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  - 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  - Damnjanović, Mirjana S
AU  - Živanov, Ljiljana D
AU  - Djuric, Snežana M
AU  - Marić, Andrea M
AU  - Menicanin, Aleksandar
AU  - Radosavljević, Goran
AU  - Blaz, Nelu V.
PY  - 2012
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/505
AB  - Purpose - Significant achievements in ferrite material processing enable developments of many ferrite devices with a wide range of power levels and working frequencies, which make demands for new characterization and modelling methods for ferrite materials and components. The purpose of this paper is to introduce a modelling and measurement procedure, which can be used for the characterization of two-port ferrite components in high frequency range. Design/methodology/approach - This paper presents a commercially available ferrite component (transformer) modelling and determination of its electrical parameters using in-house developed software. The components are measured and characterized using a vector network analyzer E5071B and adaptation test fixture on PCB board. The parameters of electrical equivalent circuit of the ferrite transformer parameters are compared with values extracted out of measured scattering parameters. Findings - A good agreement between modelled and extracted electrical parameters of the ferrite transformer is found. The modelled inductance curves have the same dependence versus frequency as extracted ones. That confirms the model validity in the wide frequency range. Originality/value - In-house developed software based on proposed model provides inclusion of the ferrite material dispersive characteristics, which dominantly determines high-frequency behaviour of two-port ferrite components. Developed software enables fast and accurate calculation of the ferrite transformer electrical parameters and its redesign in order to achieve the best performance for required application.
PB  - Emerald Group Publishing Ltd, Bingley
T2  - Microelectronics International
T1  - Characterization and modelling of miniature ferrite transformer for high frequency applications
EP  - 89
IS  - 2
SP  - 83
VL  - 29
DO  - 10.1108/13565361211237671
ER  - 

@article{
author = "Damnjanović, Mirjana S and Živanov, Ljiljana D and Djuric, Snežana M and Marić, Andrea M and Menicanin, Aleksandar and Radosavljević, Goran and Blaz, Nelu V.",
year = "2012",
abstract = "Purpose - Significant achievements in ferrite material processing enable developments of many ferrite devices with a wide range of power levels and working frequencies, which make demands for new characterization and modelling methods for ferrite materials and components. The purpose of this paper is to introduce a modelling and measurement procedure, which can be used for the characterization of two-port ferrite components in high frequency range. Design/methodology/approach - This paper presents a commercially available ferrite component (transformer) modelling and determination of its electrical parameters using in-house developed software. The components are measured and characterized using a vector network analyzer E5071B and adaptation test fixture on PCB board. The parameters of electrical equivalent circuit of the ferrite transformer parameters are compared with values extracted out of measured scattering parameters. Findings - A good agreement between modelled and extracted electrical parameters of the ferrite transformer is found. The modelled inductance curves have the same dependence versus frequency as extracted ones. That confirms the model validity in the wide frequency range. Originality/value - In-house developed software based on proposed model provides inclusion of the ferrite material dispersive characteristics, which dominantly determines high-frequency behaviour of two-port ferrite components. Developed software enables fast and accurate calculation of the ferrite transformer electrical parameters and its redesign in order to achieve the best performance for required application.",
publisher = "Emerald Group Publishing Ltd, Bingley",
journal = "Microelectronics International",
title = "Characterization and modelling of miniature ferrite transformer for high frequency applications",
pages = "89-83",
number = "2",
volume = "29",
doi = "10.1108/13565361211237671"
}

Damnjanović, M. S., Živanov, L. D., Djuric, S. M., Marić, A. M., Menicanin, A., Radosavljević, G.,& Blaz, N. V.. (2012). Characterization and modelling of miniature ferrite transformer for high frequency applications. in Microelectronics International
Emerald Group Publishing Ltd, Bingley., 29(2), 83-89.
https://doi.org/10.1108/13565361211237671

Damnjanović MS, Živanov LD, Djuric SM, Marić AM, Menicanin A, Radosavljević G, Blaz NV. Characterization and modelling of miniature ferrite transformer for high frequency applications. in Microelectronics International. 2012;29(2):83-89.
doi:10.1108/13565361211237671 .

Damnjanović, Mirjana S, Živanov, Ljiljana D, Djuric, Snežana M, Marić, Andrea M, Menicanin, Aleksandar, Radosavljević, Goran, Blaz, Nelu V., "Characterization and modelling of miniature ferrite transformer for high frequency applications" in Microelectronics International, 29, no. 2 (2012):83-89,
https://doi.org/10.1108/13565361211237671 . .

TY  - CONF
AU  - Damnjanović, Mirjana S
AU  - Živanov, Ljiljana D
AU  - Radosavljević, Goran
AU  - Marić, Andrea
AU  - Menicanin, Aleksandar
PY  - 2010
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/3147
AB  - A characterization of ferrite transformers based on S-parameters measurement using vector network analyzer and specially developed PCB test fixture is presented. Ferrite transformers are realized with commercially available ferrite component. In addition, in order to verify the measurement procedure, we have tested the same component using impedance analyzer, and compared the results with VNA measurement procedure. It is shown that proposed approach is efficient in predicting and analyzing the transformer performance, even in high frequency range.
PB  - 14th International Power Electronics and Motion Control Conference, EPE-PEMC 2010
C3  - 14th International Power Electronics and Motion Control Conference, EPE-PEMC 2010
T1  - Parameter extraction of ferrite transformers using S-parameters
EP  - T8-36
SP  - T8-31
DO  - 10.1109/EPEPEMC.2010.5606650
ER  - 

