were found to decrease with the increase of initial lithium content, in agreement with literature data for electrochemically lithiated tungstophosphate bronzes. Monoclinic lithium-free bronze PW8O26, as the most promising material, was subjected to a further detailed galvanostatic investigation coupled with the LiFe0.95V0.05PO4/C composite as a cathode material in an aqueous battery. In comparison to its behavior in an organic electrolyte, a considerably lower initial capacity of the bronze electrode was measured. However, its cyclic stability was much better in an aqueous than in an organic electrolyte.",
publisher = "Springer, New York",
journal = "Journal of Materials Science",
title = "Electrochemical lithiation/delithiation kinetics and capacity of phosphate tungsten bronze and its chemically pre-lithiated derivatives in aqueous solutions",
pages = "2489-2481",
number = "5",
volume = "51",
doi = "10.1007/s10853-015-9560-5"
}

Vujković, M., Nedic, Z., Tancic, P., Aleksić, O., Nikolić, M. V., Mioc, U.,& Mentus, S.. (2016). Electrochemical lithiation/delithiation kinetics and capacity of phosphate tungsten bronze and its chemically pre-lithiated derivatives in aqueous solutions. in Journal of Materials Science
Springer, New York., 51(5), 2481-2489.
https://doi.org/10.1007/s10853-015-9560-5

Vujković M, Nedic Z, Tancic P, Aleksić O, Nikolić MV, Mioc U, Mentus S. Electrochemical lithiation/delithiation kinetics and capacity of phosphate tungsten bronze and its chemically pre-lithiated derivatives in aqueous solutions. in Journal of Materials Science. 2016;51(5):2481-2489.
doi:10.1007/s10853-015-9560-5 .

Vujković, Milica, Nedic, Zoran, Tancic, Pavle, Aleksić, Obrad, Nikolić, Maria Vesna, Mioc, Ubavka, Mentus, Slavko, "Electrochemical lithiation/delithiation kinetics and capacity of phosphate tungsten bronze and its chemically pre-lithiated derivatives in aqueous solutions" in Journal of Materials Science, 51, no. 5 (2016):2481-2489,
https://doi.org/10.1007/s10853-015-9560-5 . .

TY  - JOUR
AU  - Stojmenović, M.
AU  - Bošković, Snežana B
AU  - Žunić, Milan
AU  - Babić, Biljana M.
AU  - Matović, Branko
AU  - Bajuk-Bogdanović, Danica
AU  - Mentus, S.
PY  - 2015
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/872
AB  - A series of four different powders ceria doped Ce1-xErxO2-delta (0.05  lt = x  lt = 0.20) were synthesized by applying self-propagating reaction at room temperature (SPRT method). SPRT procedure is based on the self-propagating room temperature reaction between metal nitrates and sodium hydroxide, wherein the reaction is spontaneous and terminates extremely fast. The method is known to assure very precise stoichiometry of the final product in comparison with a tailored composition. XRPD, Raman spectroscopy, TEM and BET measurements were used to characterize the nanopowders at room temperature. It was shown that all obtained powders were single phase solid solutions with a fluorite-type crystal structure and all powder particles have nanometric size (about 3-4 nm). Densification was performed at 1550 degrees C, in an air atmosphere for 2 h. XRPD, SEM and complex impedance method measurements were carried out on sintered samples. Single phase form was evidenced for each sintered materials. The best value of conductivity at 700 degrees C amounted to 1.10 x 10(-2) Omega(-1) cm(-1) for Ce0.85Er0.O-3(2-delta) sample. Corresponding activation energies of conductivity amounted to 0.28 eV in the temperature range 500-700 degrees C.
PB  - Elsevier Science Sa, Lausanne
T2  - Materials Chemistry and Physics
T1  - Studies on structural, morphological and electrical properties of Ce1-xErxO2-delta (x=0.05-0.20) as solid electrolyte for IT - SOFC
EP  - 431
SP  - 422
VL  - 153
DO  - 10.1016/j.matchemphys.2015.01.036
ER  - 

