TY  - JOUR
AU  - Nikolić, Maria Vesna
AU  - Luković, Miloljub
AU  - Vasiljević, Zorka Z
AU  - Labus, Nebojša J.
AU  - Aleksić, Obrad
PY  - 2018
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1144
AB  - Bulk samples of pseudobrookite with an orthorhombic crystal structure were prepared by sintering a mixture of starting hematite and anatase nano powders in the weight ratio 60:40 at three different sintering temperatures (950, 1050 and 1150 degrees C) resulting in different microstructures determined by SEM analysis. Humidity sensing properties of pseudobrookite were investigated by measuring changes in electrical properties at operating temperatures of 20, 40 and 60 degrees C in the frequency range 100 Hz-100 kHz in the relative humidity range 30-90% in a climatic chamber. At 100 Hz, and 20 degrees C the impedance of pseudobrookite sintered at 1150 degrees C reduced over 5 times in the humidity range 40-90%, and 7 times at 60 degrees C for pseudobrookite sintered at 950 degrees C. Detailed analysis of dielectric properties showed that the dielectric constant increased noticeably with increase in humidity at low frequencies. Electrical conductivity change with frequency followed the Jonscher power law, and increased with increase in relative humidity. The determined frequency constant reduced with increase in sample temperature and increase in relative humidity. The conduction mechanism can be explained using the correlated barrier hopping model. Analysis of complex impedance using an equivalent circuit showed the dominant influence of grain boundaries. Low hysteresis (3.6 and 2.99%) was obtained in the 40-90% humidity range at room temperature (25 degrees C) for pseudobrookite sintered at 950 and 1150 degrees C.
PB  - Springer, Dordrecht
T2  - Journal of Materials Science-Materials in Electronics
T1  - Humidity sensing potential of Fe2TiO5-pseudobrookite
EP  - 9238
IS  - 11
SP  - 9227
VL  - 29
DO  - 10.1007/s10854-018-8951-1
ER  - 

@article{
author = "Nikolić, Maria Vesna and Luković, Miloljub and Vasiljević, Zorka Z and Labus, Nebojša J. and Aleksić, Obrad",
year = "2018",
abstract = "Bulk samples of pseudobrookite with an orthorhombic crystal structure were prepared by sintering a mixture of starting hematite and anatase nano powders in the weight ratio 60:40 at three different sintering temperatures (950, 1050 and 1150 degrees C) resulting in different microstructures determined by SEM analysis. Humidity sensing properties of pseudobrookite were investigated by measuring changes in electrical properties at operating temperatures of 20, 40 and 60 degrees C in the frequency range 100 Hz-100 kHz in the relative humidity range 30-90% in a climatic chamber. At 100 Hz, and 20 degrees C the impedance of pseudobrookite sintered at 1150 degrees C reduced over 5 times in the humidity range 40-90%, and 7 times at 60 degrees C for pseudobrookite sintered at 950 degrees C. Detailed analysis of dielectric properties showed that the dielectric constant increased noticeably with increase in humidity at low frequencies. Electrical conductivity change with frequency followed the Jonscher power law, and increased with increase in relative humidity. The determined frequency constant reduced with increase in sample temperature and increase in relative humidity. The conduction mechanism can be explained using the correlated barrier hopping model. Analysis of complex impedance using an equivalent circuit showed the dominant influence of grain boundaries. Low hysteresis (3.6 and 2.99%) was obtained in the 40-90% humidity range at room temperature (25 degrees C) for pseudobrookite sintered at 950 and 1150 degrees C.",
publisher = "Springer, Dordrecht",
journal = "Journal of Materials Science-Materials in Electronics",
title = "Humidity sensing potential of Fe2TiO5-pseudobrookite",
pages = "9238-9227",
number = "11",
volume = "29",
doi = "10.1007/s10854-018-8951-1"
}

Nikolić, M. V., Luković, M., Vasiljević, Z. Z., Labus, N. J.,& Aleksić, O.. (2018). Humidity sensing potential of Fe2TiO5-pseudobrookite. in Journal of Materials Science-Materials in Electronics
Springer, Dordrecht., 29(11), 9227-9238.
https://doi.org/10.1007/s10854-018-8951-1

Nikolić MV, Luković M, Vasiljević ZZ, Labus NJ, Aleksić O. Humidity sensing potential of Fe2TiO5-pseudobrookite. in Journal of Materials Science-Materials in Electronics. 2018;29(11):9227-9238.
doi:10.1007/s10854-018-8951-1 .

Nikolić, Maria Vesna, Luković, Miloljub, Vasiljević, Zorka Z, Labus, Nebojša J., Aleksić, Obrad, "Humidity sensing potential of Fe2TiO5-pseudobrookite" in Journal of Materials Science-Materials in Electronics, 29, no. 11 (2018):9227-9238,
https://doi.org/10.1007/s10854-018-8951-1 . .

TY  - JOUR
AU  - Aleksić, Stanko O.
AU  - Mitrović, Nebojša S.
AU  - Luković, Miloljub
AU  - Veljović-Jovanović, Sonja
AU  - Luković, Snežana
AU  - Nikolić, Maria Vesna
AU  - Aleksić, Obrad
PY  - 2018
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1168
AB  - A new ground temperature profile sensor comprising of a row of thermistors enables a large number of equidistantly arranged measuring points. The row of thermistors was formed using a group of negative temperature coefficient thick film segmented thermistors connected in series. After that calibration of the DC thermistor resistance R was performed at room temperature and the sensor was placed in a hole drilled on the lawn. DC resistances R of the row of thermistors were measured versus depth z as a parameter and converted to actual temperature T(z) in the ground using the Steinhart-Hart equation. The temperature profile of the ground depending on deepness z and time t as a function T(t, z) was measured on different days during one year in the early morning and in the afternoon. The temperature at the ground surface was compared with the temperature of the deepest sensor point in the ground. Thermal diffusivity D of the ground was determined using measured data T(t, z) in the periods of steady ground temperatures. The new ground temperature profile sensor was realized to investigate the correlation between air and ground temperature, observation of ground temperature profile changes and heat exchange (heat transfer, diffusion, gradient, and heat flow direction) through the ground top layer and finally humidity estimation versus deepness.
PB  - IEEE-Inst Electrical Electronics Engineers Inc, Piscataway
T2  - IEEE Sensors Journal
T1  - A Ground Temperature Profile Sensor Based on NTC Thick Film Segmented Thermistors: Main Properties and Applications
EP  - 4421
IS  - 11
SP  - 4414
VL  - 18
DO  - 10.1109/JSEN.2018.2820123
ER  - 

@article{
author = "Aleksić, Stanko O. and Mitrović, Nebojša S. and Luković, Miloljub and Veljović-Jovanović, Sonja and Luković, Snežana and Nikolić, Maria Vesna and Aleksić, Obrad",
year = "2018",
abstract = "A new ground temperature profile sensor comprising of a row of thermistors enables a large number of equidistantly arranged measuring points. The row of thermistors was formed using a group of negative temperature coefficient thick film segmented thermistors connected in series. After that calibration of the DC thermistor resistance R was performed at room temperature and the sensor was placed in a hole drilled on the lawn. DC resistances R of the row of thermistors were measured versus depth z as a parameter and converted to actual temperature T(z) in the ground using the Steinhart-Hart equation. The temperature profile of the ground depending on deepness z and time t as a function T(t, z) was measured on different days during one year in the early morning and in the afternoon. The temperature at the ground surface was compared with the temperature of the deepest sensor point in the ground. Thermal diffusivity D of the ground was determined using measured data T(t, z) in the periods of steady ground temperatures. The new ground temperature profile sensor was realized to investigate the correlation between air and ground temperature, observation of ground temperature profile changes and heat exchange (heat transfer, diffusion, gradient, and heat flow direction) through the ground top layer and finally humidity estimation versus deepness.",
publisher = "IEEE-Inst Electrical Electronics Engineers Inc, Piscataway",
journal = "IEEE Sensors Journal",
title = "A Ground Temperature Profile Sensor Based on NTC Thick Film Segmented Thermistors: Main Properties and Applications",
pages = "4421-4414",
number = "11",
volume = "18",
doi = "10.1109/JSEN.2018.2820123"
}

Aleksić, S. O., Mitrović, N. S., Luković, M., Veljović-Jovanović, S., Luković, S., Nikolić, M. V.,& Aleksić, O.. (2018). A Ground Temperature Profile Sensor Based on NTC Thick Film Segmented Thermistors: Main Properties and Applications. in IEEE Sensors Journal
IEEE-Inst Electrical Electronics Engineers Inc, Piscataway., 18(11), 4414-4421.
https://doi.org/10.1109/JSEN.2018.2820123

Aleksić SO, Mitrović NS, Luković M, Veljović-Jovanović S, Luković S, Nikolić MV, Aleksić O. A Ground Temperature Profile Sensor Based on NTC Thick Film Segmented Thermistors: Main Properties and Applications. in IEEE Sensors Journal. 2018;18(11):4414-4421.
doi:10.1109/JSEN.2018.2820123 .

Aleksić, Stanko O., Mitrović, Nebojša S., Luković, Miloljub, Veljović-Jovanović, Sonja, Luković, Snežana, Nikolić, Maria Vesna, Aleksić, Obrad, "A Ground Temperature Profile Sensor Based on NTC Thick Film Segmented Thermistors: Main Properties and Applications" in IEEE Sensors Journal, 18, no. 11 (2018):4414-4421,
https://doi.org/10.1109/JSEN.2018.2820123 . .

TY  - JOUR
AU  - Petrović, Dragana
AU  - Lazic, Miroslav
AU  - Aleksić, Obrad
AU  - Nikolić, Maria Vesna
AU  - Ibrahimović, Vedran
AU  - Pajnic, Milan
PY  - 2018
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1145
AB  - Ferrite cores 50 mm long were formed from large ferrite tubes obtained using fine Mn-Zn ferrite powder (M-30-IHIS) extruded and sintered at 1280 degrees C for 2 h. Core impedance was measured in the HF range (0.1-100 MHz), varying the number of coil turns and DC bias. Characteristic parameters such as maximum of impedance Z(m), frequency of maximum impedance F-m, and suppressing range f around F-m were determined for each configuration. The analyzed ferrite cores were tested as round cable suppressors in the impulse regime. Impulses were generated by MOSFET transistor switching of high currents (1-10 A). The number of turns, impulse current, and DC bias current were varied in the range from 0 to 10 A. Magnetic interference configurations were formed on the ferrite core using opposite wound coils and tested in the impulse regime. Suppressor responses to different impulses were mutually compared and analyzed. Finally, two ferrite cores were EM coupled by a short circuited coil to form a novel line EMI suppressor aimed for suppression of power switching noise. Several configurations were formed with coupled cores acting on a magnetically interfering principle with opposite coils. The realized configurations were analyzed in view of application for EMI suppression in an uninterruptible power supply and AC/DC and DC/DC converters.
PB  - Tubitak Scientific & Technical Research Council Turkey, Ankara
T2  - Turkish Journal of Electrical Engineering and Computer Sciences
T1  - Mn-Zn ferrite line EMI suppressor for power switching noise in the impulse/high current bias regime
EP  - 2436
IS  - 5
SP  - 2426
VL  - 26
DO  - 10.3906/elk-1710-52
ER  - 

@article{
author = "Petrović, Dragana and Lazic, Miroslav and Aleksić, Obrad and Nikolić, Maria Vesna and Ibrahimović, Vedran and Pajnic, Milan",
year = "2018",
abstract = "Ferrite cores 50 mm long were formed from large ferrite tubes obtained using fine Mn-Zn ferrite powder (M-30-IHIS) extruded and sintered at 1280 degrees C for 2 h. Core impedance was measured in the HF range (0.1-100 MHz), varying the number of coil turns and DC bias. Characteristic parameters such as maximum of impedance Z(m), frequency of maximum impedance F-m, and suppressing range f around F-m were determined for each configuration. The analyzed ferrite cores were tested as round cable suppressors in the impulse regime. Impulses were generated by MOSFET transistor switching of high currents (1-10 A). The number of turns, impulse current, and DC bias current were varied in the range from 0 to 10 A. Magnetic interference configurations were formed on the ferrite core using opposite wound coils and tested in the impulse regime. Suppressor responses to different impulses were mutually compared and analyzed. Finally, two ferrite cores were EM coupled by a short circuited coil to form a novel line EMI suppressor aimed for suppression of power switching noise. Several configurations were formed with coupled cores acting on a magnetically interfering principle with opposite coils. The realized configurations were analyzed in view of application for EMI suppression in an uninterruptible power supply and AC/DC and DC/DC converters.",
publisher = "Tubitak Scientific & Technical Research Council Turkey, Ankara",
journal = "Turkish Journal of Electrical Engineering and Computer Sciences",
title = "Mn-Zn ferrite line EMI suppressor for power switching noise in the impulse/high current bias regime",
pages = "2436-2426",
number = "5",
volume = "26",
doi = "10.3906/elk-1710-52"
}

Petrović, D., Lazic, M., Aleksić, O., Nikolić, M. V., Ibrahimović, V.,& Pajnic, M.. (2018). Mn-Zn ferrite line EMI suppressor for power switching noise in the impulse/high current bias regime. in Turkish Journal of Electrical Engineering and Computer Sciences
Tubitak Scientific & Technical Research Council Turkey, Ankara., 26(5), 2426-2436.
https://doi.org/10.3906/elk-1710-52

Petrović D, Lazic M, Aleksić O, Nikolić MV, Ibrahimović V, Pajnic M. Mn-Zn ferrite line EMI suppressor for power switching noise in the impulse/high current bias regime. in Turkish Journal of Electrical Engineering and Computer Sciences. 2018;26(5):2426-2436.
doi:10.3906/elk-1710-52 .