@conference{
author = "Damnjanović, Mirjana S and Živanov, Ljiljana D and Radosavljević, Goran and Marić, Andrea and Menicanin, Aleksandar",
year = "2010",
abstract = "A characterization of ferrite transformers based on S-parameters measurement using vector network analyzer and specially developed PCB test fixture is presented. Ferrite transformers are realized with commercially available ferrite component. In addition, in order to verify the measurement procedure, we have tested the same component using impedance analyzer, and compared the results with VNA measurement procedure. It is shown that proposed approach is efficient in predicting and analyzing the transformer performance, even in high frequency range.",
publisher = "14th International Power Electronics and Motion Control Conference, EPE-PEMC 2010",
journal = "14th International Power Electronics and Motion Control Conference, EPE-PEMC 2010",
title = "Parameter extraction of ferrite transformers using S-parameters",
pages = "T8-36-T8-31",
doi = "10.1109/EPEPEMC.2010.5606650"
}

Damnjanović, M. S., Živanov, L. D., Radosavljević, G., Marić, A.,& Menicanin, A.. (2010). Parameter extraction of ferrite transformers using S-parameters. in 14th International Power Electronics and Motion Control Conference, EPE-PEMC 2010
14th International Power Electronics and Motion Control Conference, EPE-PEMC 2010., T8-31-T8-36.
https://doi.org/10.1109/EPEPEMC.2010.5606650

Damnjanović MS, Živanov LD, Radosavljević G, Marić A, Menicanin A. Parameter extraction of ferrite transformers using S-parameters. in 14th International Power Electronics and Motion Control Conference, EPE-PEMC 2010. 2010;:T8-31-T8-36.
doi:10.1109/EPEPEMC.2010.5606650 .

Damnjanović, Mirjana S, Živanov, Ljiljana D, Radosavljević, Goran, Marić, Andrea, Menicanin, Aleksandar, "Parameter extraction of ferrite transformers using S-parameters" in 14th International Power Electronics and Motion Control Conference, EPE-PEMC 2010 (2010):T8-31-T8-36,
https://doi.org/10.1109/EPEPEMC.2010.5606650 . .

TY  - CONF
AU  - Damnjanović, M.S.
AU  - Živanov, Ljiljana D
AU  - Marić, Andrea M
AU  - Radosavljević, Goran
AU  - Menicanin, Aleksandar
AU  - Blaz, Nelu V.
AU  - Djurić, S.M.
PY  - 2010
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/397
AB  - In this paper, characterization of ferrite surface mount bead based on S-parameters measurement, using vector network analyzer E5071B and specially developed PCB test fixture, are presented. The validation of characterization method was performed using commercially available ferrite component, the surface mount 4-way bead. It is shown that proposed approach is efficient in predicting and analyzing the ferrite bead performance, not only in standard frequency range bellow 100 MHz, but also in high frequency range up to 1GHz.
C3  - SIISY 2010 - 8th IEEE International Symposium on Intelligent Systems and Informatics
T1  - Characterization of ferrite surface mount bead using S-parameters
EP  - 360
SP  - 357
DO  - 10.1109/SISY.2010.5647408
ER  - 

@conference{
author = "Damnjanović, M.S. and Živanov, Ljiljana D and Marić, Andrea M and Radosavljević, Goran and Menicanin, Aleksandar and Blaz, Nelu V. and Djurić, S.M.",
year = "2010",
abstract = "In this paper, characterization of ferrite surface mount bead based on S-parameters measurement, using vector network analyzer E5071B and specially developed PCB test fixture, are presented. The validation of characterization method was performed using commercially available ferrite component, the surface mount 4-way bead. It is shown that proposed approach is efficient in predicting and analyzing the ferrite bead performance, not only in standard frequency range bellow 100 MHz, but also in high frequency range up to 1GHz.",
journal = "SIISY 2010 - 8th IEEE International Symposium on Intelligent Systems and Informatics",
title = "Characterization of ferrite surface mount bead using S-parameters",
pages = "360-357",
doi = "10.1109/SISY.2010.5647408"
}

Damnjanović, M.S., Živanov, L. D., Marić, A. M., Radosavljević, G., Menicanin, A., Blaz, N. V.,& Djurić, S.M.. (2010). Characterization of ferrite surface mount bead using S-parameters. in SIISY 2010 - 8th IEEE International Symposium on Intelligent Systems and Informatics, 357-360.
https://doi.org/10.1109/SISY.2010.5647408

Damnjanović M, Živanov LD, Marić AM, Radosavljević G, Menicanin A, Blaz NV, Djurić S. Characterization of ferrite surface mount bead using S-parameters. in SIISY 2010 - 8th IEEE International Symposium on Intelligent Systems and Informatics. 2010;:357-360.
doi:10.1109/SISY.2010.5647408 .

Damnjanović, M.S., Živanov, Ljiljana D, Marić, Andrea M, Radosavljević, Goran, Menicanin, Aleksandar, Blaz, Nelu V., Djurić, S.M., "Characterization of ferrite surface mount bead using S-parameters" in SIISY 2010 - 8th IEEE International Symposium on Intelligent Systems and Informatics (2010):357-360,
https://doi.org/10.1109/SISY.2010.5647408 . .