TY  - JOUR
AU  - Egelja, Adela
AU  - Pašalić, Snežana
AU  - Dodevski, Vladimir
AU  - Kragović, Milan M.
AU  - Stojković-Simatović, Ivana
AU  - Radovanović, Željko
AU  - Stojmenović, Marija
PY  - 2018
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3898
AB  - Alumina/YAG composites (AYX_t) with high relative density (99.2 %TD) were successfully obtained by mixing commercial alumina powder with different volume fractions of yttrium aluminium garnet (Y3Al5O12-YAG; 7, 14, 21 and 28). YAG was synthetized by nitrate glycine reaction in the form of precursor powder. Polycrystalline YAG powder was obtained by calcination at 950 degrees C for 2 h. Additionally, obtained compositions were characterized by XRD, SEM, EDX and electrochemical impedance spectroscopy. By XRPD analysis was found that the particle size of YAG powders lies in the nanometric range (being lower than 35 nm). By SEM microphotographs of composites were confirmed the formation of a conductive path consisting from mutually interconnected YAG particles. This was confirmed by the electrochemical impedance spectroscopy. The highest electrical conductivity of grain (K-g) and grain boundary (K-gb) at 700 degrees C amounted to 2.22x10(-2) ohm(-1)cm(-1) and 9.44x10(-3) ohm(-1) cm(-1), respectively, was measured in the composite containing 21 vol% of YAG.
PB  - Međunarodni Institut za nauku o sinterovanju, Beograd
T2  - Science of Sintering
T1  - Structural, Morphological and Electrical Properties of Alumina/YAG Composites as Solid Electrolyte for IT - SOFC
EP  - 369
IS  - 3
SP  - 357
VL  - 50
DO  - 10.2298/SOS1803357E
ER  - 

@article{
author = "Egelja, Adela and Pašalić, Snežana and Dodevski, Vladimir and Kragović, Milan M. and Stojković-Simatović, Ivana and Radovanović, Željko and Stojmenović, Marija",
year = "2018",
abstract = "Alumina/YAG composites (AYX_t) with high relative density (99.2 %TD) were successfully obtained by mixing commercial alumina powder with different volume fractions of yttrium aluminium garnet (Y3Al5O12-YAG; 7, 14, 21 and 28). YAG was synthetized by nitrate glycine reaction in the form of precursor powder. Polycrystalline YAG powder was obtained by calcination at 950 degrees C for 2 h. Additionally, obtained compositions were characterized by XRD, SEM, EDX and electrochemical impedance spectroscopy. By XRPD analysis was found that the particle size of YAG powders lies in the nanometric range (being lower than 35 nm). By SEM microphotographs of composites were confirmed the formation of a conductive path consisting from mutually interconnected YAG particles. This was confirmed by the electrochemical impedance spectroscopy. The highest electrical conductivity of grain (K-g) and grain boundary (K-gb) at 700 degrees C amounted to 2.22x10(-2) ohm(-1)cm(-1) and 9.44x10(-3) ohm(-1) cm(-1), respectively, was measured in the composite containing 21 vol% of YAG.",
publisher = "Međunarodni Institut za nauku o sinterovanju, Beograd",
journal = "Science of Sintering",
title = "Structural, Morphological and Electrical Properties of Alumina/YAG Composites as Solid Electrolyte for IT - SOFC",
pages = "369-357",
number = "3",
volume = "50",
doi = "10.2298/SOS1803357E"
}

Egelja, A., Pašalić, S., Dodevski, V., Kragović, M. M., Stojković-Simatović, I., Radovanović, Ž.,& Stojmenović, M.. (2018). Structural, Morphological and Electrical Properties of Alumina/YAG Composites as Solid Electrolyte for IT - SOFC. in Science of Sintering
Međunarodni Institut za nauku o sinterovanju, Beograd., 50(3), 357-369.
https://doi.org/10.2298/SOS1803357E

Egelja A, Pašalić S, Dodevski V, Kragović MM, Stojković-Simatović I, Radovanović Ž, Stojmenović M. Structural, Morphological and Electrical Properties of Alumina/YAG Composites as Solid Electrolyte for IT - SOFC. in Science of Sintering. 2018;50(3):357-369.
doi:10.2298/SOS1803357E .