Petrović, Dragana, Lazic, Miroslav, Aleksić, Obrad, Nikolić, Maria Vesna, Ibrahimović, Vedran, Pajnic, Milan, "Mn-Zn ferrite line EMI suppressor for power switching noise in the impulse/high current bias regime" in Turkish Journal of Electrical Engineering and Computer Sciences, 26, no. 5 (2018):2426-2436,
https://doi.org/10.3906/elk-1710-52 . .

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  - Aleksić, Obrad
AU  - Vasiljević, Zorka Z
AU  - Vujković, Milica
AU  - Nikolic, Marko
AU  - Labus, Nebojša J.
AU  - Luković, Miloljub
AU  - Nikolić, Maria Vesna
PY  - 2017
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1098
AB  - Nanostructured Fe2TiO5 thick films were deposited on fluorine-doped tin oxide glass substrate using screen printing technology. Starting hematite and anatase nanopowders were mixed in molar ratios 1:1 and 1:1.5 and calcined in air at 900A degrees C for 2 h to form pseudobrookite, Fe2TiO5. Functional powders and sintered thick films were analyzed by X-ray diffraction, scanning electron microscopy, energy-dispersive spectroscopy and transmission electron microscopy. UV-Vis analysis enabled determination of the band gap. Separation and transfer efficiency of photogenerated charge carriers was confirmed by the photoluminescence and electrochemical impedance spectra. Even though a slightly high onset oxygen evolution potential of photoexcited film electrode samples in NaOH was obtained, photocurrent densities were high, especially in the presence of H2O2 (similar to 12 mA cm(-2) at 1.7 V RHE). This work shows promise for practical application due to favorable band positions of pseudobrookite and low-cost screen printing technology.
PB  - Springer, New York
T2  - Journal of Materials Science
T1  - Structural and electronic properties of screen-printed Fe2O3/TiO2 thick films and their photoelectrochemical behavior
EP  - 5953
IS  - 10
SP  - 5938
VL  - 52
DO  - 10.1007/s10853-017-0830-2
ER  - 

@article{
author = "Aleksić, Obrad and Vasiljević, Zorka Z and Vujković, Milica and Nikolic, Marko and Labus, Nebojša J. and Luković, Miloljub and Nikolić, Maria Vesna",
year = "2017",
abstract = "Nanostructured Fe2TiO5 thick films were deposited on fluorine-doped tin oxide glass substrate using screen printing technology. Starting hematite and anatase nanopowders were mixed in molar ratios 1:1 and 1:1.5 and calcined in air at 900A degrees C for 2 h to form pseudobrookite, Fe2TiO5. Functional powders and sintered thick films were analyzed by X-ray diffraction, scanning electron microscopy, energy-dispersive spectroscopy and transmission electron microscopy. UV-Vis analysis enabled determination of the band gap. Separation and transfer efficiency of photogenerated charge carriers was confirmed by the photoluminescence and electrochemical impedance spectra. Even though a slightly high onset oxygen evolution potential of photoexcited film electrode samples in NaOH was obtained, photocurrent densities were high, especially in the presence of H2O2 (similar to 12 mA cm(-2) at 1.7 V RHE). This work shows promise for practical application due to favorable band positions of pseudobrookite and low-cost screen printing technology.",
publisher = "Springer, New York",
journal = "Journal of Materials Science",
title = "Structural and electronic properties of screen-printed Fe2O3/TiO2 thick films and their photoelectrochemical behavior",
pages = "5953-5938",
number = "10",
volume = "52",
doi = "10.1007/s10853-017-0830-2"
}

Aleksić, O., Vasiljević, Z. Z., Vujković, M., Nikolic, M., Labus, N. J., Luković, M.,& Nikolić, M. V.. (2017). Structural and electronic properties of screen-printed Fe2O3/TiO2 thick films and their photoelectrochemical behavior. in Journal of Materials Science
Springer, New York., 52(10), 5938-5953.
https://doi.org/10.1007/s10853-017-0830-2

Aleksić O, Vasiljević ZZ, Vujković M, Nikolic M, Labus NJ, Luković M, Nikolić MV. Structural and electronic properties of screen-printed Fe2O3/TiO2 thick films and their photoelectrochemical behavior. in Journal of Materials Science. 2017;52(10):5938-5953.
doi:10.1007/s10853-017-0830-2 .

Aleksić, Obrad, Vasiljević, Zorka Z, Vujković, Milica, Nikolic, Marko, Labus, Nebojša J., Luković, Miloljub, Nikolić, Maria Vesna, "Structural and electronic properties of screen-printed Fe2O3/TiO2 thick films and their photoelectrochemical behavior" in Journal of Materials Science, 52, no. 10 (2017):5938-5953,
https://doi.org/10.1007/s10853-017-0830-2 . .

TY  - JOUR
AU  - Nikolić, Maria Vesna
AU  - Sekulic, Dalibor L
AU  - Vasiljević, Zorka Z
AU  - Luković, Miloljub
AU  - Pavlović, Vladimir B
AU  - Aleksić, Obrad
PY  - 2017
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1097
AB  - In this work we have investigated changes in dielectric properties, electrical conductivity and complex impedance of Fe2TiO5 nanopowder compacts and bulk samples as a function of elevated temperature (room to 423 K compacts, to 443 K bulk samples), frequency (100 Hz-1 MHz) and composition (starting molar ratio of Fe2O3 and TiO2 1:1-PSB11 and 1:1.5-PSB115). XRD, SEM and TEM analysis of PSB11 and PSB115 powders obtained by a simple solid state process from starting hematite and anatase nanopowders confirmed the formation of nanostructured orthorhombic pseudobrookite with small amounts of excess hematite and rutile. The dielectric constant decreased with frequency and temperature for both compacts and bulk samples. Higher values were determined for bulk samples also reflecting the influence of sample composition. Change in the dielectric loss also reflected the influence of sample composition showing one maximum at high frequencies for compacts, and two maxima at room temperature for bulk samples. Complex impedance was analyzed using equivalent circuits and showed in the case of compacts the influence of both grain and grain boundary components, while in the case of bulk samples the dominant influence of grain boundaries. The temperature dependence of the determined grain and grain boundary resistance for compacts and grain boundary resistance for bulk samples was analyzed using the adiabatic small polaron hopping model enabling determination of activation energies for conduction, while the temperature dependence of relaxation times enabled determination of activation energies for relaxation. Changes in electrical conductivity for compacts and bulk samples followed Jonscher's power law. The change of the determined frequency constant with temperature showed that at elevated temperatures the quantum mechanical-tunneling model for the case of small polaron hopping explains the conduction mechanism occurring in both compacts and bulk samples.
PB  - Springer, Dordrecht
T2  - Journal of Materials Science-Materials in Electronics
T1  - Dielectric properties, complex impedance and electrical conductivity of Fe2TiO5 nanopowder compacts and bulk samples at elevated temperatures
EP  - 4806
IS  - 6
SP  - 4796
VL  - 28
DO  - 10.1007/s10854-016-6125-6
ER  - 

@article{
author = "Nikolić, Maria Vesna and Sekulic, Dalibor L and Vasiljević, Zorka Z and Luković, Miloljub and Pavlović, Vladimir B and Aleksić, Obrad",
year = "2017",
abstract = "In this work we have investigated changes in dielectric properties, electrical conductivity and complex impedance of Fe2TiO5 nanopowder compacts and bulk samples as a function of elevated temperature (room to 423 K compacts, to 443 K bulk samples), frequency (100 Hz-1 MHz) and composition (starting molar ratio of Fe2O3 and TiO2 1:1-PSB11 and 1:1.5-PSB115). XRD, SEM and TEM analysis of PSB11 and PSB115 powders obtained by a simple solid state process from starting hematite and anatase nanopowders confirmed the formation of nanostructured orthorhombic pseudobrookite with small amounts of excess hematite and rutile. The dielectric constant decreased with frequency and temperature for both compacts and bulk samples. Higher values were determined for bulk samples also reflecting the influence of sample composition. Change in the dielectric loss also reflected the influence of sample composition showing one maximum at high frequencies for compacts, and two maxima at room temperature for bulk samples. Complex impedance was analyzed using equivalent circuits and showed in the case of compacts the influence of both grain and grain boundary components, while in the case of bulk samples the dominant influence of grain boundaries. The temperature dependence of the determined grain and grain boundary resistance for compacts and grain boundary resistance for bulk samples was analyzed using the adiabatic small polaron hopping model enabling determination of activation energies for conduction, while the temperature dependence of relaxation times enabled determination of activation energies for relaxation. Changes in electrical conductivity for compacts and bulk samples followed Jonscher's power law. The change of the determined frequency constant with temperature showed that at elevated temperatures the quantum mechanical-tunneling model for the case of small polaron hopping explains the conduction mechanism occurring in both compacts and bulk samples.",
publisher = "Springer, Dordrecht",
journal = "Journal of Materials Science-Materials in Electronics",
title = "Dielectric properties, complex impedance and electrical conductivity of Fe2TiO5 nanopowder compacts and bulk samples at elevated temperatures",
pages = "4806-4796",
number = "6",
volume = "28",
doi = "10.1007/s10854-016-6125-6"
}

Nikolić, M. V., Sekulic, D. L., Vasiljević, Z. Z., Luković, M., Pavlović, V. B.,& Aleksić, O.. (2017). Dielectric properties, complex impedance and electrical conductivity of Fe2TiO5 nanopowder compacts and bulk samples at elevated temperatures. in Journal of Materials Science-Materials in Electronics
Springer, Dordrecht., 28(6), 4796-4806.
https://doi.org/10.1007/s10854-016-6125-6

Nikolić MV, Sekulic DL, Vasiljević ZZ, Luković M, Pavlović VB, Aleksić O. Dielectric properties, complex impedance and electrical conductivity of Fe2TiO5 nanopowder compacts and bulk samples at elevated temperatures. in Journal of Materials Science-Materials in Electronics. 2017;28(6):4796-4806.
doi:10.1007/s10854-016-6125-6 .

Nikolić, Maria Vesna, Sekulic, Dalibor L, Vasiljević, Zorka Z, Luković, Miloljub, Pavlović, Vladimir B, Aleksić, Obrad, "Dielectric properties, complex impedance and electrical conductivity of Fe2TiO5 nanopowder compacts and bulk samples at elevated temperatures" in Journal of Materials Science-Materials in Electronics, 28, no. 6 (2017):4796-4806,
https://doi.org/10.1007/s10854-016-6125-6 . .