@article{
author = "Stojmenović, M. and Bošković, Snežana B and Žunić, Milan and Babić, Biljana M. and Matović, Branko and Bajuk-Bogdanović, Danica and Mentus, S.",
year = "2015",
abstract = "A series of four different powders ceria doped Ce1-xErxO2-delta (0.05  lt = x  lt = 0.20) were synthesized by applying self-propagating reaction at room temperature (SPRT method). SPRT procedure is based on the self-propagating room temperature reaction between metal nitrates and sodium hydroxide, wherein the reaction is spontaneous and terminates extremely fast. The method is known to assure very precise stoichiometry of the final product in comparison with a tailored composition. XRPD, Raman spectroscopy, TEM and BET measurements were used to characterize the nanopowders at room temperature. It was shown that all obtained powders were single phase solid solutions with a fluorite-type crystal structure and all powder particles have nanometric size (about 3-4 nm). Densification was performed at 1550 degrees C, in an air atmosphere for 2 h. XRPD, SEM and complex impedance method measurements were carried out on sintered samples. Single phase form was evidenced for each sintered materials. The best value of conductivity at 700 degrees C amounted to 1.10 x 10(-2) Omega(-1) cm(-1) for Ce0.85Er0.O-3(2-delta) sample. Corresponding activation energies of conductivity amounted to 0.28 eV in the temperature range 500-700 degrees C.",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Materials Chemistry and Physics",
title = "Studies on structural, morphological and electrical properties of Ce1-xErxO2-delta (x=0.05-0.20) as solid electrolyte for IT - SOFC",
pages = "431-422",
volume = "153",
doi = "10.1016/j.matchemphys.2015.01.036"
}

Stojmenović, M., Bošković, S. B., Žunić, M., Babić, B. M., Matović, B., Bajuk-Bogdanović, D.,& Mentus, S.. (2015). Studies on structural, morphological and electrical properties of Ce1-xErxO2-delta (x=0.05-0.20) as solid electrolyte for IT - SOFC. in Materials Chemistry and Physics
Elsevier Science Sa, Lausanne., 153, 422-431.
https://doi.org/10.1016/j.matchemphys.2015.01.036

Stojmenović M, Bošković SB, Žunić M, Babić BM, Matović B, Bajuk-Bogdanović D, Mentus S. Studies on structural, morphological and electrical properties of Ce1-xErxO2-delta (x=0.05-0.20) as solid electrolyte for IT - SOFC. in Materials Chemistry and Physics. 2015;153:422-431.
doi:10.1016/j.matchemphys.2015.01.036 .

Stojmenović, M., Bošković, Snežana B, Žunić, Milan, Babić, Biljana M., Matović, Branko, Bajuk-Bogdanović, Danica, Mentus, S., "Studies on structural, morphological and electrical properties of Ce1-xErxO2-delta (x=0.05-0.20) as solid electrolyte for IT - SOFC" in Materials Chemistry and Physics, 153 (2015):422-431,
https://doi.org/10.1016/j.matchemphys.2015.01.036 . .

TY  - JOUR
AU  - Labus, Nebojša J.
AU  - Mentus, S.
AU  - Rakic, S.
AU  - Đurić, Zorka Z
AU  - Vujančević, Jelena
AU  - Nikolić, Maria Vesna
PY  - 2015
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/845
AB  - The scope of this work was observing dimensional and heat transfer changes in ZnTiO3 samples during heating in nitrogen and air atmosphere. Interactions of bulk specimens with gaseous surrounding induce microstructure changes during heating. Sintered ZnTiO3 nanopowder samples were submitted to subsequent heating. Dilatation curves and thermogravimetric with simultaneous differential thermal analysis TGA/DTA curves were recorded. Reheating was performed in air and nitrogen atmospheres. Reheated samples obtained at different characteristic temperatures in air were analyzed by X-ray diffraction (XRD). Microstructures obtained by scanning electron microscopy (SEM) of reheated sintered samples are presented and compared. Reheating in a different atmosphere induced different microstructures. The goal was indicating possible causes leading to the microstructure changes.
PB  - Međunarodni Institut za nauku o sinterovanju, Beograd
T2  - Science of Sintering
T1  - Reheating of Zinc-titanate Sintered Specimens
EP  - 81
IS  - 1
SP  - 71
VL  - 47
DO  - 10.2298/SOS1501071L
ER  - 

@article{
author = "Labus, Nebojša J. and Mentus, S. and Rakic, S. and Đurić, Zorka Z and Vujančević, Jelena and Nikolić, Maria Vesna",
year = "2015",
abstract = "The scope of this work was observing dimensional and heat transfer changes in ZnTiO3 samples during heating in nitrogen and air atmosphere. Interactions of bulk specimens with gaseous surrounding induce microstructure changes during heating. Sintered ZnTiO3 nanopowder samples were submitted to subsequent heating. Dilatation curves and thermogravimetric with simultaneous differential thermal analysis TGA/DTA curves were recorded. Reheating was performed in air and nitrogen atmospheres. Reheated samples obtained at different characteristic temperatures in air were analyzed by X-ray diffraction (XRD). Microstructures obtained by scanning electron microscopy (SEM) of reheated sintered samples are presented and compared. Reheating in a different atmosphere induced different microstructures. The goal was indicating possible causes leading to the microstructure changes.",
publisher = "Međunarodni Institut za nauku o sinterovanju, Beograd",
journal = "Science of Sintering",
title = "Reheating of Zinc-titanate Sintered Specimens",
pages = "81-71",
number = "1",
volume = "47",
doi = "10.2298/SOS1501071L"
}

Labus, N. J., Mentus, S., Rakic, S., Đurić, Z. Z., Vujančević, J.,& Nikolić, M. V.. (2015). Reheating of Zinc-titanate Sintered Specimens. in Science of Sintering
Međunarodni Institut za nauku o sinterovanju, Beograd., 47(1), 71-81.
https://doi.org/10.2298/SOS1501071L

Labus NJ, Mentus S, Rakic S, Đurić ZZ, Vujančević J, Nikolić MV. Reheating of Zinc-titanate Sintered Specimens. in Science of Sintering. 2015;47(1):71-81.
doi:10.2298/SOS1501071L .

