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Živojinović, Jelena

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orcid::0000-0002-2977-7134
  • Živojinović, Jelena (17)
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Author's Bibliography

Analysis of the initial-stage sintering of mechanically activated SrTiO3

Živojinović, Jelena; Pavlović, Vera P.; Labus, Nebojša; Blagojević, Vladimir A.; Kosanović, Darko; Pavlović, Vladimir B.

(ETRAN, 2019)

TY  - JOUR
AU  - Živojinović, Jelena
AU  - Pavlović, Vera P.
AU  - Labus, Nebojša
AU  - Blagojević, Vladimir A.
AU  - Kosanović, Darko
AU  - Pavlović, Vladimir B.
PY  - 2019
UR  - http://dais.sanu.ac.rs/123456789/6885
AB  - The initial-stage of sintering plays a significant role in determining the final microstructure that defines the main characteristics of electroceramics materials such as functional properties. In this article non-isothermal sintering of non-activated and mechanically activated SrTiO3 samples was investigated up to 1300 °C. Dilatometric curves indicate that mechanical activation leads to an earlier onset of sintering, suggesting that it should lead to a more homogenous and denser sintered product. Analysis of the initial stage of sintering reveals that the sintering process of all examinated samples consists of two or three overlapping single-step processes, with a change in the dominant mass transport mechanism. The values of apparent activation energy of the considered single-step process exhibit a significant decrease with an increase in mechanical activation time. The values of the density of samples after isothermal sintering indicate that the final stage of sintering has not been reached by 1300 °C. © 2018 Authors.
PB  - ETRAN
T2  - Science of Sintering
T1  - Analysis of the initial-stage sintering of mechanically activated SrTiO3
SP  - 199
EP  - 208
VL  - 51
IS  - 2
DO  - 10.2298/SOS1902199Z
ER  - 
@article{
author = "Živojinović, Jelena and Pavlović, Vera P. and Labus, Nebojša and Blagojević, Vladimir A. and Kosanović, Darko and Pavlović, Vladimir B.",
year = "2019",
url = "http://dais.sanu.ac.rs/123456789/6885",
abstract = "The initial-stage of sintering plays a significant role in determining the final microstructure that defines the main characteristics of electroceramics materials such as functional properties. In this article non-isothermal sintering of non-activated and mechanically activated SrTiO3 samples was investigated up to 1300 °C. Dilatometric curves indicate that mechanical activation leads to an earlier onset of sintering, suggesting that it should lead to a more homogenous and denser sintered product. Analysis of the initial stage of sintering reveals that the sintering process of all examinated samples consists of two or three overlapping single-step processes, with a change in the dominant mass transport mechanism. The values of apparent activation energy of the considered single-step process exhibit a significant decrease with an increase in mechanical activation time. The values of the density of samples after isothermal sintering indicate that the final stage of sintering has not been reached by 1300 °C. © 2018 Authors.",
publisher = "ETRAN",
journal = "Science of Sintering",
title = "Analysis of the initial-stage sintering of mechanically activated SrTiO3",
pages = "199-208",
volume = "51",
number = "2",
doi = "10.2298/SOS1902199Z"
}
1

The influence of mechanical activation on structural evolution of nanocrystalline SrTiO3 powders

Živojinović, Jelena; Pavlović, Vera P.; Kosanović, Darko; Marković, Smilja; Krstić, Jugoslav; Blagojević, Vladimir A.; Pavlović, Vladimir B.

(Elsevier, 2017)