TY  - CONF
AU  - Luković, Miloljub
AU  - Nikolić, Maria Vesna
AU  - Vasiljević, Zorka Z
AU  - Blaz, Nelu V.
AU  - Luković, Snežana
AU  - Aleksić, Obrad
PY  - 2017
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1073
AB  - We have investigated the impedance response of pseudobrookite thick films screen printed on alumina substrate in the temperature interval from room temperature to 350 degrees C in the frequency range 100 Hz - 1 MHz. Two thick film pastes were made containing starting hematite and anatase nanopowders (in the 1:1 and 1:1.33 molar ratio - containing excess anatase), glass fritt and organic vehicle. A sandwich PdAg electrode structure was obtained by first printing a PdAg electrode, followed by 3 layers of PSB paste and a PdAg electrode on top with a mesh structure. Each layer was sintered at 850 degrees C in a hybrid conveyor furnace. XRD analysis confirmed the formation of pseudobrookite with an orthorhombic crystal structure. SEM analysis of thick film surfaces and cross sections showed the formation of a porous structure with rod-shaped grains. The impedance response of pseudobrookite thick films, showed a decrease with the rise in sample temperature. It was analyzed using an equivalent circuit reflecting the dominant influence of grain boundaries.
PB  - IEEE Computer Society
C3  - Proceedings of the International Spring Seminar on Electronics Technology
T1  - Impedance Response of Pseudobrookite Thick Films with a Sandwich Configuration
DO  - 10.1109/ISSE.2017.8000886
ER  - 

@conference{
author = "Luković, Miloljub and Nikolić, Maria Vesna and Vasiljević, Zorka Z and Blaz, Nelu V. and Luković, Snežana and Aleksić, Obrad",
year = "2017",
abstract = "We have investigated the impedance response of pseudobrookite thick films screen printed on alumina substrate in the temperature interval from room temperature to 350 degrees C in the frequency range 100 Hz - 1 MHz. Two thick film pastes were made containing starting hematite and anatase nanopowders (in the 1:1 and 1:1.33 molar ratio - containing excess anatase), glass fritt and organic vehicle. A sandwich PdAg electrode structure was obtained by first printing a PdAg electrode, followed by 3 layers of PSB paste and a PdAg electrode on top with a mesh structure. Each layer was sintered at 850 degrees C in a hybrid conveyor furnace. XRD analysis confirmed the formation of pseudobrookite with an orthorhombic crystal structure. SEM analysis of thick film surfaces and cross sections showed the formation of a porous structure with rod-shaped grains. The impedance response of pseudobrookite thick films, showed a decrease with the rise in sample temperature. It was analyzed using an equivalent circuit reflecting the dominant influence of grain boundaries.",
publisher = "IEEE Computer Society",
journal = "Proceedings of the International Spring Seminar on Electronics Technology",
title = "Impedance Response of Pseudobrookite Thick Films with a Sandwich Configuration",
doi = "10.1109/ISSE.2017.8000886"
}

Luković, M., Nikolić, M. V., Vasiljević, Z. Z., Blaz, N. V., Luković, S.,& Aleksić, O.. (2017). Impedance Response of Pseudobrookite Thick Films with a Sandwich Configuration. in Proceedings of the International Spring Seminar on Electronics Technology
IEEE Computer Society..
https://doi.org/10.1109/ISSE.2017.8000886

Luković M, Nikolić MV, Vasiljević ZZ, Blaz NV, Luković S, Aleksić O. Impedance Response of Pseudobrookite Thick Films with a Sandwich Configuration. in Proceedings of the International Spring Seminar on Electronics Technology. 2017;.
doi:10.1109/ISSE.2017.8000886 .

Luković, Miloljub, Nikolić, Maria Vesna, Vasiljević, Zorka Z, Blaz, Nelu V., Luković, Snežana, Aleksić, Obrad, "Impedance Response of Pseudobrookite Thick Films with a Sandwich Configuration" in Proceedings of the International Spring Seminar on Electronics Technology (2017),
https://doi.org/10.1109/ISSE.2017.8000886 . .

TY  - CONF
AU  - Misković, G.
AU  - Nikolić, Maria Vesna
AU  - Luković, Miloljub
AU  - Vasiljević, Zorka Z
AU  - Nicolics, Johann
AU  - Aleksić, Obrad
PY  - 2017
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1068
AB  - Pseudobrookite thick films were obtained by screen printing paste composed of a 1: 1.5 molar ratio mixture of starting nanopowders of hematite and anatase, glass frit and organic binder. The films were deposited on alumina substrates with interdigitated electrode geometry. Sintering at 850 degrees C resulted in the formation of pseudobrookite. X-Ray Diffraction (XRD) analysis showed pseudobrookite with a mixed orthorhombic and monoclinic structure and a small amount of excess rutile. Gas sensing measurements with low NO gas concentrations in air were performed using an in-house gas sensor testing setup in the temperature range 100300 degrees C. On the example of one particular gas concentration, results showed that pseudobrookite exhibited a distinct response to NO already at 150 degrees C that further improved with increased sample temperature.
PB  - IEEE Computer Society
C3  - Proceedings of the International Spring Seminar on Electronics Technology
T1  - Pseudobrookite thick films for potential application as low-temperature sensitive material in NO gas sensors
DO  - 10.1109/ISSE.2017.8000881
ER  - 

@conference{
author = "Misković, G. and Nikolić, Maria Vesna and Luković, Miloljub and Vasiljević, Zorka Z and Nicolics, Johann and Aleksić, Obrad",
year = "2017",
abstract = "Pseudobrookite thick films were obtained by screen printing paste composed of a 1: 1.5 molar ratio mixture of starting nanopowders of hematite and anatase, glass frit and organic binder. The films were deposited on alumina substrates with interdigitated electrode geometry. Sintering at 850 degrees C resulted in the formation of pseudobrookite. X-Ray Diffraction (XRD) analysis showed pseudobrookite with a mixed orthorhombic and monoclinic structure and a small amount of excess rutile. Gas sensing measurements with low NO gas concentrations in air were performed using an in-house gas sensor testing setup in the temperature range 100300 degrees C. On the example of one particular gas concentration, results showed that pseudobrookite exhibited a distinct response to NO already at 150 degrees C that further improved with increased sample temperature.",
publisher = "IEEE Computer Society",
journal = "Proceedings of the International Spring Seminar on Electronics Technology",
title = "Pseudobrookite thick films for potential application as low-temperature sensitive material in NO gas sensors",
doi = "10.1109/ISSE.2017.8000881"
}

Misković, G., Nikolić, M. V., Luković, M., Vasiljević, Z. Z., Nicolics, J.,& Aleksić, O.. (2017). Pseudobrookite thick films for potential application as low-temperature sensitive material in NO gas sensors. in Proceedings of the International Spring Seminar on Electronics Technology
IEEE Computer Society..
https://doi.org/10.1109/ISSE.2017.8000881

Misković G, Nikolić MV, Luković M, Vasiljević ZZ, Nicolics J, Aleksić O. Pseudobrookite thick films for potential application as low-temperature sensitive material in NO gas sensors. in Proceedings of the International Spring Seminar on Electronics Technology. 2017;.
doi:10.1109/ISSE.2017.8000881 .

Misković, G., Nikolić, Maria Vesna, Luković, Miloljub, Vasiljević, Zorka Z, Nicolics, Johann, Aleksić, Obrad, "Pseudobrookite thick films for potential application as low-temperature sensitive material in NO gas sensors" in Proceedings of the International Spring Seminar on Electronics Technology (2017),
https://doi.org/10.1109/ISSE.2017.8000881 . .

TY  - JOUR
AU  - Milutinov, Miodrag M.
AU  - Nikolić, Maria Vesna
AU  - Luković, Snežana
AU  - Blaz, Nelu V.
AU  - Labus, Nebojša J.
AU  - Aleksić, Obrad
AU  - Živanov, Ljiljana D
PY  - 2017
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1088
AB  - In this paper, the influence of additional sieving and milling of starting industrial Mn-Zn powders on magnetic properties was investigated. The starting powder was milled for 60 minutes, followed by sieving through 325 and 400 meshes. The starting and milled powders were used to fabricate toroid shaped samples sintered at 1200 degrees C for 2 hours. Structural parameters of the fabricated samples were analysed by X-ray diffraction and scanning electron microscopy. Complex permeability, core loss density, and hysteresis were measured using the modified watt-meter method. The complex permeability and hysteresis loop were modelled with a new model proposed in the paper. The core loss density was modelled with the Steinmetz empirical equation. The experimental results and calculations show the significance of the additional milling and sieving process on magnetic properties of Mn-Zn ferrite in the frequency range 0.1-10MHz. These processes increase the relative permeability about 3 times and decrease the core loss 4 times by milling of the starting powder.
PB  - Univerzitet u Novom Sadu - Tehnološki fakultet, Novi Sad
T2  - Processing and Application of Ceramics
T1  - Influence of starting powder milling on magnetic properties of Mn-Zn ferrite
EP  - 169
IS  - 2
SP  - 160
VL  - 11
DO  - 10.2298/PAC1702160M
ER  - 

@article{
author = "Milutinov, Miodrag M. and Nikolić, Maria Vesna and Luković, Snežana and Blaz, Nelu V. and Labus, Nebojša J. and Aleksić, Obrad and Živanov, Ljiljana D",
year = "2017",
abstract = "In this paper, the influence of additional sieving and milling of starting industrial Mn-Zn powders on magnetic properties was investigated. The starting powder was milled for 60 minutes, followed by sieving through 325 and 400 meshes. The starting and milled powders were used to fabricate toroid shaped samples sintered at 1200 degrees C for 2 hours. Structural parameters of the fabricated samples were analysed by X-ray diffraction and scanning electron microscopy. Complex permeability, core loss density, and hysteresis were measured using the modified watt-meter method. The complex permeability and hysteresis loop were modelled with a new model proposed in the paper. The core loss density was modelled with the Steinmetz empirical equation. The experimental results and calculations show the significance of the additional milling and sieving process on magnetic properties of Mn-Zn ferrite in the frequency range 0.1-10MHz. These processes increase the relative permeability about 3 times and decrease the core loss 4 times by milling of the starting powder.",
publisher = "Univerzitet u Novom Sadu - Tehnološki fakultet, Novi Sad",
journal = "Processing and Application of Ceramics",
title = "Influence of starting powder milling on magnetic properties of Mn-Zn ferrite",
pages = "169-160",
number = "2",
volume = "11",
doi = "10.2298/PAC1702160M"
}

Milutinov, M. M., Nikolić, M. V., Luković, S., Blaz, N. V., Labus, N. J., Aleksić, O.,& Živanov, L. D.. (2017). Influence of starting powder milling on magnetic properties of Mn-Zn ferrite. in Processing and Application of Ceramics
Univerzitet u Novom Sadu - Tehnološki fakultet, Novi Sad., 11(2), 160-169.
https://doi.org/10.2298/PAC1702160M

Milutinov MM, Nikolić MV, Luković S, Blaz NV, Labus NJ, Aleksić O, Živanov LD. Influence of starting powder milling on magnetic properties of Mn-Zn ferrite. in Processing and Application of Ceramics. 2017;11(2):160-169.
doi:10.2298/PAC1702160M .

Milutinov, Miodrag M., Nikolić, Maria Vesna, Luković, Snežana, Blaz, Nelu V., Labus, Nebojša J., Aleksić, Obrad, Živanov, Ljiljana D, "Influence of starting powder milling on magnetic properties of Mn-Zn ferrite" in Processing and Application of Ceramics, 11, no. 2 (2017):160-169,
https://doi.org/10.2298/PAC1702160M . .

TY  - CONF
AU  - Misković, Goran
AU  - Aleksić, Obrad
AU  - Nikolić, Maria Vesna
AU  - Nicolics, Johann
AU  - Radosavljević, Goran
AU  - Vasiljević, Zorka Z
AU  - Luković, Miloljub
AU  - Smetana, Walter
PY  - 2016
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/966
AB  - This research is focused on structural and electrical characterisation of tin oxide (SnO2) applied as a thick film and investigation of its properties as gas sensitive material. Micron sized SnO2 powder was milled in an agate mill for six hours to fabricate SnO2 nanopowder, which was afterwards sieved by 325 mesh sieve and characterized by XRD and SEM. This powder was used as functional part in the production of thick film tin oxide paste containing a resin vehicle with 4 wt. % nanosize glass frits acting as permanent binder. The glass frits where additionally milled for twelve hours in the agate mills to nanosized powder and sieved by a 325 mesh sieve as well. The achieved thick film paste was screen printed on alumina and fired at 850 degrees C peak temperature for 10 minutes in air. After the sintering process, thick film samples where characterized by X-ray powder diffraction (XRD) and scanning electron microscopy (SEM). The reflectivity was measured on the same samples by UV-VIS spectrophotometer: the band gap was determined from the slope of reflectance. After that a matrix of different interdigitated electrode structure of PdAg paste was printed and sintered using the mentioned sintering conditions. The tin oxide thick film was printed over the interdigitated electrodes as a top layer and sintered again under the same conditions. The total electrical resistance was measured as a function of the electrode spacing and temperature. A negative temperature coefficient (NTC) was identified and measured in the range from room temperature (27 degrees C) to 180 degrees C in a climate chamber. Finally the samples were placed into a gas reactor with NOx and CO gas and the resistance was measured in the same temperature range (27 degrees C-200 degrees C).
PB  - IOP Publishing Ltd, Bristol
C3  - 5th International Conference on Materials and Applications for Sensors and Transducers (Ic-Mast2015)
T1  - Nanostructured SnO2 thick films for gas sensor application: analysis of structural and electronic properties
VL  - 108
DO  - 10.1088/1757-899X/108/1/012003
ER  - 

