TY  - JOUR
AU  - Peles, A.
AU  - Aleksić, O.
AU  - Pavlović, Vera P.
AU  - Djoković, Vladimir
AU  - Dojčilović, Radovan
AU  - Nikolić, Z.
AU  - Marinković, F.
AU  - Mitrić, M.
AU  - Blagojević, Vladimir A.
AU  - Vlahović, Branislav
AU  - Pavlović, Vladimir
PY  - 2018
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/4658
AB  - The influence of the mechanical activation of ZnO nanoparticle fillers on the structural and electrical properties of the matrix of poly(vinylidenefluoride)-ZnO (PVDF-ZnO) films was investigated. Transmission electron microscopy and scanning electron microscopy analyses showed that mechanical activation in a high energy planetary ball mill reduces the size of ZnO particles. X-ray diffraction and Raman spectroscopy revealed that PVDF crystallized predominantly as the gamma-phase. Non-activated ZnO filler reduces the degree of the crystallinity of the matrix and promotes crystallization of alpha-phase of PVDF in the film, while the fillers activated for 5 and 10 min induce crystallization of beta-phase, indicating that mechanical activation of the filler can be used as a general method for fabrication of PVDF composites with increased content of piezoelectric beta-phase crystals. Dielectric spectroscopy measurements show that polymer composite with the high content of beta-phase (with ZnO filler activated for 5 min) exhibits the highest value of dielectric permittivity in 150-400 K range of temperatures. Kinetic analysis shows combined effects of increased surface area and increased concentration of surface defects on the interactions between polymer chains and activated nanoparticles.
PB  - IOP Publishing Ltd, Bristol
T2  - Physica Scripta
T1  - Structural and electrical properties of ferroelectric poly(vinylidene fluoride) and mechanically activated ZnO nanoparticle composite films
IS  - 10
VL  - 93
DO  - 10.1088/1402-4896/aad749
ER  - 

@article{
author = "Peles, A. and Aleksić, O. and Pavlović, Vera P. and Djoković, Vladimir and Dojčilović, Radovan and Nikolić, Z. and Marinković, F. and Mitrić, M. and Blagojević, Vladimir A. and Vlahović, Branislav and Pavlović, Vladimir",
year = "2018",
abstract = "The influence of the mechanical activation of ZnO nanoparticle fillers on the structural and electrical properties of the matrix of poly(vinylidenefluoride)-ZnO (PVDF-ZnO) films was investigated. Transmission electron microscopy and scanning electron microscopy analyses showed that mechanical activation in a high energy planetary ball mill reduces the size of ZnO particles. X-ray diffraction and Raman spectroscopy revealed that PVDF crystallized predominantly as the gamma-phase. Non-activated ZnO filler reduces the degree of the crystallinity of the matrix and promotes crystallization of alpha-phase of PVDF in the film, while the fillers activated for 5 and 10 min induce crystallization of beta-phase, indicating that mechanical activation of the filler can be used as a general method for fabrication of PVDF composites with increased content of piezoelectric beta-phase crystals. Dielectric spectroscopy measurements show that polymer composite with the high content of beta-phase (with ZnO filler activated for 5 min) exhibits the highest value of dielectric permittivity in 150-400 K range of temperatures. Kinetic analysis shows combined effects of increased surface area and increased concentration of surface defects on the interactions between polymer chains and activated nanoparticles.",
publisher = "IOP Publishing Ltd, Bristol",
journal = "Physica Scripta",
title = "Structural and electrical properties of ferroelectric poly(vinylidene fluoride) and mechanically activated ZnO nanoparticle composite films",
number = "10",
volume = "93",
doi = "10.1088/1402-4896/aad749"
}

