TY  - JOUR
AU  - Aleksić, Stanko O.
AU  - Mitrović, Nebojša S.
AU  - Luković, Miloljub
AU  - Luković, Snežana
AU  - Nikolić, Nenad
PY  - 2021
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1397
AB  - Novel heat loss flowmeter for water consists of the small plastic housing and two NTC thick film segmented thermistors with reduced dimensions placed along the main axis. The segmented thermistors were printed using the modified nickel-manganese paste and sintered in air at 850 degrees C / 10 min in the conveyor furnace. The first thermistor Th-1 is cold and measures input water temperature and the second thermistor Th-2 is self-heated at constant voltage and measures water flow rate. A short switch mode operating cycle for the self-heating thermistor was introduced: 30s of self-heating from the initial state and after that 90s of natural cooling to the initial state. The self heating DC current in 30th second I-30 is recognized as the flowmeter response on stable water flow Q, while input water temperature T-w was used as a parameter. The flowmeter temperature range was divided in a few sub-ranges and adaptive DC voltage power supply (RCV) was introduced for each sub-range. The flowmeter measuring range and inaccuracy were compared with respective ones of other flowmeters.
PB  - IEEE-Inst Electrical Electronics Engineers Inc, Piscataway
T2  - IEEE Sensors Journal
T1  - Heat Loss Flowmeter for Water Based on Thick Film Thermistors in Power Save Regime
EP  - 206
IS  - 1
SP  - 199
VL  - 21
DO  - 10.1109/JSEN.2020.3015023
ER  - 

@article{
author = "Aleksić, Stanko O. and Mitrović, Nebojša S. and Luković, Miloljub and Luković, Snežana and Nikolić, Nenad",
year = "2021",
abstract = "Novel heat loss flowmeter for water consists of the small plastic housing and two NTC thick film segmented thermistors with reduced dimensions placed along the main axis. The segmented thermistors were printed using the modified nickel-manganese paste and sintered in air at 850 degrees C / 10 min in the conveyor furnace. The first thermistor Th-1 is cold and measures input water temperature and the second thermistor Th-2 is self-heated at constant voltage and measures water flow rate. A short switch mode operating cycle for the self-heating thermistor was introduced: 30s of self-heating from the initial state and after that 90s of natural cooling to the initial state. The self heating DC current in 30th second I-30 is recognized as the flowmeter response on stable water flow Q, while input water temperature T-w was used as a parameter. The flowmeter temperature range was divided in a few sub-ranges and adaptive DC voltage power supply (RCV) was introduced for each sub-range. The flowmeter measuring range and inaccuracy were compared with respective ones of other flowmeters.",
publisher = "IEEE-Inst Electrical Electronics Engineers Inc, Piscataway",
journal = "IEEE Sensors Journal",
title = "Heat Loss Flowmeter for Water Based on Thick Film Thermistors in Power Save Regime",
pages = "206-199",
number = "1",
volume = "21",
doi = "10.1109/JSEN.2020.3015023"
}

Aleksić, S. O., Mitrović, N. S., Luković, M., Luković, S.,& Nikolić, N.. (2021). Heat Loss Flowmeter for Water Based on Thick Film Thermistors in Power Save Regime. in IEEE Sensors Journal
IEEE-Inst Electrical Electronics Engineers Inc, Piscataway., 21(1), 199-206.
https://doi.org/10.1109/JSEN.2020.3015023

Aleksić SO, Mitrović NS, Luković M, Luković S, Nikolić N. Heat Loss Flowmeter for Water Based on Thick Film Thermistors in Power Save Regime. in IEEE Sensors Journal. 2021;21(1):199-206.
doi:10.1109/JSEN.2020.3015023 .

Aleksić, Stanko O., Mitrović, Nebojša S., Luković, Miloljub, Luković, Snežana, Nikolić, Nenad, "Heat Loss Flowmeter for Water Based on Thick Film Thermistors in Power Save Regime" in IEEE Sensors Journal, 21, no. 1 (2021):199-206,
https://doi.org/10.1109/JSEN.2020.3015023 . .