@conference{
author = "Misković, Goran and Aleksić, Obrad and Nikolić, Maria Vesna and Nicolics, Johann and Radosavljević, Goran and Vasiljević, Zorka Z and Luković, Miloljub and Smetana, Walter",
year = "2016",
abstract = "This research is focused on structural and electrical characterisation of tin oxide (SnO2) applied as a thick film and investigation of its properties as gas sensitive material. Micron sized SnO2 powder was milled in an agate mill for six hours to fabricate SnO2 nanopowder, which was afterwards sieved by 325 mesh sieve and characterized by XRD and SEM. This powder was used as functional part in the production of thick film tin oxide paste containing a resin vehicle with 4 wt. % nanosize glass frits acting as permanent binder. The glass frits where additionally milled for twelve hours in the agate mills to nanosized powder and sieved by a 325 mesh sieve as well. The achieved thick film paste was screen printed on alumina and fired at 850 degrees C peak temperature for 10 minutes in air. After the sintering process, thick film samples where characterized by X-ray powder diffraction (XRD) and scanning electron microscopy (SEM). The reflectivity was measured on the same samples by UV-VIS spectrophotometer: the band gap was determined from the slope of reflectance. After that a matrix of different interdigitated electrode structure of PdAg paste was printed and sintered using the mentioned sintering conditions. The tin oxide thick film was printed over the interdigitated electrodes as a top layer and sintered again under the same conditions. The total electrical resistance was measured as a function of the electrode spacing and temperature. A negative temperature coefficient (NTC) was identified and measured in the range from room temperature (27 degrees C) to 180 degrees C in a climate chamber. Finally the samples were placed into a gas reactor with NOx and CO gas and the resistance was measured in the same temperature range (27 degrees C-200 degrees C).",
publisher = "IOP Publishing Ltd, Bristol",
journal = "5th International Conference on Materials and Applications for Sensors and Transducers (Ic-Mast2015)",
title = "Nanostructured SnO2 thick films for gas sensor application: analysis of structural and electronic properties",
volume = "108",
doi = "10.1088/1757-899X/108/1/012003"
}

Misković, G., Aleksić, O., Nikolić, M. V., Nicolics, J., Radosavljević, G., Vasiljević, Z. Z., Luković, M.,& Smetana, W.. (2016). Nanostructured SnO2 thick films for gas sensor application: analysis of structural and electronic properties. in 5th International Conference on Materials and Applications for Sensors and Transducers (Ic-Mast2015)
IOP Publishing Ltd, Bristol., 108.
https://doi.org/10.1088/1757-899X/108/1/012003

Misković G, Aleksić O, Nikolić MV, Nicolics J, Radosavljević G, Vasiljević ZZ, Luković M, Smetana W. Nanostructured SnO2 thick films for gas sensor application: analysis of structural and electronic properties. in 5th International Conference on Materials and Applications for Sensors and Transducers (Ic-Mast2015). 2016;108.
doi:10.1088/1757-899X/108/1/012003 .

Misković, Goran, Aleksić, Obrad, Nikolić, Maria Vesna, Nicolics, Johann, Radosavljević, Goran, Vasiljević, Zorka Z, Luković, Miloljub, Smetana, Walter, "Nanostructured SnO2 thick films for gas sensor application: analysis of structural and electronic properties" in 5th International Conference on Materials and Applications for Sensors and Transducers (Ic-Mast2015), 108 (2016),
https://doi.org/10.1088/1757-899X/108/1/012003 . .

TY  - CONF
AU  - Misković, G.
AU  - Luković, Miloljub
AU  - Nikolić, Maria Vesna
AU  - Vasiljević, Zorka Z
AU  - Nicolics, Johann
AU  - Aleksić, Obrad
PY  - 2016
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/944
AB  - Two pseudobrookite (PSB) containing pastes were composed of a mixture of starting nanopowders of hematite (alpha-Fe2O3) and anatase (TiO2) in the molar ratios 1: 1 (referred to as PSB-1) and 1:1.5 (referred to as PSB-1.5), respectively, organic vehicle and glass frit. The pastes were screen printed on alumina (Al2O3) substrates and sintered in a hybrid conveyor furnace at 850 degrees C/10 min in air. X-ray diffraction (XRD) and scanning electron microscopy (SEM) analysis showed that the resulting thick film samples were composed of pseudobrookite (Fe2TiO5) and also excess rutile (TiO2) in the case of PSB-1.5 samples with a small grained and relatively homogenous microstructure. An electric resistivity with negative temperature coefficient (NTC) was observed. An interdigitated electrode geometry was designed and different electrode spacing (0.2 and 0.25 mm) was analyzed. The electrode structure was printed of PdAg paste. The resistivity of pseudobrookite was measured and analyzed in view of possible applications as a sensor of environmental gases with sufficiently high sensitivity at operating temperatures lower than conventional gas sensor systems.
PB  - IEEE Computer Society
C3  - Proceedings of the International Spring Seminar on Electronics Technology
T1  - Analysis of electronic properties of pseudobrookite thick films with possible application for NO gas sensing
EP  - 391
SP  - 386
VL  - 2016-September
DO  - 10.1109/ISSE.2016.7563226
ER  - 

@conference{
author = "Misković, G. and Luković, Miloljub and Nikolić, Maria Vesna and Vasiljević, Zorka Z and Nicolics, Johann and Aleksić, Obrad",
year = "2016",
abstract = "Two pseudobrookite (PSB) containing pastes were composed of a mixture of starting nanopowders of hematite (alpha-Fe2O3) and anatase (TiO2) in the molar ratios 1: 1 (referred to as PSB-1) and 1:1.5 (referred to as PSB-1.5), respectively, organic vehicle and glass frit. The pastes were screen printed on alumina (Al2O3) substrates and sintered in a hybrid conveyor furnace at 850 degrees C/10 min in air. X-ray diffraction (XRD) and scanning electron microscopy (SEM) analysis showed that the resulting thick film samples were composed of pseudobrookite (Fe2TiO5) and also excess rutile (TiO2) in the case of PSB-1.5 samples with a small grained and relatively homogenous microstructure. An electric resistivity with negative temperature coefficient (NTC) was observed. An interdigitated electrode geometry was designed and different electrode spacing (0.2 and 0.25 mm) was analyzed. The electrode structure was printed of PdAg paste. The resistivity of pseudobrookite was measured and analyzed in view of possible applications as a sensor of environmental gases with sufficiently high sensitivity at operating temperatures lower than conventional gas sensor systems.",
publisher = "IEEE Computer Society",
journal = "Proceedings of the International Spring Seminar on Electronics Technology",
title = "Analysis of electronic properties of pseudobrookite thick films with possible application for NO gas sensing",
pages = "391-386",
volume = "2016-September",
doi = "10.1109/ISSE.2016.7563226"
}

Misković, G., Luković, M., Nikolić, M. V., Vasiljević, Z. Z., Nicolics, J.,& Aleksić, O.. (2016). Analysis of electronic properties of pseudobrookite thick films with possible application for NO gas sensing. in Proceedings of the International Spring Seminar on Electronics Technology
IEEE Computer Society., 2016-September, 386-391.
https://doi.org/10.1109/ISSE.2016.7563226

Misković G, Luković M, Nikolić MV, Vasiljević ZZ, Nicolics J, Aleksić O. Analysis of electronic properties of pseudobrookite thick films with possible application for NO gas sensing. in Proceedings of the International Spring Seminar on Electronics Technology. 2016;2016-September:386-391.
doi:10.1109/ISSE.2016.7563226 .

Misković, G., Luković, Miloljub, Nikolić, Maria Vesna, Vasiljević, Zorka Z, Nicolics, Johann, Aleksić, Obrad, "Analysis of electronic properties of pseudobrookite thick films with possible application for NO gas sensing" in Proceedings of the International Spring Seminar on Electronics Technology, 2016-September (2016):386-391,
https://doi.org/10.1109/ISSE.2016.7563226 . .

TY  - JOUR
AU  - Milutinov, Miodrag M.
AU  - Nikolić, Maria Vesna
AU  - Luković, Miloljub
AU  - Blaz, Nelu V.
AU  - Labus, Nebojša J.
AU  - Živanov, Ljiljana D
AU  - Aleksić, Obrad
PY  - 2016
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1013
AB  - In this work we have analyzed how milling starting commercial Mn-Zn powder prior to the sintering process has an influence on electrical conductivity, relative permittivity and complex impedance in the frequency range from 100 Hz to 1 GHz and relative permeability in the frequency range 1-500 MHz. Starting powders additionally were milled for 30, 60, 120 and 240 min followed by sintering disk samples between 900 and 1300 A degrees C. Structural properties were analyzed using XRD and SEM analysis. Milling the starting powder reduced grain and crystallite size, but longer milling leads to agglomeration and consequently an inhomogeneous microstructure that was more expressed at higher sintering temperatures. Milling the starting powder improved relative permeability, reaching a maximum for samples of starting powder milled for 60 min and sintered at 1200 A degrees C.
PB  - Springer, Dordrecht
T2  - Journal of Materials Science-Materials in Electronics
T1  - Influence of starting powder milling on structural properties, complex impedance, electrical conductivity and permeability of Mn-Zn ferrite
EP  - 11865
IS  - 11
SP  - 11856
VL  - 27
DO  - 10.1007/s10854-016-5328-1
ER  - 

@article{
author = "Milutinov, Miodrag M. and Nikolić, Maria Vesna and Luković, Miloljub and Blaz, Nelu V. and Labus, Nebojša J. and Živanov, Ljiljana D and Aleksić, Obrad",
year = "2016",
abstract = "In this work we have analyzed how milling starting commercial Mn-Zn powder prior to the sintering process has an influence on electrical conductivity, relative permittivity and complex impedance in the frequency range from 100 Hz to 1 GHz and relative permeability in the frequency range 1-500 MHz. Starting powders additionally were milled for 30, 60, 120 and 240 min followed by sintering disk samples between 900 and 1300 A degrees C. Structural properties were analyzed using XRD and SEM analysis. Milling the starting powder reduced grain and crystallite size, but longer milling leads to agglomeration and consequently an inhomogeneous microstructure that was more expressed at higher sintering temperatures. Milling the starting powder improved relative permeability, reaching a maximum for samples of starting powder milled for 60 min and sintered at 1200 A degrees C.",
publisher = "Springer, Dordrecht",
journal = "Journal of Materials Science-Materials in Electronics",
title = "Influence of starting powder milling on structural properties, complex impedance, electrical conductivity and permeability of Mn-Zn ferrite",
pages = "11865-11856",
number = "11",
volume = "27",
doi = "10.1007/s10854-016-5328-1"
}

Milutinov, M. M., Nikolić, M. V., Luković, M., Blaz, N. V., Labus, N. J., Živanov, L. D.,& Aleksić, O.. (2016). Influence of starting powder milling on structural properties, complex impedance, electrical conductivity and permeability of Mn-Zn ferrite. in Journal of Materials Science-Materials in Electronics
Springer, Dordrecht., 27(11), 11856-11865.
https://doi.org/10.1007/s10854-016-5328-1

Milutinov MM, Nikolić MV, Luković M, Blaz NV, Labus NJ, Živanov LD, Aleksić O. Influence of starting powder milling on structural properties, complex impedance, electrical conductivity and permeability of Mn-Zn ferrite. in Journal of Materials Science-Materials in Electronics. 2016;27(11):11856-11865.
doi:10.1007/s10854-016-5328-1 .

Milutinov, Miodrag M., Nikolić, Maria Vesna, Luković, Miloljub, Blaz, Nelu V., Labus, Nebojša J., Živanov, Ljiljana D, Aleksić, Obrad, "Influence of starting powder milling on structural properties, complex impedance, electrical conductivity and permeability of Mn-Zn ferrite" in Journal of Materials Science-Materials in Electronics, 27, no. 11 (2016):11856-11865,
https://doi.org/10.1007/s10854-016-5328-1 . .