Peles, A., Aleksić, O., Pavlović, V. P., Djoković, V., Dojčilović, R., Nikolić, Z., Marinković, F., Mitrić, M., Blagojević, V. A., Vlahović, B.,& Pavlović, V.. (2018). Structural and electrical properties of ferroelectric poly(vinylidene fluoride) and mechanically activated ZnO nanoparticle composite films. in Physica Scripta
IOP Publishing Ltd, Bristol., 93(10).
https://doi.org/10.1088/1402-4896/aad749

Peles A, Aleksić O, Pavlović VP, Djoković V, Dojčilović R, Nikolić Z, Marinković F, Mitrić M, Blagojević VA, Vlahović B, Pavlović V. Structural and electrical properties of ferroelectric poly(vinylidene fluoride) and mechanically activated ZnO nanoparticle composite films. in Physica Scripta. 2018;93(10).
doi:10.1088/1402-4896/aad749 .

Peles, A., Aleksić, O., Pavlović, Vera P., Djoković, Vladimir, Dojčilović, Radovan, Nikolić, Z., Marinković, F., Mitrić, M., Blagojević, Vladimir A., Vlahović, Branislav, Pavlović, Vladimir, "Structural and electrical properties of ferroelectric poly(vinylidene fluoride) and mechanically activated ZnO nanoparticle composite films" in Physica Scripta, 93, no. 10 (2018),
https://doi.org/10.1088/1402-4896/aad749 . .

TY  - JOUR
AU  - Filipović, Suzana
AU  - Obradović, N.
AU  - Pavlović, Vladimir
AU  - Marković, S.
AU  - Mitrić, M.
AU  - Ristić, M.M.
PY  - 2010
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/2352
AB  - Mixtures of MgO-TiO2 were mechanically activated using high-energy planetary ball mill during 5, 10, 20, 40, 80 and 120 minutes. Sintering process was preformed in air at 1100°-1400°C for 2h. The decrease in powder's particle size was noticed as the time of mechanical activation increased and confirmed by particle size analyzer. XRD analyses were performed in order to acquire the information about phase composition. Different ratio mixtures of MgTiO3 and Mg2TiO4 are present within all sintered samples. The effect of tribophysical activation on microstructure was investigated by scanning electron microscopy. The differential thermal gravimetric analysis has been performed in order to investigate thermal behaviour of the mixtures.
AB  - Smeše MgO-TiO2 su mehanički aktivirane u visoko-energetskom planetarnom mlinu tokom 5, 10, 20, 40, 80 i 120 minuta. Fazni sastav je određen rendgenskom difrakcijom. Sa porastom vremena mlevenja, primećeno je smanjenje veličine čestica praha. Takođe, ispitan je i efekat tribofizičke aktivacije na mikrostrukturu praha metodom skenirajuće elektronske mikroskopije. Radi ispitivanja termičkih svojstava praha, urađena je diferencijalna termijska analiza. Proces sinterovanja izveden je u vazduhu u temperaturnom opsegu od 1100°-1400°C tokom 2 sata. U svim sinterovanim uzorcima uočeno je prisustvo dve faze MgTiO3 i Mg2TiO4 ali njihov međusobni odnos koncentracija varira u odnosu na temperaturu sinterovanja.
PB  - Međunarodni Institut za nauku o sinterovanju, Beograd
T2  - Science of Sintering
T1  - Influence of mechanical activation on microstructure and crystal structure of sintered MgO-TiO2 system
EP  - 151
IS  - 2
SP  - 143
VL  - 42
DO  - 10.2298/SOS100518002F
ER  - 

