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  - 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  - CONF
AU  - Luković, Miloljub
AU  - Nikolić, Maria Vesna
AU  - Radojcic, Branka M
AU  - Aleksić, Obrad
PY  - 2013
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/647
AB  - NTC thick film segmented thermistors were realized by screen printing of a low resistivity paste and conductive PdAg paste printed for electrodes. Two thick film thermistors as thermal sensors were placed in plastic tube housing connected to the water mains to form a calorimetric type of flow-meter, e.g. to measure the input water temperature and the thermistor self-heating temperature. Range constant voltage (RCV) was applied for self-heating thermistor power supply in different ranges of input water temperature. Modeling of the heat loss in the flow-meter for water was derived from heat balance equations for a self-heated thermistor in static water and in water flow conditions (static and dynamic thermistor temperature). Both temperatures (static and dynamic) were related to self-heating currents. The input water temperature was measured independently by a cold thermistor. Other parameters such as water thermal conductivity, thermistor exponential factor B and nominal thermistor resistance at room temperature were included in the thermistor heat balance equations. The logarithmic behavior of self-heating thermistors in the water flow enable modeling of heat loss as a function of static and dynamic currents related to static and dynamic thermistor temperatures. The model achieved was used in the fitting procedure of measured data of the flow-meter response.
PB  - Trans Tech Publications Ltd, Durnten-Zurich
C3  - Materials and Applications for Sensors and Transducers Ii
T1  - Modeling of the heat loss in a thermal sensor for water made of NTC thick film segmented thermistors
EP  - +
SP  - 334
VL  - 543
DO  - 10.4028/www.scientific.net/KEM.543.334
ER  - 

@conference{
author = "Luković, Miloljub and Nikolić, Maria Vesna and Radojcic, Branka M and Aleksić, Obrad",
year = "2013",
abstract = "NTC thick film segmented thermistors were realized by screen printing of a low resistivity paste and conductive PdAg paste printed for electrodes. Two thick film thermistors as thermal sensors were placed in plastic tube housing connected to the water mains to form a calorimetric type of flow-meter, e.g. to measure the input water temperature and the thermistor self-heating temperature. Range constant voltage (RCV) was applied for self-heating thermistor power supply in different ranges of input water temperature. Modeling of the heat loss in the flow-meter for water was derived from heat balance equations for a self-heated thermistor in static water and in water flow conditions (static and dynamic thermistor temperature). Both temperatures (static and dynamic) were related to self-heating currents. The input water temperature was measured independently by a cold thermistor. Other parameters such as water thermal conductivity, thermistor exponential factor B and nominal thermistor resistance at room temperature were included in the thermistor heat balance equations. The logarithmic behavior of self-heating thermistors in the water flow enable modeling of heat loss as a function of static and dynamic currents related to static and dynamic thermistor temperatures. The model achieved was used in the fitting procedure of measured data of the flow-meter response.",
publisher = "Trans Tech Publications Ltd, Durnten-Zurich",
journal = "Materials and Applications for Sensors and Transducers Ii",
title = "Modeling of the heat loss in a thermal sensor for water made of NTC thick film segmented thermistors",
pages = "+-334",
volume = "543",
doi = "10.4028/www.scientific.net/KEM.543.334"
}

Luković, M., Nikolić, M. V., Radojcic, B. M.,& Aleksić, O.. (2013). Modeling of the heat loss in a thermal sensor for water made of NTC thick film segmented thermistors. in Materials and Applications for Sensors and Transducers Ii
Trans Tech Publications Ltd, Durnten-Zurich., 543, 334-+.
https://doi.org/10.4028/www.scientific.net/KEM.543.334

Luković M, Nikolić MV, Radojcic BM, Aleksić O. Modeling of the heat loss in a thermal sensor for water made of NTC thick film segmented thermistors. in Materials and Applications for Sensors and Transducers Ii. 2013;543:334-+.
doi:10.4028/www.scientific.net/KEM.543.334 .