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  - Zlatkov, B.S.
AU  - Mitrović, Nebojša S.
AU  - Nikolić, Maria Vesna
AU  - Maricic, Aleksa M
AU  - Danninger, H
AU  - Aleksić, Obrad
AU  - Halwax, E
PY  - 2010
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/375
AB  - In this work, manganese zinc ferrite components were manufactured by powder injection molding-PIM technology. A fine powder consisting of Mn1-xZnxFe2O4 with small addition of hematite alpha-Fe2O3 as used in mass ferrite production was mixed with an organic binder (Solvent System) to form ferrite feedstock for powder injection molding-PIM technology. Excess of Fe2O3 was present in the starting powder in order to suppress conversion of Fe3+ to Fe2+ ions which would lower the permeability. The ferrite feedstock was injected in a mold with a cavity shaped like a small cylinder with a hole on the main axis. Injection molded samples were then solvent and thermally debinded and sintered in different atmospheres: air, argon and nitrogen. The starting powder, injected green samples and sintered samples were characterized using X-ray diffractometry, scanning electron microscopy, thermogravimetry, differential thermal analysis as well as by magnetic measurements. Rietveld refinement of measured X-ray patterns was done to detect possible phase transformations of Fe2O3 to other iron oxides through reduction by binder residues (carbon) at elevated temperatures during thermal debinding and sintering. Finally, the magnetic properties were measured by hysteresis graph and mutually compared for the injected samples that were sintered in air, argon and nitrogen. The obtained magnetic characteristics where found to be comparable with commercial samples prepared by traditional sintering technology.
PB  - Elsevier Science Bv, Amsterdam
T2  - Materials Science and Engineering B-Solid State Materials for Advanced Technology
T1  - Properties of MnZn ferrites prepared by powder injection molding technology
EP  - 222
IS  - 3
SP  - 217
VL  - 175
DO  - 10.1016/j.mseb.2010.07.031
ER  - 

@article{
author = "Zlatkov, B.S. and Mitrović, Nebojša S. and Nikolić, Maria Vesna and Maricic, Aleksa M and Danninger, H and Aleksić, Obrad and Halwax, E",
year = "2010",
abstract = "In this work, manganese zinc ferrite components were manufactured by powder injection molding-PIM technology. A fine powder consisting of Mn1-xZnxFe2O4 with small addition of hematite alpha-Fe2O3 as used in mass ferrite production was mixed with an organic binder (Solvent System) to form ferrite feedstock for powder injection molding-PIM technology. Excess of Fe2O3 was present in the starting powder in order to suppress conversion of Fe3+ to Fe2+ ions which would lower the permeability. The ferrite feedstock was injected in a mold with a cavity shaped like a small cylinder with a hole on the main axis. Injection molded samples were then solvent and thermally debinded and sintered in different atmospheres: air, argon and nitrogen. The starting powder, injected green samples and sintered samples were characterized using X-ray diffractometry, scanning electron microscopy, thermogravimetry, differential thermal analysis as well as by magnetic measurements. Rietveld refinement of measured X-ray patterns was done to detect possible phase transformations of Fe2O3 to other iron oxides through reduction by binder residues (carbon) at elevated temperatures during thermal debinding and sintering. Finally, the magnetic properties were measured by hysteresis graph and mutually compared for the injected samples that were sintered in air, argon and nitrogen. The obtained magnetic characteristics where found to be comparable with commercial samples prepared by traditional sintering technology.",
publisher = "Elsevier Science Bv, Amsterdam",
journal = "Materials Science and Engineering B-Solid State Materials for Advanced Technology",
title = "Properties of MnZn ferrites prepared by powder injection molding technology",
pages = "222-217",
number = "3",
volume = "175",
doi = "10.1016/j.mseb.2010.07.031"
}

Zlatkov, B.S., Mitrović, N. S., Nikolić, M. V., Maricic, A. M., Danninger, H., Aleksić, O.,& Halwax, E.. (2010). Properties of MnZn ferrites prepared by powder injection molding technology. in Materials Science and Engineering B-Solid State Materials for Advanced Technology
Elsevier Science Bv, Amsterdam., 175(3), 217-222.
https://doi.org/10.1016/j.mseb.2010.07.031

Zlatkov B, Mitrović NS, Nikolić MV, Maricic AM, Danninger H, Aleksić O, Halwax E. Properties of MnZn ferrites prepared by powder injection molding technology. in Materials Science and Engineering B-Solid State Materials for Advanced Technology. 2010;175(3):217-222.
doi:10.1016/j.mseb.2010.07.031 .