@article{
author = "Filipović, Suzana and Obradović, N. and Pavlović, Vladimir and Marković, S. and Mitrić, M. and Ristić, M.M.",
year = "2010",
abstract = "Mixtures of MgO-TiO2 were mechanically activated using high-energy planetary ball mill during 5, 10, 20, 40, 80 and 120 minutes. Sintering process was preformed in air at 1100°-1400°C for 2h. The decrease in powder's particle size was noticed as the time of mechanical activation increased and confirmed by particle size analyzer. XRD analyses were performed in order to acquire the information about phase composition. Different ratio mixtures of MgTiO3 and Mg2TiO4 are present within all sintered samples. The effect of tribophysical activation on microstructure was investigated by scanning electron microscopy. The differential thermal gravimetric analysis has been performed in order to investigate thermal behaviour of the mixtures., Smeše MgO-TiO2 su mehanički aktivirane u visoko-energetskom planetarnom mlinu tokom 5, 10, 20, 40, 80 i 120 minuta. Fazni sastav je određen rendgenskom difrakcijom. Sa porastom vremena mlevenja, primećeno je smanjenje veličine čestica praha. Takođe, ispitan je i efekat tribofizičke aktivacije na mikrostrukturu praha metodom skenirajuće elektronske mikroskopije. Radi ispitivanja termičkih svojstava praha, urađena je diferencijalna termijska analiza. Proces sinterovanja izveden je u vazduhu u temperaturnom opsegu od 1100°-1400°C tokom 2 sata. U svim sinterovanim uzorcima uočeno je prisustvo dve faze MgTiO3 i Mg2TiO4 ali njihov međusobni odnos koncentracija varira u odnosu na temperaturu sinterovanja.",
publisher = "Međunarodni Institut za nauku o sinterovanju, Beograd",
journal = "Science of Sintering",
title = "Influence of mechanical activation on microstructure and crystal structure of sintered MgO-TiO2 system",
pages = "151-143",
number = "2",
volume = "42",
doi = "10.2298/SOS100518002F"
}

Filipović, S., Obradović, N., Pavlović, V., Marković, S., Mitrić, M.,& Ristić, M.M.. (2010). Influence of mechanical activation on microstructure and crystal structure of sintered MgO-TiO2 system. in Science of Sintering
Međunarodni Institut za nauku o sinterovanju, Beograd., 42(2), 143-151.
https://doi.org/10.2298/SOS100518002F

Filipović S, Obradović N, Pavlović V, Marković S, Mitrić M, Ristić M. Influence of mechanical activation on microstructure and crystal structure of sintered MgO-TiO2 system. in Science of Sintering. 2010;42(2):143-151.
doi:10.2298/SOS100518002F .

Filipović, Suzana, Obradović, N., Pavlović, Vladimir, Marković, S., Mitrić, M., Ristić, M.M., "Influence of mechanical activation on microstructure and crystal structure of sintered MgO-TiO2 system" in Science of Sintering, 42, no. 2 (2010):143-151,
https://doi.org/10.2298/SOS100518002F . .

TY  - JOUR
AU  - Filipović, Suzana
AU  - Obradović, N.
AU  - Pavlović, Vladimir
AU  - Petrović, V.
AU  - Mitrić, M.
PY  - 2009
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/2051
AB  - The aim of this work was to analyze the influence of mechanical activation on the MgCO3-TiO2 system. Mixtures of MgCO3-TiO2 were mechanically activated for 15, 30, 60 and 120 minutes in a planetary ball mill and after that sintered at 1100°C for 1h. XRD analyses were performed in order to give information about the phase composition and to determine a variety of microstructure parameters using Scherrer's method. Also, the effect of tribophysical activation and sintering process on microstructure was investigated by scanning electron microscopy. Electrical measurements were performed in order to determine electrical properties of sintered samples. Our conclusions are that the sample activated for 120 min showed the best electrical properties ( ε r=23.86, Q=233, ρ=0.38) and exhibited the best sinterability.
AB  - Cilj ovog rada bio je analiza uticaja mehaničke aktivacije na sistem MgCO3-TiO2. Smeše MgCO3-TiO2 su mehanički aktivirane u planetarnom mlinu sa kuglama u trajanju od 15, 30, 60 i 120 minuta i nakon toga sinterovane na 1100°C 1h. Radi utvrđivanja faznog sastava i promena mikrostrukturnih parametara, Šererovom metodom, urađena je rendgeno-difrakciona analiza. Efekti mehaničke aktivacije i procesa sinterovanja na mikrostrukturu ispitivani su skenirajućom elektronskom mikroskopijom. U cilju određivanja električnih svojstava sinteroanih uzoraka izvršena su električna merenja. Zaključak našeg rada je da uzorak sinterovan 120 minuta pokazuje najbolja električna svojstva (ε r=23,86; Q=233; ρ=0,38) i ispoljava najbolju sinterabilnost.
PB  - Međunarodni Institut za nauku o sinterovanju, Beograd
T2  - Science of Sintering
T1  - Influence of mechanical activation on structural and electrical properties of sintered MgTiO3 ceramics
EP  - 123
IS  - 2
SP  - 117
VL  - 41
DO  - 10.2298/SOS0902117F
ER  - 