Luković, Miloljub, Nikolić, Maria Vesna, Radojcic, Branka M, Aleksić, Obrad, "Modeling of the heat loss in a thermal sensor for water made of NTC thick film segmented thermistors" in Materials and Applications for Sensors and Transducers Ii, 543 (2013):334-+,
https://doi.org/10.4028/www.scientific.net/KEM.543.334 . .

TY  - JOUR
AU  - Nikolić, Maria Vesna
AU  - Radojcic, Branka M
AU  - Aleksić, Obrad
AU  - Luković, Miloljub
AU  - Nikolić, Pantelija M.
PY  - 2011
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/470
AB  - A simple thermal (heat loss) sensor system was designed in a small plastic tube housing using a negative thermal coefficient (NTC) thick-film thermistor as a self-heating sensor. The voltage power supply [range constant voltage (RCV)-range constant voltage] uses the measured input water temperature to select the applied voltage in steps (up and down) in order to enable operation of the sensor at optimal sensitivity for different water temperatures. The input water temperature was measured using a "cold" NTC thick-film segmented thermistor. The measured calibration curves were modeled. Additional calculated curves were interpolated between the experimental curves in fine steps to cover each temperature of input water and can be used for determining the water volume flow rate or water velocity. The realized prototype flow meter inertia, stability, repeatability, and tolerance were measured and analyzed. The proposed intelligent RCV thermal flow meter system will include a smart power supply with range-constant-voltages (auto-range), a simple acquisition card and custom designed flow meter software.
PB  - IEEE-Inst Electrical Electronics Engineers Inc, Piscataway
T2  - IEEE Sensors Journal
T1  - A Thermal Sensor for Water Using Self-Heated NTC Thick-Film Segmented Thermistors
EP  - 1645
IS  - 8
SP  - 1640
VL  - 11
DO  - 10.1109/JSEN.2010.2103309
ER  - 

@article{
author = "Nikolić, Maria Vesna and Radojcic, Branka M and Aleksić, Obrad and Luković, Miloljub and Nikolić, Pantelija M.",
year = "2011",
abstract = "A simple thermal (heat loss) sensor system was designed in a small plastic tube housing using a negative thermal coefficient (NTC) thick-film thermistor as a self-heating sensor. The voltage power supply [range constant voltage (RCV)-range constant voltage] uses the measured input water temperature to select the applied voltage in steps (up and down) in order to enable operation of the sensor at optimal sensitivity for different water temperatures. The input water temperature was measured using a "cold" NTC thick-film segmented thermistor. The measured calibration curves were modeled. Additional calculated curves were interpolated between the experimental curves in fine steps to cover each temperature of input water and can be used for determining the water volume flow rate or water velocity. The realized prototype flow meter inertia, stability, repeatability, and tolerance were measured and analyzed. The proposed intelligent RCV thermal flow meter system will include a smart power supply with range-constant-voltages (auto-range), a simple acquisition card and custom designed flow meter software.",
publisher = "IEEE-Inst Electrical Electronics Engineers Inc, Piscataway",
journal = "IEEE Sensors Journal",
title = "A Thermal Sensor for Water Using Self-Heated NTC Thick-Film Segmented Thermistors",
pages = "1645-1640",
number = "8",
volume = "11",
doi = "10.1109/JSEN.2010.2103309"
}

Nikolić, M. V., Radojcic, B. M., Aleksić, O., Luković, M.,& Nikolić, P. M.. (2011). A Thermal Sensor for Water Using Self-Heated NTC Thick-Film Segmented Thermistors. in IEEE Sensors Journal
IEEE-Inst Electrical Electronics Engineers Inc, Piscataway., 11(8), 1640-1645.
https://doi.org/10.1109/JSEN.2010.2103309

Nikolić MV, Radojcic BM, Aleksić O, Luković M, Nikolić PM. A Thermal Sensor for Water Using Self-Heated NTC Thick-Film Segmented Thermistors. in IEEE Sensors Journal. 2011;11(8):1640-1645.
doi:10.1109/JSEN.2010.2103309 .