TY  - JOUR
AU  - Aleksić, Obrad
AU  - Nikolić, Maria Vesna
AU  - Luković, Miloljub
AU  - Stanimirović, Zdravko I.
AU  - Stanimirović, Ivanka P.
AU  - Sibinoski, Latko Z.
PY  - 2016
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/948
AB  - A heat loss flowmeter for measuring the volume flow rate of water in real time (t) was formed using two thick film segmented thermistors, range constant voltage (RCV) power supply, acquisition card, PC, and software. The input water temperature T-w(t) was measured by a cold thermistor, while the water flow rate Q(t) was determined using the heat loss principle by measuring the self-heated thermistor current I(t). The flowmeter inertia, stability, and accuracy were measured and analyzed on a flowmeter prototype in real-time and real conditions on the water mains. The flowmeter response was measured for different durations of step input water flow-out functions and intervals between steps. An independent ultrasonic flowmeter was connected in series with the thermal flowmeter to measure the ordered input water flow functions. The realized intelligent functions in real time were: measuring the input water temperature T-w(t) and self-heating temperature T-s(t), auto-selection of RCV supply voltage U(Tw), determination and modeling of the water flow rate in real time Q(t), determination of the water volume V(t), and determination of the thermal gradient on the self-heating thermistor as a water flow indicator Delta Rs(t).
PB  - IEEE-Inst Electrical Electronics Engineers Inc, Piscataway
T2  - IEEE Sensors Journal
T1  - The Response of a Heat Loss Flowmeter in a Water Pipe Under Changing Flow Conditions
EP  - 2941
IS  - 9
SP  - 2935
VL  - 16
DO  - 10.1109/JSEN.2016.2529685
ER  - 

@article{
author = "Aleksić, Obrad and Nikolić, Maria Vesna and Luković, Miloljub and Stanimirović, Zdravko I. and Stanimirović, Ivanka P. and Sibinoski, Latko Z.",
year = "2016",
abstract = "A heat loss flowmeter for measuring the volume flow rate of water in real time (t) was formed using two thick film segmented thermistors, range constant voltage (RCV) power supply, acquisition card, PC, and software. The input water temperature T-w(t) was measured by a cold thermistor, while the water flow rate Q(t) was determined using the heat loss principle by measuring the self-heated thermistor current I(t). The flowmeter inertia, stability, and accuracy were measured and analyzed on a flowmeter prototype in real-time and real conditions on the water mains. The flowmeter response was measured for different durations of step input water flow-out functions and intervals between steps. An independent ultrasonic flowmeter was connected in series with the thermal flowmeter to measure the ordered input water flow functions. The realized intelligent functions in real time were: measuring the input water temperature T-w(t) and self-heating temperature T-s(t), auto-selection of RCV supply voltage U(Tw), determination and modeling of the water flow rate in real time Q(t), determination of the water volume V(t), and determination of the thermal gradient on the self-heating thermistor as a water flow indicator Delta Rs(t).",
publisher = "IEEE-Inst Electrical Electronics Engineers Inc, Piscataway",
journal = "IEEE Sensors Journal",
title = "The Response of a Heat Loss Flowmeter in a Water Pipe Under Changing Flow Conditions",
pages = "2941-2935",
number = "9",
volume = "16",
doi = "10.1109/JSEN.2016.2529685"
}

Aleksić, O., Nikolić, M. V., Luković, M., Stanimirović, Z. I., Stanimirović, I. P.,& Sibinoski, L. Z.. (2016). The Response of a Heat Loss Flowmeter in a Water Pipe Under Changing Flow Conditions. in IEEE Sensors Journal
IEEE-Inst Electrical Electronics Engineers Inc, Piscataway., 16(9), 2935-2941.
https://doi.org/10.1109/JSEN.2016.2529685

Aleksić O, Nikolić MV, Luković M, Stanimirović ZI, Stanimirović IP, Sibinoski LZ. The Response of a Heat Loss Flowmeter in a Water Pipe Under Changing Flow Conditions. in IEEE Sensors Journal. 2016;16(9):2935-2941.
doi:10.1109/JSEN.2016.2529685 .

Aleksić, Obrad, Nikolić, Maria Vesna, Luković, Miloljub, Stanimirović, Zdravko I., Stanimirović, Ivanka P., Sibinoski, Latko Z., "The Response of a Heat Loss Flowmeter in a Water Pipe Under Changing Flow Conditions" in IEEE Sensors Journal, 16, no. 9 (2016):2935-2941,
https://doi.org/10.1109/JSEN.2016.2529685 . .

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  - Vasiljević, Zorka Z
AU  - Luković, Miloljub
AU  - Nikolić, Maria Vesna
AU  - Tasić, Nikola
AU  - Mitrić, Miodrag
AU  - Aleksić, Obrad
PY  - 2015
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/875
AB  - Thick films using starting nanopowders of TiO2 (anatase 99.7%) and alpha-Fe2O3 (hematite) mixed in the weight ratios 60:40 and 40:60 for thick film paste were fabricated by screen printing technology on an alumina substrate. Samples were sintered at temperatures of 800-950 degrees C for 60 min. Structural and electronic properties were analyzed by XRD and SEM analysis, UV/vis spectroscopy and current voltage analysis in view of potential application as gas sensors and anodes in photoelectrochemical cells for hydrogen generation and water splitting. XRD analysis showed that at 800 degrees C monoclinic pseudobrookite formed and anatase had transformed into rutile. Increase in sintering temperature lead to a gradual transformation of monoclinic pseudobrookite into the orthorhombic phase. SEM analysis showed that a homogenous small grain structure was obtained especially in the case of thick film samples with the 40:60 ratio of starting anatase and hematite sintered at 850 degrees C.
PB  - Elsevier Sci Ltd, Oxford
T2  - Ceramics International
T1  - Nanostructured Fe2O3/TiO2 thick films: Analysis of structural and electronic properties
EP  - 6897
IS  - 5
SP  - 6889
VL  - 41
DO  - 10.1016/j.ceramint.2015.01.141
ER  - 

@article{
author = "Vasiljević, Zorka Z and Luković, Miloljub and Nikolić, Maria Vesna and Tasić, Nikola and Mitrić, Miodrag and Aleksić, Obrad",
year = "2015",
abstract = "Thick films using starting nanopowders of TiO2 (anatase 99.7%) and alpha-Fe2O3 (hematite) mixed in the weight ratios 60:40 and 40:60 for thick film paste were fabricated by screen printing technology on an alumina substrate. Samples were sintered at temperatures of 800-950 degrees C for 60 min. Structural and electronic properties were analyzed by XRD and SEM analysis, UV/vis spectroscopy and current voltage analysis in view of potential application as gas sensors and anodes in photoelectrochemical cells for hydrogen generation and water splitting. XRD analysis showed that at 800 degrees C monoclinic pseudobrookite formed and anatase had transformed into rutile. Increase in sintering temperature lead to a gradual transformation of monoclinic pseudobrookite into the orthorhombic phase. SEM analysis showed that a homogenous small grain structure was obtained especially in the case of thick film samples with the 40:60 ratio of starting anatase and hematite sintered at 850 degrees C.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Ceramics International",
title = "Nanostructured Fe2O3/TiO2 thick films: Analysis of structural and electronic properties",
pages = "6897-6889",
number = "5",
volume = "41",
doi = "10.1016/j.ceramint.2015.01.141"
}

Vasiljević, Z. Z., Luković, M., Nikolić, M. V., Tasić, N., Mitrić, M.,& Aleksić, O.. (2015). Nanostructured Fe2O3/TiO2 thick films: Analysis of structural and electronic properties. in Ceramics International
Elsevier Sci Ltd, Oxford., 41(5), 6889-6897.
https://doi.org/10.1016/j.ceramint.2015.01.141

Vasiljević ZZ, Luković M, Nikolić MV, Tasić N, Mitrić M, Aleksić O. Nanostructured Fe2O3/TiO2 thick films: Analysis of structural and electronic properties. in Ceramics International. 2015;41(5):6889-6897.
doi:10.1016/j.ceramint.2015.01.141 .

Vasiljević, Zorka Z, Luković, Miloljub, Nikolić, Maria Vesna, Tasić, Nikola, Mitrić, Miodrag, Aleksić, Obrad, "Nanostructured Fe2O3/TiO2 thick films: Analysis of structural and electronic properties" in Ceramics International, 41, no. 5 (2015):6889-6897,
https://doi.org/10.1016/j.ceramint.2015.01.141 . .

TY  - JOUR
AU  - Nikolić, Pantelija M.
AU  - Paraskevopoulos, K.M.
AU  - Zorba, T.T.
AU  - Vasiljević, Zorka Z
AU  - Pavlidou, E.
AU  - Vujatović, Stevan S.
AU  - Blagojević, Vladimir
AU  - Aleksić, Obrad
AU  - Bojicic, Aleksandar
AU  - Nikolić, Maria Vesna
PY  - 2015
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/824
AB  - PbTe single crystals doped with monovalent Au or Cu were grown using the Bridgman method. Far infrared reflectivity spectra were measured at room temperature for all samples and plasma minima were registered. These experimental spectra were numerically analyzed and optical parameters were calculated. All the samples of PbTe doped with Au or Cu were of the "n" type. The properties of these compositions were analyzed and compared with PbTe containing other dopants. The samples of PbTe doped with only 3.3 at% Au were the best among the PbTe + Au samples having the lowest plasma frequency and the highest mobility of free carriers-electrons, while PbTe doped with Cu was the opposite. Samples with the lowest Cu concentration of 0.23 at% Cu had the best properties. Thermal diffusivity and electronic transport properties of the same PbTe doped samples were also investigated using a photoacoustic (PA) method with the transmission detection configuration. The results obtained with the far infrared and photoacoustic characterization of PbTe doped samples were compared and discussed. Both methods confirmed that when PbTe was doped with 3.3 at% Au, thermoelectric and electrical properties of this doped semiconductor were both significantly improved, so Au as a dopant in PbTe could be used as a new high quality thermoelectric material.
PB  - Hindawi Ltd, London
T2  - Advances in Materials Science and Engineering
T1  - Lead Telluride Doped with Au as a Very Promising Material for Thermoelectric Applications
VL  - 2015
DO  - 10.1155/2015/283782
ER  - 

@article{
author = "Nikolić, Pantelija M. and Paraskevopoulos, K.M. and Zorba, T.T. and Vasiljević, Zorka Z and Pavlidou, E. and Vujatović, Stevan S. and Blagojević, Vladimir and Aleksić, Obrad and Bojicic, Aleksandar and Nikolić, Maria Vesna",
year = "2015",
abstract = "PbTe single crystals doped with monovalent Au or Cu were grown using the Bridgman method. Far infrared reflectivity spectra were measured at room temperature for all samples and plasma minima were registered. These experimental spectra were numerically analyzed and optical parameters were calculated. All the samples of PbTe doped with Au or Cu were of the "n" type. The properties of these compositions were analyzed and compared with PbTe containing other dopants. The samples of PbTe doped with only 3.3 at% Au were the best among the PbTe + Au samples having the lowest plasma frequency and the highest mobility of free carriers-electrons, while PbTe doped with Cu was the opposite. Samples with the lowest Cu concentration of 0.23 at% Cu had the best properties. Thermal diffusivity and electronic transport properties of the same PbTe doped samples were also investigated using a photoacoustic (PA) method with the transmission detection configuration. The results obtained with the far infrared and photoacoustic characterization of PbTe doped samples were compared and discussed. Both methods confirmed that when PbTe was doped with 3.3 at% Au, thermoelectric and electrical properties of this doped semiconductor were both significantly improved, so Au as a dopant in PbTe could be used as a new high quality thermoelectric material.",
publisher = "Hindawi Ltd, London",
journal = "Advances in Materials Science and Engineering",
title = "Lead Telluride Doped with Au as a Very Promising Material for Thermoelectric Applications",
volume = "2015",
doi = "10.1155/2015/283782"
}

Nikolić, P. M., Paraskevopoulos, K.M., Zorba, T.T., Vasiljević, Z. Z., Pavlidou, E., Vujatović, S. S., Blagojević, V., Aleksić, O., Bojicic, A.,& Nikolić, M. V.. (2015). Lead Telluride Doped with Au as a Very Promising Material for Thermoelectric Applications. in Advances in Materials Science and Engineering
Hindawi Ltd, London., 2015.
https://doi.org/10.1155/2015/283782

Nikolić PM, Paraskevopoulos K, Zorba T, Vasiljević ZZ, Pavlidou E, Vujatović SS, Blagojević V, Aleksić O, Bojicic A, Nikolić MV. Lead Telluride Doped with Au as a Very Promising Material for Thermoelectric Applications. in Advances in Materials Science and Engineering. 2015;2015.
doi:10.1155/2015/283782 .

Nikolić, Pantelija M., Paraskevopoulos, K.M., Zorba, T.T., Vasiljević, Zorka Z, Pavlidou, E., Vujatović, Stevan S., Blagojević, Vladimir, Aleksić, Obrad, Bojicic, Aleksandar, Nikolić, Maria Vesna, "Lead Telluride Doped with Au as a Very Promising Material for Thermoelectric Applications" in Advances in Materials Science and Engineering, 2015 (2015),
https://doi.org/10.1155/2015/283782 . .