Labus, Nebojša J., Mentus, S., Rakic, S., Đurić, Zorka Z, Vujančević, Jelena, Nikolić, Maria Vesna, "Reheating of Zinc-titanate Sintered Specimens" in Science of Sintering, 47, no. 1 (2015):71-81,
https://doi.org/10.2298/SOS1501071L . .

TY  - JOUR
AU  - Labus, Nebojša J.
AU  - Mentus, S.
AU  - Đurić, Zorka Z
AU  - Nikolić, Maria Vesna
PY  - 2014
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/748
AB  - The influence of air and nitrogen atmosphere during heating on TiO2 nano and micro sized powders as well as sintered polycrystalline specimens was analyzed. Sintering of TiO2 nano and micro powders in air atmosphere was monitored in a dilatometer. Non compacted nano and micro powders were analyzed separately in air and nitrogen atmospheres during heating using thermo gravimetric (TG) and differential thermal analysis (DTA). The anatase to rutile phase transition temperature interval is influenced by the powder particle size and atmosphere change. At lower temperatures for nano TiO2 powder a second order phase transition was detected by both thermal techniques. Polycrystalline specimens obtained by sintering from nano powders were reheated in the dilatometer in nitrogen and air atmosphere, and their shrinkage is found to be different. Powder particle size influence, as well as the air and nitrogen atmosphere influence was discussed.
PB  - Međunarodni Institut za nauku o sinterovanju, Beograd
T2  - Science of Sintering
T1  - Influence of Nitrogen and Air Atmosphere During Thermal Treatment on Micro and Nano Sized Powders and Sintered TiO2 Specimens
EP  - 375
IS  - 3
SP  - 365
VL  - 46
DO  - 10.2298/SOS1403365L
ER  - 

@article{
author = "Labus, Nebojša J. and Mentus, S. and Đurić, Zorka Z and Nikolić, Maria Vesna",
year = "2014",
abstract = "The influence of air and nitrogen atmosphere during heating on TiO2 nano and micro sized powders as well as sintered polycrystalline specimens was analyzed. Sintering of TiO2 nano and micro powders in air atmosphere was monitored in a dilatometer. Non compacted nano and micro powders were analyzed separately in air and nitrogen atmospheres during heating using thermo gravimetric (TG) and differential thermal analysis (DTA). The anatase to rutile phase transition temperature interval is influenced by the powder particle size and atmosphere change. At lower temperatures for nano TiO2 powder a second order phase transition was detected by both thermal techniques. Polycrystalline specimens obtained by sintering from nano powders were reheated in the dilatometer in nitrogen and air atmosphere, and their shrinkage is found to be different. Powder particle size influence, as well as the air and nitrogen atmosphere influence was discussed.",
publisher = "Međunarodni Institut za nauku o sinterovanju, Beograd",
journal = "Science of Sintering",
title = "Influence of Nitrogen and Air Atmosphere During Thermal Treatment on Micro and Nano Sized Powders and Sintered TiO2 Specimens",
pages = "375-365",
number = "3",
volume = "46",
doi = "10.2298/SOS1403365L"
}

Labus, N. J., Mentus, S., Đurić, Z. Z.,& Nikolić, M. V.. (2014). Influence of Nitrogen and Air Atmosphere During Thermal Treatment on Micro and Nano Sized Powders and Sintered TiO2 Specimens. in Science of Sintering
Međunarodni Institut za nauku o sinterovanju, Beograd., 46(3), 365-375.
https://doi.org/10.2298/SOS1403365L

Labus NJ, Mentus S, Đurić ZZ, Nikolić MV. Influence of Nitrogen and Air Atmosphere During Thermal Treatment on Micro and Nano Sized Powders and Sintered TiO2 Specimens. in Science of Sintering. 2014;46(3):365-375.
doi:10.2298/SOS1403365L .

Labus, Nebojša J., Mentus, S., Đurić, Zorka Z, Nikolić, Maria Vesna, "Influence of Nitrogen and Air Atmosphere During Thermal Treatment on Micro and Nano Sized Powders and Sintered TiO2 Specimens" in Science of Sintering, 46, no. 3 (2014):365-375,
https://doi.org/10.2298/SOS1403365L . .