Zlatkov, B.S., Mitrović, Nebojša S., Nikolić, Maria Vesna, Maricic, Aleksa M, Danninger, H, Aleksić, Obrad, Halwax, E, "Properties of MnZn ferrites prepared by powder injection molding technology" in Materials Science and Engineering B-Solid State Materials for Advanced Technology, 175, no. 3 (2010):217-222,
https://doi.org/10.1016/j.mseb.2010.07.031 . .

TY  - JOUR
AU  - Obradović, Nina
AU  - Mitrić, Miodrag
AU  - Nikolić, Maria Vesna
AU  - Minic, Dragica
AU  - Mitrović, Nebojša S.
AU  - Ristic, Momcilo M.
PY  - 2009
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/366
AB  - Starting mixtures of ZnO, TiO(2) and MgO (0, 1.25 and 2.5 wt.% MgO) powders were mechanically activated for 15 min in a planetary ball mill. The powders obtained were sintered non-isothermally to temperatures between 800 and 1100 degrees C and then held at those temperatures for 120 min. Analysis of the influence of MgO addition on the synthesis of zinc-titanate ceramics showed that its addition increased slightly the temperature at which the reaction process started, accelerated the reaction and resulted in higher sample densities. These results were correlated with the results of structural characterization using X-ray powder diffraction method and SEM analysis. Also, the results of electric resistivity, capacitance and loss tangent of the sintered samples were obtained.
PB  - Elsevier Science Sa, Lausanne
T2  - Journal of Alloys and Compounds
T1  - Influence of MgO addition on the synthesis and electrical properties of sintered zinc-titanate ceramics
EP  - 277
IS  - 1-2
SP  - 272
VL  - 471
DO  - 10.1016/j.jallcom.2008.03.090
ER  - 

@article{
author = "Obradović, Nina and Mitrić, Miodrag and Nikolić, Maria Vesna and Minic, Dragica and Mitrović, Nebojša S. and Ristic, Momcilo M.",
year = "2009",
abstract = "Starting mixtures of ZnO, TiO(2) and MgO (0, 1.25 and 2.5 wt.% MgO) powders were mechanically activated for 15 min in a planetary ball mill. The powders obtained were sintered non-isothermally to temperatures between 800 and 1100 degrees C and then held at those temperatures for 120 min. Analysis of the influence of MgO addition on the synthesis of zinc-titanate ceramics showed that its addition increased slightly the temperature at which the reaction process started, accelerated the reaction and resulted in higher sample densities. These results were correlated with the results of structural characterization using X-ray powder diffraction method and SEM analysis. Also, the results of electric resistivity, capacitance and loss tangent of the sintered samples were obtained.",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Journal of Alloys and Compounds",
title = "Influence of MgO addition on the synthesis and electrical properties of sintered zinc-titanate ceramics",
pages = "277-272",
number = "1-2",
volume = "471",
doi = "10.1016/j.jallcom.2008.03.090"
}

Obradović, N., Mitrić, M., Nikolić, M. V., Minic, D., Mitrović, N. S.,& Ristic, M. M.. (2009). Influence of MgO addition on the synthesis and electrical properties of sintered zinc-titanate ceramics. in Journal of Alloys and Compounds
Elsevier Science Sa, Lausanne., 471(1-2), 272-277.
https://doi.org/10.1016/j.jallcom.2008.03.090

Obradović N, Mitrić M, Nikolić MV, Minic D, Mitrović NS, Ristic MM. Influence of MgO addition on the synthesis and electrical properties of sintered zinc-titanate ceramics. in Journal of Alloys and Compounds. 2009;471(1-2):272-277.
doi:10.1016/j.jallcom.2008.03.090 .

Obradović, Nina, Mitrić, Miodrag, Nikolić, Maria Vesna, Minic, Dragica, Mitrović, Nebojša S., Ristic, Momcilo M., "Influence of MgO addition on the synthesis and electrical properties of sintered zinc-titanate ceramics" in Journal of Alloys and Compounds, 471, no. 1-2 (2009):272-277,
https://doi.org/10.1016/j.jallcom.2008.03.090 . .