TY  - CONF
AU  - Misković, G.
AU  - Hrovat, M.
AU  - Drnovsek, S.
AU  - Nikolić, Maria Vesna
AU  - Aleksić, Obrad
AU  - Radosavljević, Goran
PY  - 2015
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/927
AB  - If the material is being sintered, grain size of its particles will depend on the sintering temperature, time of the sintering and the pressure applied on the material while sintering. It is well known that on the lower sintering temperatures grain size of the nano material is relatively small and thus the active area is large. Due to the low sintering temperature, high material porosity is expected as well. With a decrease of grain size, gas sensitive materials have larger selectivity, higher sensitivity, sensor response increases steeply and they are more immune to poisoning. The core of the investigation is to observe the influence of sintering temperature on grain size of the TiO2 nano-paste and to determine its reflection on the material porosity. For the realization of gas sensors using Low Temperature Co-Fired Ceramic (LTCC) or High Temperature Co-Fired Ceramic (HTCC) technology, specimens have to be sintered at relatively high temperatures. For the first interaction, custom-designed TiO2 nano-paste has been deposited on a sintered alumina (Al2O3) substrates using screen printing. Specimens have been sintered at peak temperatures in a range of 800 degrees C - 1500 degrees C for 30 minutes and afterwards they have been characterized with Scanning Electron Microscopy (SEM) and energy dispersive x-ray spectroscopy EDS.
PB  - IEEE Computer Society
C3  - Proceedings of the International Spring Seminar on Electronics Technology
T1  - Grain Size and Porosity Dependence of Titanium Dioxide Nano-Paste on Sintering Temperature for Gas Sensing Application
EP  - 407
SP  - 402
VL  - 2015-September
DO  - 10.1109/ISSE.2015.7248030
ER  - 

@conference{
author = "Misković, G. and Hrovat, M. and Drnovsek, S. and Nikolić, Maria Vesna and Aleksić, Obrad and Radosavljević, Goran",
year = "2015",
abstract = "If the material is being sintered, grain size of its particles will depend on the sintering temperature, time of the sintering and the pressure applied on the material while sintering. It is well known that on the lower sintering temperatures grain size of the nano material is relatively small and thus the active area is large. Due to the low sintering temperature, high material porosity is expected as well. With a decrease of grain size, gas sensitive materials have larger selectivity, higher sensitivity, sensor response increases steeply and they are more immune to poisoning. The core of the investigation is to observe the influence of sintering temperature on grain size of the TiO2 nano-paste and to determine its reflection on the material porosity. For the realization of gas sensors using Low Temperature Co-Fired Ceramic (LTCC) or High Temperature Co-Fired Ceramic (HTCC) technology, specimens have to be sintered at relatively high temperatures. For the first interaction, custom-designed TiO2 nano-paste has been deposited on a sintered alumina (Al2O3) substrates using screen printing. Specimens have been sintered at peak temperatures in a range of 800 degrees C - 1500 degrees C for 30 minutes and afterwards they have been characterized with Scanning Electron Microscopy (SEM) and energy dispersive x-ray spectroscopy EDS.",
publisher = "IEEE Computer Society",
journal = "Proceedings of the International Spring Seminar on Electronics Technology",
title = "Grain Size and Porosity Dependence of Titanium Dioxide Nano-Paste on Sintering Temperature for Gas Sensing Application",
pages = "407-402",
volume = "2015-September",
doi = "10.1109/ISSE.2015.7248030"
}

Misković, G., Hrovat, M., Drnovsek, S., Nikolić, M. V., Aleksić, O.,& Radosavljević, G.. (2015). Grain Size and Porosity Dependence of Titanium Dioxide Nano-Paste on Sintering Temperature for Gas Sensing Application. in Proceedings of the International Spring Seminar on Electronics Technology
IEEE Computer Society., 2015-September, 402-407.
https://doi.org/10.1109/ISSE.2015.7248030

Misković G, Hrovat M, Drnovsek S, Nikolić MV, Aleksić O, Radosavljević G. Grain Size and Porosity Dependence of Titanium Dioxide Nano-Paste on Sintering Temperature for Gas Sensing Application. in Proceedings of the International Spring Seminar on Electronics Technology. 2015;2015-September:402-407.
doi:10.1109/ISSE.2015.7248030 .

Misković, G., Hrovat, M., Drnovsek, S., Nikolić, Maria Vesna, Aleksić, Obrad, Radosavljević, Goran, "Grain Size and Porosity Dependence of Titanium Dioxide Nano-Paste on Sintering Temperature for Gas Sensing Application" in Proceedings of the International Spring Seminar on Electronics Technology, 2015-September (2015):402-407,
https://doi.org/10.1109/ISSE.2015.7248030 . .

TY  - JOUR
AU  - Vasiljević, Zorka Z
AU  - Aleksić, Obrad
AU  - Nikolić, Maria Vesna
AU  - Labus, Nebojša J.
AU  - Radovanović, Milan
AU  - Luković, Miloljub
PY  - 2014
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/783
AB  - Starting nanopowders of TiO2 (anatase 99.7%) and alpha-Fe2O3 (hematite) were mixed in the weight ratios 60:40 and 40:60. Green samples were sintered in the temperature range 750-1250 degrees C in air. Structural, morphological and electrical studies were carried out using XRD, SEM and EDS analysis, Hall measurements and electrical conductivity measurements. The aim was analyzing the influence of the starting nanopowder structure on the resulting sample composition, density, grain size and electrical resistivity in view of tailoring properties for developing different applications such as anodes for photoelectrochemical cells, photocatalysts and gas sensors. Compared to pure anatase samples, the presence of hematite lowered the temperature of completion of the anatase to rutile phase transformation to 850 degrees C. Formation of pseudobrookite was also noted at this temperature. Higher sintering temperatures lead to increased sample density, changes in grain size (grain growth and inhomogenous microstructure) and decreased electric resistivity.
PB  - Elsevier Sci Ltd, Oxford
T2  - Ceramics International
T1  - Structural and electrical properties of sintered Fe2O3/TiO2 nanopowder mixtures
EP  - 15141
IS  - 9
SP  - 15131
VL  - 40
DO  - 10.1016/j.ceramint.2014.06.126
ER  - 

@article{
author = "Vasiljević, Zorka Z and Aleksić, Obrad and Nikolić, Maria Vesna and Labus, Nebojša J. and Radovanović, Milan and Luković, Miloljub",
year = "2014",
abstract = "Starting nanopowders of TiO2 (anatase 99.7%) and alpha-Fe2O3 (hematite) were mixed in the weight ratios 60:40 and 40:60. Green samples were sintered in the temperature range 750-1250 degrees C in air. Structural, morphological and electrical studies were carried out using XRD, SEM and EDS analysis, Hall measurements and electrical conductivity measurements. The aim was analyzing the influence of the starting nanopowder structure on the resulting sample composition, density, grain size and electrical resistivity in view of tailoring properties for developing different applications such as anodes for photoelectrochemical cells, photocatalysts and gas sensors. Compared to pure anatase samples, the presence of hematite lowered the temperature of completion of the anatase to rutile phase transformation to 850 degrees C. Formation of pseudobrookite was also noted at this temperature. Higher sintering temperatures lead to increased sample density, changes in grain size (grain growth and inhomogenous microstructure) and decreased electric resistivity.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Ceramics International",
title = "Structural and electrical properties of sintered Fe2O3/TiO2 nanopowder mixtures",
pages = "15141-15131",
number = "9",
volume = "40",
doi = "10.1016/j.ceramint.2014.06.126"
}

Vasiljević, Z. Z., Aleksić, O., Nikolić, M. V., Labus, N. J., Radovanović, M.,& Luković, M.. (2014). Structural and electrical properties of sintered Fe2O3/TiO2 nanopowder mixtures. in Ceramics International
Elsevier Sci Ltd, Oxford., 40(9), 15131-15141.
https://doi.org/10.1016/j.ceramint.2014.06.126

Vasiljević ZZ, Aleksić O, Nikolić MV, Labus NJ, Radovanović M, Luković M. Structural and electrical properties of sintered Fe2O3/TiO2 nanopowder mixtures. in Ceramics International. 2014;40(9):15131-15141.
doi:10.1016/j.ceramint.2014.06.126 .

Vasiljević, Zorka Z, Aleksić, Obrad, Nikolić, Maria Vesna, Labus, Nebojša J., Radovanović, Milan, Luković, Miloljub, "Structural and electrical properties of sintered Fe2O3/TiO2 nanopowder mixtures" in Ceramics International, 40, no. 9 (2014):15131-15141,
https://doi.org/10.1016/j.ceramint.2014.06.126 . .

TY  - JOUR
AU  - Blaz, Nelu V.
AU  - Luković, Miloljub
AU  - Nikolić, Maria Vesna
AU  - Aleksić, Obrad
AU  - Živanov, Ljiljana D
PY  - 2014
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/768
AB  - Two types of heterotube ferrite bundle electromagnetic interference (EMI) suppressors were formed using Mn-Zn ferrite tubes with different inner and outer tube diameters. The suppressing principle based on magnetic coupling between the central tube and outer tubes in the bundle, e. g., primary half-turn to different short circuited secondary turns, was applied. Several different configurations, such as meander, frame, chain, cage, and short-circuited turns, were realized for both types of ferrite hetorotube bundle suppressors. They were characterized in the EMI frequency region (1-1000 MHz). The results obtained were compared mutually and with the standard half-turn wire configuration and other round core ferrite tube suppressors. Certain correlations were noticed between changes of characteristic parameter values, such as maximum of impedance Z(m), frequency of maximum impedance F-m, and suppressing range Delta f around F-m for all measured configurations. Possible applications as devices suitable for EMI suppressing were considered.
PB  - IEEE-Inst Electrical Electronics Engineers Inc, Piscataway
T2  - IEEE Transactions on Magnetics
T1  - Heterotube Mn-Zn Ferrite Bundle EMI Suppressor With Different Magnetic Coupling Configurations
IS  - 8
VL  - 50
DO  - 10.1109/TMAG.2014.2310436
ER  - 

@article{
author = "Blaz, Nelu V. and Luković, Miloljub and Nikolić, Maria Vesna and Aleksić, Obrad and Živanov, Ljiljana D",
year = "2014",
abstract = "Two types of heterotube ferrite bundle electromagnetic interference (EMI) suppressors were formed using Mn-Zn ferrite tubes with different inner and outer tube diameters. The suppressing principle based on magnetic coupling between the central tube and outer tubes in the bundle, e. g., primary half-turn to different short circuited secondary turns, was applied. Several different configurations, such as meander, frame, chain, cage, and short-circuited turns, were realized for both types of ferrite hetorotube bundle suppressors. They were characterized in the EMI frequency region (1-1000 MHz). The results obtained were compared mutually and with the standard half-turn wire configuration and other round core ferrite tube suppressors. Certain correlations were noticed between changes of characteristic parameter values, such as maximum of impedance Z(m), frequency of maximum impedance F-m, and suppressing range Delta f around F-m for all measured configurations. Possible applications as devices suitable for EMI suppressing were considered.",
publisher = "IEEE-Inst Electrical Electronics Engineers Inc, Piscataway",
journal = "IEEE Transactions on Magnetics",
title = "Heterotube Mn-Zn Ferrite Bundle EMI Suppressor With Different Magnetic Coupling Configurations",
number = "8",
volume = "50",
doi = "10.1109/TMAG.2014.2310436"
}

Blaz, N. V., Luković, M., Nikolić, M. V., Aleksić, O.,& Živanov, L. D.. (2014). Heterotube Mn-Zn Ferrite Bundle EMI Suppressor With Different Magnetic Coupling Configurations. in IEEE Transactions on Magnetics
IEEE-Inst Electrical Electronics Engineers Inc, Piscataway., 50(8).
https://doi.org/10.1109/TMAG.2014.2310436

Blaz NV, Luković M, Nikolić MV, Aleksić O, Živanov LD. Heterotube Mn-Zn Ferrite Bundle EMI Suppressor With Different Magnetic Coupling Configurations. in IEEE Transactions on Magnetics. 2014;50(8).
doi:10.1109/TMAG.2014.2310436 .

Blaz, Nelu V., Luković, Miloljub, Nikolić, Maria Vesna, Aleksić, Obrad, Živanov, Ljiljana D, "Heterotube Mn-Zn Ferrite Bundle EMI Suppressor With Different Magnetic Coupling Configurations" in IEEE Transactions on Magnetics, 50, no. 8 (2014),
https://doi.org/10.1109/TMAG.2014.2310436 . .