@article{
author = "Filipović, Suzana and Obradović, N. and Pavlović, Vladimir and Petrović, V. and Mitrić, M.",
year = "2009",
abstract = "The aim of this work was to analyze the influence of mechanical activation on the MgCO3-TiO2 system. Mixtures of MgCO3-TiO2 were mechanically activated for 15, 30, 60 and 120 minutes in a planetary ball mill and after that sintered at 1100°C for 1h. XRD analyses were performed in order to give information about the phase composition and to determine a variety of microstructure parameters using Scherrer's method. Also, the effect of tribophysical activation and sintering process on microstructure was investigated by scanning electron microscopy. Electrical measurements were performed in order to determine electrical properties of sintered samples. Our conclusions are that the sample activated for 120 min showed the best electrical properties ( ε r=23.86, Q=233, ρ=0.38) and exhibited the best sinterability., Cilj ovog rada bio je analiza uticaja mehaničke aktivacije na sistem MgCO3-TiO2. Smeše MgCO3-TiO2 su mehanički aktivirane u planetarnom mlinu sa kuglama u trajanju od 15, 30, 60 i 120 minuta i nakon toga sinterovane na 1100°C 1h. Radi utvrđivanja faznog sastava i promena mikrostrukturnih parametara, Šererovom metodom, urađena je rendgeno-difrakciona analiza. Efekti mehaničke aktivacije i procesa sinterovanja na mikrostrukturu ispitivani su skenirajućom elektronskom mikroskopijom. U cilju određivanja električnih svojstava sinteroanih uzoraka izvršena su električna merenja. Zaključak našeg rada je da uzorak sinterovan 120 minuta pokazuje najbolja električna svojstva (ε r=23,86; Q=233; ρ=0,38) i ispoljava najbolju sinterabilnost.",
publisher = "Međunarodni Institut za nauku o sinterovanju, Beograd",
journal = "Science of Sintering",
title = "Influence of mechanical activation on structural and electrical properties of sintered MgTiO3 ceramics",
pages = "123-117",
number = "2",
volume = "41",
doi = "10.2298/SOS0902117F"
}

Filipović, S., Obradović, N., Pavlović, V., Petrović, V.,& Mitrić, M.. (2009). Influence of mechanical activation on structural and electrical properties of sintered MgTiO3 ceramics. in Science of Sintering
Međunarodni Institut za nauku o sinterovanju, Beograd., 41(2), 117-123.
https://doi.org/10.2298/SOS0902117F

Filipović S, Obradović N, Pavlović V, Petrović V, Mitrić M. Influence of mechanical activation on structural and electrical properties of sintered MgTiO3 ceramics. in Science of Sintering. 2009;41(2):117-123.
doi:10.2298/SOS0902117F .

Filipović, Suzana, Obradović, N., Pavlović, Vladimir, Petrović, V., Mitrić, M., "Influence of mechanical activation on structural and electrical properties of sintered MgTiO3 ceramics" in Science of Sintering, 41, no. 2 (2009):117-123,
https://doi.org/10.2298/SOS0902117F . .