Egelja, Adela, Pašalić, Snežana, Dodevski, Vladimir, Kragović, Milan M., Stojković-Simatović, Ivana, Radovanović, Željko, Stojmenović, Marija, "Structural, Morphological and Electrical Properties of Alumina/YAG Composites as Solid Electrolyte for IT - SOFC" in Science of Sintering, 50, no. 3 (2018):357-369,
https://doi.org/10.2298/SOS1803357E . .

TY  - JOUR
AU  - Jokanović, Vukoman
AU  - Dramićanin, Miroslav
AU  - Andrić, Z.
AU  - Dramićanin, Tatjana
AU  - Plavšić, Milenko B.
AU  - Pašalić, Snežana
AU  - Miljković, Miroslav
PY  - 2008
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1321
AB  - A new approach to the two-level design and self-assembling of MexSiOy (Me = Gd, Y and Ca or their mixtures) nano-powders from SiO2 sols is described. The nanostructure design of various optical active materials based on different compounds of Me(x)Sio(y) is discussed. These particles were formed by the combination of hydrothermal synthesis and ultrasound spray pyrolysis. The morphology and structural design of the particles and sub-particles are defined by their synthesis procedure and processing parameters. The mean particle size and size distribution of all the MexSiOy based compounds were determined by SEM analysis. These results were compared with the particle diameter evaluated from the theoretical model of the breaking-up of capillary waves. For all the synthesized powders, the obtained results indicate the possibility of a rigorous design of the structure of the particles throughout their entire hierarchy.
PB  - Elsevier, Amsterdam
T2  - Optical Materials
T1  - Nanostructure designed powders of optical active materials MexSiOy obtained by ultrasonic spray pyrolysis
EP  - 1172
IS  - 7
SP  - 1168
VL  - 30
DO  - 10.1016/j.optmat.2007.05.043
ER  - 

@article{
author = "Jokanović, Vukoman and Dramićanin, Miroslav and Andrić, Z. and Dramićanin, Tatjana and Plavšić, Milenko B. and Pašalić, Snežana and Miljković, Miroslav",
year = "2008",
abstract = "A new approach to the two-level design and self-assembling of MexSiOy (Me = Gd, Y and Ca or their mixtures) nano-powders from SiO2 sols is described. The nanostructure design of various optical active materials based on different compounds of Me(x)Sio(y) is discussed. These particles were formed by the combination of hydrothermal synthesis and ultrasound spray pyrolysis. The morphology and structural design of the particles and sub-particles are defined by their synthesis procedure and processing parameters. The mean particle size and size distribution of all the MexSiOy based compounds were determined by SEM analysis. These results were compared with the particle diameter evaluated from the theoretical model of the breaking-up of capillary waves. For all the synthesized powders, the obtained results indicate the possibility of a rigorous design of the structure of the particles throughout their entire hierarchy.",
publisher = "Elsevier, Amsterdam",
journal = "Optical Materials",
title = "Nanostructure designed powders of optical active materials MexSiOy obtained by ultrasonic spray pyrolysis",
pages = "1172-1168",
number = "7",
volume = "30",
doi = "10.1016/j.optmat.2007.05.043"
}

Jokanović, V., Dramićanin, M., Andrić, Z., Dramićanin, T., Plavšić, M. B., Pašalić, S.,& Miljković, M.. (2008). Nanostructure designed powders of optical active materials MexSiOy obtained by ultrasonic spray pyrolysis. in Optical Materials
Elsevier, Amsterdam., 30(7), 1168-1172.
https://doi.org/10.1016/j.optmat.2007.05.043

Jokanović V, Dramićanin M, Andrić Z, Dramićanin T, Plavšić MB, Pašalić S, Miljković M. Nanostructure designed powders of optical active materials MexSiOy obtained by ultrasonic spray pyrolysis. in Optical Materials. 2008;30(7):1168-1172.
doi:10.1016/j.optmat.2007.05.043 .

Jokanović, Vukoman, Dramićanin, Miroslav, Andrić, Z., Dramićanin, Tatjana, Plavšić, Milenko B., Pašalić, Snežana, Miljković, Miroslav, "Nanostructure designed powders of optical active materials MexSiOy obtained by ultrasonic spray pyrolysis" in Optical Materials, 30, no. 7 (2008):1168-1172,
https://doi.org/10.1016/j.optmat.2007.05.043 . .