TY  - JOUR
AU  - Aleksić, Obrad
AU  - Nikolić, Maria Vesna
AU  - Luković, Miloljub
AU  - Nikolić, Nenad
AU  - Radojcic, Branka M
AU  - Radovanović, M
AU  - Vasiljević, Zorka Z
AU  - Mitrić, Miodrag
AU  - Nikolić, Pantelija M.
PY  - 2013
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/717
AB  - A simple ball milling/thermal treatment procedure was applied to obtain fine thermistor powders. Three different powder compositions were analyzed-Cu0.2Ni0.5Zn1.0Mn1.3O4, Cu0.25Ni0.5Zn1.0Mn1.25O4 and Cu0.4Ni0.5Mn2.1O4. XRD analysis showed that all three powder compositions had a cubic spinel structure. Correlation between the sintering temperature, structure and resulting electrical properties was analyzed on bulk samples. Thick film pastes were composed and segmented thick film thermistors were screen printed on alumina, dried and fired. SEM analysis revealed a typical dendrite structure with small grains and a developed surface area. Thick film sheet resistance was measured on a test matrix and the resistance decreased with increasing Cu content. The temperature dependence of sample resistance was measured in a climatic chamber enabling calculation of the material constant and activation energy. Aging of the obtained segmented thermistors was analyzed and the resistivity drift was 0.23% for the Cu0.2Ni0.5Zn1.0Mn1.3O4 NTC thick film thermistor confirming greater stability of thermistors containing Zn and Cu that in combination with the determined good thermistor characteristics make them good candidates for temperature and heat loss sensor applications.
PB  - Elsevier, Amsterdam
T2  - Materials Science and Engineering B-Advanced Functional Solid-State Materials
T1  - Preparation and characterization of Cu and Zn modified nickel manganite NTC powders and thick film thermistors
EP  - 210
IS  - 3
SP  - 202
VL  - 178
DO  - 10.1016/j.mseb.2012.11.003
ER  - 

@article{
author = "Aleksić, Obrad and Nikolić, Maria Vesna and Luković, Miloljub and Nikolić, Nenad and Radojcic, Branka M and Radovanović, M and Vasiljević, Zorka Z and Mitrić, Miodrag and Nikolić, Pantelija M.",
year = "2013",
abstract = "A simple ball milling/thermal treatment procedure was applied to obtain fine thermistor powders. Three different powder compositions were analyzed-Cu0.2Ni0.5Zn1.0Mn1.3O4, Cu0.25Ni0.5Zn1.0Mn1.25O4 and Cu0.4Ni0.5Mn2.1O4. XRD analysis showed that all three powder compositions had a cubic spinel structure. Correlation between the sintering temperature, structure and resulting electrical properties was analyzed on bulk samples. Thick film pastes were composed and segmented thick film thermistors were screen printed on alumina, dried and fired. SEM analysis revealed a typical dendrite structure with small grains and a developed surface area. Thick film sheet resistance was measured on a test matrix and the resistance decreased with increasing Cu content. The temperature dependence of sample resistance was measured in a climatic chamber enabling calculation of the material constant and activation energy. Aging of the obtained segmented thermistors was analyzed and the resistivity drift was 0.23% for the Cu0.2Ni0.5Zn1.0Mn1.3O4 NTC thick film thermistor confirming greater stability of thermistors containing Zn and Cu that in combination with the determined good thermistor characteristics make them good candidates for temperature and heat loss sensor applications.",
publisher = "Elsevier, Amsterdam",
journal = "Materials Science and Engineering B-Advanced Functional Solid-State Materials",
title = "Preparation and characterization of Cu and Zn modified nickel manganite NTC powders and thick film thermistors",
pages = "210-202",
number = "3",
volume = "178",
doi = "10.1016/j.mseb.2012.11.003"
}

Aleksić, O., Nikolić, M. V., Luković, M., Nikolić, N., Radojcic, B. M., Radovanović, M., Vasiljević, Z. Z., Mitrić, M.,& Nikolić, P. M.. (2013). Preparation and characterization of Cu and Zn modified nickel manganite NTC powders and thick film thermistors. in Materials Science and Engineering B-Advanced Functional Solid-State Materials
Elsevier, Amsterdam., 178(3), 202-210.
https://doi.org/10.1016/j.mseb.2012.11.003

Aleksić O, Nikolić MV, Luković M, Nikolić N, Radojcic BM, Radovanović M, Vasiljević ZZ, Mitrić M, Nikolić PM. Preparation and characterization of Cu and Zn modified nickel manganite NTC powders and thick film thermistors. in Materials Science and Engineering B-Advanced Functional Solid-State Materials. 2013;178(3):202-210.
doi:10.1016/j.mseb.2012.11.003 .

Aleksić, Obrad, Nikolić, Maria Vesna, Luković, Miloljub, Nikolić, Nenad, Radojcic, Branka M, Radovanović, M, Vasiljević, Zorka Z, Mitrić, Miodrag, Nikolić, Pantelija M., "Preparation and characterization of Cu and Zn modified nickel manganite NTC powders and thick film thermistors" in Materials Science and Engineering B-Advanced Functional Solid-State Materials, 178, no. 3 (2013):202-210,
https://doi.org/10.1016/j.mseb.2012.11.003 . .

TY  - JOUR
AU  - Aleksić, Obrad
AU  - Vasiljević, Zorka Z
AU  - Nikolić, Maria Vesna
AU  - Tasić, Nikola
AU  - Vuković, Marina
AU  - Marinković Stanojević, Zorica
AU  - Nikolić, Nenad
AU  - Nikolić, Pantelija M.
PY  - 2013
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/711
AB  - Nanostructured single layered (pure TiO2, pure alpha-Fe2O3 and mixed Fe2O3/TiO2 with two different oxide ratios, 2 : 3 and 3 : 2) and double layered (TiO2 layer over a Fe2O3 layer) thick films have been fabricated by screen printing technology on a glass substrate. The pastes used for film preparation were obtained by adding an organic vehicle to the oxide powders together with a small percentage of binding glass frit. Samples were dried up to 100 degrees C and sintered at 650 degrees C/60 minutes. Structural, morphological and optical studies have been carried out using XRD, SEM analyses and UV/Vis spectroscopy. The prepared pure and mixed Fe2O3/TiO2 thick films had a homogenous nanostructure without secondary phases. Indirect band gaps were determined from the measured transmission spectra and the obtained values are in the range of literature data.
PB  - Univerzitet u Novom Sadu - Tehnološki fakultet, Novi Sad
T2  - Processing and Application of Ceramics
T1  - Nanostructured Fe2O3/TiO2 thick films prepared by screen printing
EP  - 134
IS  - 3
SP  - 129
VL  - 7
DO  - 10.2298/PAC1303129A
ER  - 

@article{
author = "Aleksić, Obrad and Vasiljević, Zorka Z and Nikolić, Maria Vesna and Tasić, Nikola and Vuković, Marina and Marinković Stanojević, Zorica and Nikolić, Nenad and Nikolić, Pantelija M.",
year = "2013",
abstract = "Nanostructured single layered (pure TiO2, pure alpha-Fe2O3 and mixed Fe2O3/TiO2 with two different oxide ratios, 2 : 3 and 3 : 2) and double layered (TiO2 layer over a Fe2O3 layer) thick films have been fabricated by screen printing technology on a glass substrate. The pastes used for film preparation were obtained by adding an organic vehicle to the oxide powders together with a small percentage of binding glass frit. Samples were dried up to 100 degrees C and sintered at 650 degrees C/60 minutes. Structural, morphological and optical studies have been carried out using XRD, SEM analyses and UV/Vis spectroscopy. The prepared pure and mixed Fe2O3/TiO2 thick films had a homogenous nanostructure without secondary phases. Indirect band gaps were determined from the measured transmission spectra and the obtained values are in the range of literature data.",
publisher = "Univerzitet u Novom Sadu - Tehnološki fakultet, Novi Sad",
journal = "Processing and Application of Ceramics",
title = "Nanostructured Fe2O3/TiO2 thick films prepared by screen printing",
pages = "134-129",
number = "3",
volume = "7",
doi = "10.2298/PAC1303129A"
}

Aleksić, O., Vasiljević, Z. Z., Nikolić, M. V., Tasić, N., Vuković, M., Marinković Stanojević, Z., Nikolić, N.,& Nikolić, P. M.. (2013). Nanostructured Fe2O3/TiO2 thick films prepared by screen printing. in Processing and Application of Ceramics
Univerzitet u Novom Sadu - Tehnološki fakultet, Novi Sad., 7(3), 129-134.
https://doi.org/10.2298/PAC1303129A

Aleksić O, Vasiljević ZZ, Nikolić MV, Tasić N, Vuković M, Marinković Stanojević Z, Nikolić N, Nikolić PM. Nanostructured Fe2O3/TiO2 thick films prepared by screen printing. in Processing and Application of Ceramics. 2013;7(3):129-134.
doi:10.2298/PAC1303129A .

Aleksić, Obrad, Vasiljević, Zorka Z, Nikolić, Maria Vesna, Tasić, Nikola, Vuković, Marina, Marinković Stanojević, Zorica, Nikolić, Nenad, Nikolić, Pantelija M., "Nanostructured Fe2O3/TiO2 thick films prepared by screen printing" in Processing and Application of Ceramics, 7, no. 3 (2013):129-134,
https://doi.org/10.2298/PAC1303129A . .

TY  - JOUR
AU  - Nikolić, Pantelija M.
AU  - Paraskevopoulos, K.M.
AU  - Zorba, T.T.
AU  - Vasiljević, Zorka Z
AU  - Pavlidou, E.
AU  - Vujatović, Stevan S
AU  - Blagojević, V.
AU  - Aleksić, Obrad
AU  - Nikolić, Maria Vesna
PY  - 2013
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/683
AB  - PbTe single crystal samples doped with Mn and Yb were grown using the Bridgman method. Far infrared reflectivity spectra were measured at room temperature for samples with different impurity concentrations (total impurity concentration Mn+Yb varied between 0.59 and 2.52 at%, while the impurity Mn/Yb ratio varied between 0 and 3.48). All samples were of the "p" type. Plasma minimum was registered for all samples and varied between 114 and 198 cm(-1) depending on the total impurity concentration and ratio. Samples with lower plasma minimum had a higher free hole mobility, with the highest value of 7000 cm(2)/Vs determined for a sample with the highest Mn/Yb ratio of 3.48 (1.67 at.% Mn and 0.48 at.% Yb).
PB  - National Institute of Optoelectronics
T2  - Optoelectronics and Advanced Materials, Rapid Communications
T1  - Far infrared reflectivity spectra of lead-telluride doped with Mn and Yb
EP  - 366
IS  - 5-6
SP  - 362
VL  - 7
UR  - https://hdl.handle.net/21.15107/rcub_dais_374
ER  - 

@article{
author = "Nikolić, Pantelija M. and Paraskevopoulos, K.M. and Zorba, T.T. and Vasiljević, Zorka Z and Pavlidou, E. and Vujatović, Stevan S and Blagojević, V. and Aleksić, Obrad and Nikolić, Maria Vesna",
year = "2013",
abstract = "PbTe single crystal samples doped with Mn and Yb were grown using the Bridgman method. Far infrared reflectivity spectra were measured at room temperature for samples with different impurity concentrations (total impurity concentration Mn+Yb varied between 0.59 and 2.52 at%, while the impurity Mn/Yb ratio varied between 0 and 3.48). All samples were of the "p" type. Plasma minimum was registered for all samples and varied between 114 and 198 cm(-1) depending on the total impurity concentration and ratio. Samples with lower plasma minimum had a higher free hole mobility, with the highest value of 7000 cm(2)/Vs determined for a sample with the highest Mn/Yb ratio of 3.48 (1.67 at.% Mn and 0.48 at.% Yb).",
publisher = "National Institute of Optoelectronics",
journal = "Optoelectronics and Advanced Materials, Rapid Communications",
title = "Far infrared reflectivity spectra of lead-telluride doped with Mn and Yb",
pages = "366-362",
number = "5-6",
volume = "7",
url = "https://hdl.handle.net/21.15107/rcub_dais_374"
}

Nikolić, P. M., Paraskevopoulos, K.M., Zorba, T.T., Vasiljević, Z. Z., Pavlidou, E., Vujatović, S. S., Blagojević, V., Aleksić, O.,& Nikolić, M. V.. (2013). Far infrared reflectivity spectra of lead-telluride doped with Mn and Yb. in Optoelectronics and Advanced Materials, Rapid Communications
National Institute of Optoelectronics., 7(5-6), 362-366.
https://hdl.handle.net/21.15107/rcub_dais_374

Nikolić PM, Paraskevopoulos K, Zorba T, Vasiljević ZZ, Pavlidou E, Vujatović SS, Blagojević V, Aleksić O, Nikolić MV. Far infrared reflectivity spectra of lead-telluride doped with Mn and Yb. in Optoelectronics and Advanced Materials, Rapid Communications. 2013;7(5-6):362-366.
https://hdl.handle.net/21.15107/rcub_dais_374 .

Nikolić, Pantelija M., Paraskevopoulos, K.M., Zorba, T.T., Vasiljević, Zorka Z, Pavlidou, E., Vujatović, Stevan S, Blagojević, V., Aleksić, Obrad, Nikolić, Maria Vesna, "Far infrared reflectivity spectra of lead-telluride doped with Mn and Yb" in Optoelectronics and Advanced Materials, Rapid Communications, 7, no. 5-6 (2013):362-366,
https://hdl.handle.net/21.15107/rcub_dais_374 .