Nikolić, Maria Vesna, Radojcic, Branka M, Aleksić, Obrad, Luković, Miloljub, Nikolić, Pantelija M., "A Thermal Sensor for Water Using Self-Heated NTC Thick-Film Segmented Thermistors" in IEEE Sensors Journal, 11, no. 8 (2011):1640-1645,
https://doi.org/10.1109/JSEN.2010.2103309 . .

TY  - CONF
AU  - Menicanin, Aleksandar
AU  - Aleksić, Obrad
AU  - Nikolić, Maria Vesna
AU  - Savić, Slavica M.
AU  - Radojcic, Branka M
PY  - 2008
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/255
AB  - A novel uniaxial anemometer was created using a NTC thick film segmented therinistor to measure wind speed and direction. The anemometer operated on the principle of heat loss caused by the air volume flow and air speed. A NTC segmented thermistor served as a wind sensor in the anemometer. It was self-heated by a DC constant voltage. The self-heated DC current through the thermistor was changed by heat loss due to resistivity changes. The wind speed was varied from I to 15 m/s for different input air temperatures in the range of -20 to +40'degrees C. The wind direction was determined by measuring voltage differences on the inner electrodes of the NTC segmented thermistor. The air temperature was measure by a cold NTC thick film segmented thermistor calibrated in the claim chamber. Anemometar inertia was measured at room temperature (at 25 degrees C) and normal room humidity (at 50%). The results obtained enable fast optimization and implementation of a uniaxial anemometer in a 3D anemometer.
PB  - IEEE, New York
C3  - 2008 26th International Conference on Microelectronics, Vols 1 and 2, Proceedings
T1  - Novel uniaxial anemometer containing NTC thick film segmented thermistors
SP  - 349
DO  - 10.1109/ICMEL.2008.4559293
ER  - 

@conference{
author = "Menicanin, Aleksandar and Aleksić, Obrad and Nikolić, Maria Vesna and Savić, Slavica M. and Radojcic, Branka M",
year = "2008",
abstract = "A novel uniaxial anemometer was created using a NTC thick film segmented therinistor to measure wind speed and direction. The anemometer operated on the principle of heat loss caused by the air volume flow and air speed. A NTC segmented thermistor served as a wind sensor in the anemometer. It was self-heated by a DC constant voltage. The self-heated DC current through the thermistor was changed by heat loss due to resistivity changes. The wind speed was varied from I to 15 m/s for different input air temperatures in the range of -20 to +40'degrees C. The wind direction was determined by measuring voltage differences on the inner electrodes of the NTC segmented thermistor. The air temperature was measure by a cold NTC thick film segmented thermistor calibrated in the claim chamber. Anemometar inertia was measured at room temperature (at 25 degrees C) and normal room humidity (at 50%). The results obtained enable fast optimization and implementation of a uniaxial anemometer in a 3D anemometer.",
publisher = "IEEE, New York",
journal = "2008 26th International Conference on Microelectronics, Vols 1 and 2, Proceedings",
title = "Novel uniaxial anemometer containing NTC thick film segmented thermistors",
pages = "349",
doi = "10.1109/ICMEL.2008.4559293"
}

Menicanin, A., Aleksić, O., Nikolić, M. V., Savić, S. M.,& Radojcic, B. M.. (2008). Novel uniaxial anemometer containing NTC thick film segmented thermistors. in 2008 26th International Conference on Microelectronics, Vols 1 and 2, Proceedings
IEEE, New York., 349.
https://doi.org/10.1109/ICMEL.2008.4559293

Menicanin A, Aleksić O, Nikolić MV, Savić SM, Radojcic BM. Novel uniaxial anemometer containing NTC thick film segmented thermistors. in 2008 26th International Conference on Microelectronics, Vols 1 and 2, Proceedings. 2008;:349.
doi:10.1109/ICMEL.2008.4559293 .

Menicanin, Aleksandar, Aleksić, Obrad, Nikolić, Maria Vesna, Savić, Slavica M., Radojcic, Branka M, "Novel uniaxial anemometer containing NTC thick film segmented thermistors" in 2008 26th International Conference on Microelectronics, Vols 1 and 2, Proceedings (2008):349,
https://doi.org/10.1109/ICMEL.2008.4559293 . .