TY  - JOUR
AU  - Pašalić, Snežana
AU  - Jovanić, Predrag
AU  - Bugarski, Branko
PY  - 2007
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1015
AB  - There are many developed strategies for evaluating emulsion stability, aimed at determining the life circle of emulsions. Most of them are based on rheological properties of emulsions. There are, however, very few based on direct emulsion observations. In this paper we present a developed method for the emulsion stability evaluation by direct observation of optical emulsion properties. We propose the fractal dimension approach as a stability quantification measure, The method is based on the measure of emulsion transmittance properties, which are directly dependent on the emulsion stability at the moment of measurement. The oil in water emulsion was used as a test emulsion. The system is classified as stable emulsion and our intention was to find the moment when it starts to break. Emulsion transmittance properties were measure applying a system for acquisition of visual information, which is based on a CCD camera and a fast PC configuration equipped with the capturing software. The acquired sets of visual information were analyzed by the OZARIA software package. The fractal dimensions were determined by the box counting method. For these experiments, 100 boxes of different sizes were used. Experimental emulsions were measured after 7, 14, 21 and 28 days from the moment of creation. A slight increase in fractal dimensions was observed, which indicates that the emulsions are still in the stable region, or from the fractal point of view emulsion are still regular and no significant irregularities were observed. From the first experiments the applied methodology proved to be sensitive enough to be used for emulsions stability evaluation.
PB  - 8th Conference of the Yugoslav Materials Research Society
T2  - Materials Science Forum
T1  - Emulsion stability evaluation using fractal dimensions approach
EP  - 182
SP  - 177
VL  - 555
DO  - 10.4028/0-87849-441-3.177
ER  - 

@article{
author = "Pašalić, Snežana and Jovanić, Predrag and Bugarski, Branko",
year = "2007",
abstract = "There are many developed strategies for evaluating emulsion stability, aimed at determining the life circle of emulsions. Most of them are based on rheological properties of emulsions. There are, however, very few based on direct emulsion observations. In this paper we present a developed method for the emulsion stability evaluation by direct observation of optical emulsion properties. We propose the fractal dimension approach as a stability quantification measure, The method is based on the measure of emulsion transmittance properties, which are directly dependent on the emulsion stability at the moment of measurement. The oil in water emulsion was used as a test emulsion. The system is classified as stable emulsion and our intention was to find the moment when it starts to break. Emulsion transmittance properties were measure applying a system for acquisition of visual information, which is based on a CCD camera and a fast PC configuration equipped with the capturing software. The acquired sets of visual information were analyzed by the OZARIA software package. The fractal dimensions were determined by the box counting method. For these experiments, 100 boxes of different sizes were used. Experimental emulsions were measured after 7, 14, 21 and 28 days from the moment of creation. A slight increase in fractal dimensions was observed, which indicates that the emulsions are still in the stable region, or from the fractal point of view emulsion are still regular and no significant irregularities were observed. From the first experiments the applied methodology proved to be sensitive enough to be used for emulsions stability evaluation.",
publisher = "8th Conference of the Yugoslav Materials Research Society",
journal = "Materials Science Forum",
title = "Emulsion stability evaluation using fractal dimensions approach",
pages = "182-177",
volume = "555",
doi = "10.4028/0-87849-441-3.177"
}

Pašalić, S., Jovanić, P.,& Bugarski, B.. (2007). Emulsion stability evaluation using fractal dimensions approach. in Materials Science Forum
8th Conference of the Yugoslav Materials Research Society., 555, 177-182.
https://doi.org/10.4028/0-87849-441-3.177

Pašalić S, Jovanić P, Bugarski B. Emulsion stability evaluation using fractal dimensions approach. in Materials Science Forum. 2007;555:177-182.
doi:10.4028/0-87849-441-3.177 .

Pašalić, Snežana, Jovanić, Predrag, Bugarski, Branko, "Emulsion stability evaluation using fractal dimensions approach" in Materials Science Forum, 555 (2007):177-182,
https://doi.org/10.4028/0-87849-441-3.177 . .