TY  - CONF
AU  - Nikolić, Maria Vesna
AU  - Aleksić, Obrad
AU  - Radojcic, Branka M
AU  - Luković, Miloljub
AU  - Nikolić, Nenad
AU  - Vasiljević, Zorka Z
PY  - 2013
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/636
AB  - NTC thermistor paste for printing thermal sensors on alumina was formed of very fine Ni0.5Cu0.2Zn1.0Mn1.3O4 thermistor powder obtained by a combined mechanical activation/thermal treatment process, organic vehicle and glass fit. Sheet resistivity was measured using an R-test matrix and it was much lower than the value determined for pure nickel manganite thermistors. The thermistor exponential coefficient was calculated from the R[T] diagram measured in the temperature range -30 to +120 degrees C in a climatic chamber. Thick film segmented thermistors with reduced dimensions (optimized construction) were printed sequentially layer by layer, dried and fired at 850 degrees C/10 min in air. Electrodes were printed of PdAg conductive and solderable paste. The samples obtained were characterized by electrical and thermal measurements. The obtained NTC segmented thermistors with reduced dimensions were applied in a thermal sensor for water flow in the water mains. It contained a "cold" thermistor for measuring input water temperature and a "self-heating" thermistor for measuring the dependence of water current on water flow rate at a set input voltage power. Initial measurements show that the thermal sensor system requires a low input voltage power making it much easier and safer for operation.
PB  - Trans Tech Publications Ltd, Durnten-Zurich
C3  - Materials and Applications for Sensors and Transducers Ii
T1  - Optimization and Application of NTC thick film segmented thermistors
EP  - +
SP  - 491
VL  - 543
DO  - 10.4028/www.scientific.net/KEM.543.491
ER  - 

@conference{
author = "Nikolić, Maria Vesna and Aleksić, Obrad and Radojcic, Branka M and Luković, Miloljub and Nikolić, Nenad and Vasiljević, Zorka Z",
year = "2013",
abstract = "NTC thermistor paste for printing thermal sensors on alumina was formed of very fine Ni0.5Cu0.2Zn1.0Mn1.3O4 thermistor powder obtained by a combined mechanical activation/thermal treatment process, organic vehicle and glass fit. Sheet resistivity was measured using an R-test matrix and it was much lower than the value determined for pure nickel manganite thermistors. The thermistor exponential coefficient was calculated from the R[T] diagram measured in the temperature range -30 to +120 degrees C in a climatic chamber. Thick film segmented thermistors with reduced dimensions (optimized construction) were printed sequentially layer by layer, dried and fired at 850 degrees C/10 min in air. Electrodes were printed of PdAg conductive and solderable paste. The samples obtained were characterized by electrical and thermal measurements. The obtained NTC segmented thermistors with reduced dimensions were applied in a thermal sensor for water flow in the water mains. It contained a "cold" thermistor for measuring input water temperature and a "self-heating" thermistor for measuring the dependence of water current on water flow rate at a set input voltage power. Initial measurements show that the thermal sensor system requires a low input voltage power making it much easier and safer for operation.",
publisher = "Trans Tech Publications Ltd, Durnten-Zurich",
journal = "Materials and Applications for Sensors and Transducers Ii",
title = "Optimization and Application of NTC thick film segmented thermistors",
pages = "+-491",
volume = "543",
doi = "10.4028/www.scientific.net/KEM.543.491"
}

Nikolić, M. V., Aleksić, O., Radojcic, B. M., Luković, M., Nikolić, N.,& Vasiljević, Z. Z.. (2013). Optimization and Application of NTC thick film segmented thermistors. in Materials and Applications for Sensors and Transducers Ii
Trans Tech Publications Ltd, Durnten-Zurich., 543, 491-+.
https://doi.org/10.4028/www.scientific.net/KEM.543.491

Nikolić MV, Aleksić O, Radojcic BM, Luković M, Nikolić N, Vasiljević ZZ. Optimization and Application of NTC thick film segmented thermistors. in Materials and Applications for Sensors and Transducers Ii. 2013;543:491-+.
doi:10.4028/www.scientific.net/KEM.543.491 .

Nikolić, Maria Vesna, Aleksić, Obrad, Radojcic, Branka M, Luković, Miloljub, Nikolić, Nenad, Vasiljević, Zorka Z, "Optimization and Application of NTC thick film segmented thermistors" in Materials and Applications for Sensors and Transducers Ii, 543 (2013):491-+,
https://doi.org/10.4028/www.scientific.net/KEM.543.491 . .

TY  - JOUR
AU  - Savić, Slavica M.
AU  - Nikolić, Maria Vesna
AU  - Paraskevopoulos, K.M.
AU  - Zorba, T.T.
AU  - Nikolić, Nenad
AU  - Blagojević, Vladimir D
AU  - Aleksić, Obrad
AU  - Branković, Goran
PY  - 2013
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/727
AB  - Nickel manganite powder synthesized by calcination of a stoichiometric mixture of manganese (MnO Aldrich 99.9%) and nickel oxide (NiO Merck, 99.5%) containing 0.5 wt% CoO and Fe2O3, was additionally mechanically activated in a high energy planetary ball mill for 5-60 min. The resulting powders were uniaxially pressed into disc shape pellets and then sintered for 60 min at 900 degrees C, 1050 degrees C and 1200 degrees C. Morphological changes of the obtained nickel manganite ceramics induced by mechanical activation were monitored using scanning electron microscopy, while changes in structural characteristics were followed using X-ray powder diffraction. Room temperature far infrared reflectivity spectra for all sintered samples were recorded in the frequency range between 50 cm(-1) land 1200 cm(-1). The observed spectra for all samples showed the presence of the same oscillators, but their intensities depended on the sintering temperature and the time of mechanical acivation. Transversal and longitudinal optical modes were calculated for six ionic oscillators (four strong, and two shoulders) belonging to the nickel manganite partially inverse spinel structure.
PB  - Elsevier Sci Ltd, Oxford
T2  - Ceramics International
T1  - Far infrared and micro structural studies of mechanically activated nickel manganite
EP  - 1247
IS  - 2
SP  - 1241
VL  - 39
DO  - 10.1016/j.ceramint.2012.07.054
ER  - 

@article{
author = "Savić, Slavica M. and Nikolić, Maria Vesna and Paraskevopoulos, K.M. and Zorba, T.T. and Nikolić, Nenad and Blagojević, Vladimir D and Aleksić, Obrad and Branković, Goran",
year = "2013",
abstract = "Nickel manganite powder synthesized by calcination of a stoichiometric mixture of manganese (MnO Aldrich 99.9%) and nickel oxide (NiO Merck, 99.5%) containing 0.5 wt% CoO and Fe2O3, was additionally mechanically activated in a high energy planetary ball mill for 5-60 min. The resulting powders were uniaxially pressed into disc shape pellets and then sintered for 60 min at 900 degrees C, 1050 degrees C and 1200 degrees C. Morphological changes of the obtained nickel manganite ceramics induced by mechanical activation were monitored using scanning electron microscopy, while changes in structural characteristics were followed using X-ray powder diffraction. Room temperature far infrared reflectivity spectra for all sintered samples were recorded in the frequency range between 50 cm(-1) land 1200 cm(-1). The observed spectra for all samples showed the presence of the same oscillators, but their intensities depended on the sintering temperature and the time of mechanical acivation. Transversal and longitudinal optical modes were calculated for six ionic oscillators (four strong, and two shoulders) belonging to the nickel manganite partially inverse spinel structure.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Ceramics International",
title = "Far infrared and micro structural studies of mechanically activated nickel manganite",
pages = "1247-1241",
number = "2",
volume = "39",
doi = "10.1016/j.ceramint.2012.07.054"
}

Savić, S. M., Nikolić, M. V., Paraskevopoulos, K.M., Zorba, T.T., Nikolić, N., Blagojević, V. D., Aleksić, O.,& Branković, G.. (2013). Far infrared and micro structural studies of mechanically activated nickel manganite. in Ceramics International
Elsevier Sci Ltd, Oxford., 39(2), 1241-1247.
https://doi.org/10.1016/j.ceramint.2012.07.054

Savić SM, Nikolić MV, Paraskevopoulos K, Zorba T, Nikolić N, Blagojević VD, Aleksić O, Branković G. Far infrared and micro structural studies of mechanically activated nickel manganite. in Ceramics International. 2013;39(2):1241-1247.
doi:10.1016/j.ceramint.2012.07.054 .

Savić, Slavica M., Nikolić, Maria Vesna, Paraskevopoulos, K.M., Zorba, T.T., Nikolić, Nenad, Blagojević, Vladimir D, Aleksić, Obrad, Branković, Goran, "Far infrared and micro structural studies of mechanically activated nickel manganite" in Ceramics International, 39, no. 2 (2013):1241-1247,
https://doi.org/10.1016/j.ceramint.2012.07.054 . .

TY  - JOUR
AU  - Luković, Miloljub
AU  - Nikolić, Maria Vesna
AU  - Blaz, Nelu V.
AU  - Živanov, Ljiljana D
AU  - Aleksić, Obrad
AU  - Lukić, Lazar S
PY  - 2013
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/685
AB  - A novel Mn-Zn ferrite round cable electromagnetic interference (EMI) suppressor with deep grooves and a secondary short circuit was constructed, realized and measured. Three steps were passed in novel suppressor development: from developing a suitable magnetic material, to constructing a suppressor device, to forming a new class of possible applications. Soft ferrite feedstock was formed from fine commercial Mn-Zn powder and a Solvent system binder based mainly on wax. Cylinder-shape cores with grooves were injected by powder injection molding (PIM) technology, chemically and thermally debinded and sintered at optimal conditions (1280 degrees C/2 h). The samples were aimed to serve as cores for EMI suppressors on cables. Their impedance versus frequency was measured using the core length as a parameter. After that, copper wire was placed into the grooves on the outside surface of cores to form a secondary coil and different configurations were considered. The contribution of the short circuit coil inserted into the grooves to EMI suppression was measured and analyzed also. Maximal impedance values can be achieved with a secondary short circuited winding which passes through every groove. It was also shown that ferrite cores of the same length could be used for different frequency ranges by changing the configuration of secondary short circuited windings.
PB  - IEEE-Inst Electrical Electronics Engineers Inc, Piscataway
T2  - IEEE Transactions on Magnetics
T1  - Mn-Zn Ferrite Round Cable EMI Suppressor With Deep Grooves and a Secondary Short Circuit for Different Frequency Ranges
EP  - 1177
IS  - 3
SP  - 1172
VL  - 49
DO  - 10.1109/TMAG.2012.2219064
ER  - 

@article{
author = "Luković, Miloljub and Nikolić, Maria Vesna and Blaz, Nelu V. and Živanov, Ljiljana D and Aleksić, Obrad and Lukić, Lazar S",
year = "2013",
abstract = "A novel Mn-Zn ferrite round cable electromagnetic interference (EMI) suppressor with deep grooves and a secondary short circuit was constructed, realized and measured. Three steps were passed in novel suppressor development: from developing a suitable magnetic material, to constructing a suppressor device, to forming a new class of possible applications. Soft ferrite feedstock was formed from fine commercial Mn-Zn powder and a Solvent system binder based mainly on wax. Cylinder-shape cores with grooves were injected by powder injection molding (PIM) technology, chemically and thermally debinded and sintered at optimal conditions (1280 degrees C/2 h). The samples were aimed to serve as cores for EMI suppressors on cables. Their impedance versus frequency was measured using the core length as a parameter. After that, copper wire was placed into the grooves on the outside surface of cores to form a secondary coil and different configurations were considered. The contribution of the short circuit coil inserted into the grooves to EMI suppression was measured and analyzed also. Maximal impedance values can be achieved with a secondary short circuited winding which passes through every groove. It was also shown that ferrite cores of the same length could be used for different frequency ranges by changing the configuration of secondary short circuited windings.",
publisher = "IEEE-Inst Electrical Electronics Engineers Inc, Piscataway",
journal = "IEEE Transactions on Magnetics",
title = "Mn-Zn Ferrite Round Cable EMI Suppressor With Deep Grooves and a Secondary Short Circuit for Different Frequency Ranges",
pages = "1177-1172",
number = "3",
volume = "49",
doi = "10.1109/TMAG.2012.2219064"
}

Luković, M., Nikolić, M. V., Blaz, N. V., Živanov, L. D., Aleksić, O.,& Lukić, L. S.. (2013). Mn-Zn Ferrite Round Cable EMI Suppressor With Deep Grooves and a Secondary Short Circuit for Different Frequency Ranges. in IEEE Transactions on Magnetics
IEEE-Inst Electrical Electronics Engineers Inc, Piscataway., 49(3), 1172-1177.
https://doi.org/10.1109/TMAG.2012.2219064

Luković M, Nikolić MV, Blaz NV, Živanov LD, Aleksić O, Lukić LS. Mn-Zn Ferrite Round Cable EMI Suppressor With Deep Grooves and a Secondary Short Circuit for Different Frequency Ranges. in IEEE Transactions on Magnetics. 2013;49(3):1172-1177.
doi:10.1109/TMAG.2012.2219064 .

Luković, Miloljub, Nikolić, Maria Vesna, Blaz, Nelu V., Živanov, Ljiljana D, Aleksić, Obrad, Lukić, Lazar S, "Mn-Zn Ferrite Round Cable EMI Suppressor With Deep Grooves and a Secondary Short Circuit for Different Frequency Ranges" in IEEE Transactions on Magnetics, 49, no. 3 (2013):1172-1177,
https://doi.org/10.1109/TMAG.2012.2219064 . .