TY  - JOUR
AU  - Živojinović, Jelena
AU  - Pavlović, Vera P.
AU  - Kosanović, Darko
AU  - Marković, Smilja
AU  - Krstić, Jugoslav
AU  - Blagojević, Vladimir A.
AU  - Pavlović, Vladimir B.
PY  - 2017
UR  - http://dais.sanu.ac.rs/123456789/4617
AB  - Structural changes caused by mechanical activation of SrTiO3 powders were investigated using a variety of methods. Average crystallite size continuously decreased with increased activation time to around 20 nm after 120 min activation, while mesopore volume and specific surface area increased accordingly. Higher activation times lead to increased agglomeration of nanoparticles to form agglomerates of around 2 μm in size, ultimately producing a relatively stable powder, which exhibits lower microstrain than powders activated for shorter periods of time. Raman spectroscopy shows that the behavior of TO2 and TO4 modes is consistent with a decrease in particle size, while behavior of the nonpolar TO3 mode is markedly different, indicating relaxation of the inversion symmetry in polycrystalline SrTiO3. UV-VIS spectra show that mechanical activation has negligible effect on SrTiO3, with a slight shift caused by TiO2 contamination due to presence of air. Other than this, the mechanical activation process preserves the chemical purity of the initial powder.
PB  - Elsevier
T2  - Journal of Alloys and Compounds
T1  - The influence of mechanical activation on structural evolution of nanocrystalline SrTiO3 powders
SP  - 863
EP  - 870
VL  - 695
DO  - 10.1016/j.jallcom.2016.10.159
ER  - 
@article{
author = "Živojinović, Jelena and Pavlović, Vera P. and Kosanović, Darko and Marković, Smilja and Krstić, Jugoslav and Blagojević, Vladimir A. and Pavlović, Vladimir B.",
year = "2017",
url = "http://dais.sanu.ac.rs/123456789/4617",
abstract = "Structural changes caused by mechanical activation of SrTiO3 powders were investigated using a variety of methods. Average crystallite size continuously decreased with increased activation time to around 20 nm after 120 min activation, while mesopore volume and specific surface area increased accordingly. Higher activation times lead to increased agglomeration of nanoparticles to form agglomerates of around 2 μm in size, ultimately producing a relatively stable powder, which exhibits lower microstrain than powders activated for shorter periods of time. Raman spectroscopy shows that the behavior of TO2 and TO4 modes is consistent with a decrease in particle size, while behavior of the nonpolar TO3 mode is markedly different, indicating relaxation of the inversion symmetry in polycrystalline SrTiO3. UV-VIS spectra show that mechanical activation has negligible effect on SrTiO3, with a slight shift caused by TiO2 contamination due to presence of air. Other than this, the mechanical activation process preserves the chemical purity of the initial powder.",
publisher = "Elsevier",
journal = "Journal of Alloys and Compounds",
title = "The influence of mechanical activation on structural evolution of nanocrystalline SrTiO3 powders",
pages = "863-870",
volume = "695",
doi = "10.1016/j.jallcom.2016.10.159"
}
9
9
11

The influence of mechanical activation on structural evolution of nanocrystalline SrTiO3 powders

Živojinović, Jelena; Pavlović, Vera P.; Kosanović, Darko; Marković, Smilja; Krstić, Jugoslav; Blagojević, Vladimir A.; Pavlović, Vladimir B.

(Elsevier, 2017)

TY  - JOUR
AU  - Živojinović, Jelena
AU  - Pavlović, Vera P.
AU  - Kosanović, Darko
AU  - Marković, Smilja
AU  - Krstić, Jugoslav
AU  - Blagojević, Vladimir A.
AU  - Pavlović, Vladimir B.
PY  - 2017
UR  - http://dais.sanu.ac.rs/123456789/2355
AB  - Structural changes caused by mechanical activation of SrTiO3 powders were investigated using a variety of methods. Average crystallite size continuously decreased with increased activation time to around 20 nm after 120 min activation, while mesopore volume and specific surface area increased accordingly. Higher activation times lead to increased agglomeration of nanoparticles to form agglomerates of around 2 μm in size, ultimately producing a relatively stable powder, which exhibits lower microstrain than powders activated for shorter periods of time. Raman spectroscopy shows that the behavior of TO2 and TO4 modes is consistent with a decrease in particle size, while behavior of the nonpolar TO3 mode is markedly different, indicating relaxation of the inversion symmetry in polycrystalline SrTiO3. UV-VIS spectra show that mechanical activation has negligible effect on SrTiO3, with a slight shift caused by TiO2 contamination due to presence of air. Other than this, the mechanical activation process preserves the chemical purity of the initial powder.
PB  - Elsevier
T2  - Journal of Alloys and Compounds
T1  - The influence of mechanical activation on structural evolution of nanocrystalline SrTiO3 powders
SP  - 863
EP  - 870
VL  - 695
DO  - 10.1016/j.jallcom.2016.10.159
ER  - 
@article{
author = "Živojinović, Jelena and Pavlović, Vera P. and Kosanović, Darko and Marković, Smilja and Krstić, Jugoslav and Blagojević, Vladimir A. and Pavlović, Vladimir B.",
year = "2017",
url = "http://dais.sanu.ac.rs/123456789/2355",
abstract = "Structural changes caused by mechanical activation of SrTiO3 powders were investigated using a variety of methods. Average crystallite size continuously decreased with increased activation time to around 20 nm after 120 min activation, while mesopore volume and specific surface area increased accordingly. Higher activation times lead to increased agglomeration of nanoparticles to form agglomerates of around 2 μm in size, ultimately producing a relatively stable powder, which exhibits lower microstrain than powders activated for shorter periods of time. Raman spectroscopy shows that the behavior of TO2 and TO4 modes is consistent with a decrease in particle size, while behavior of the nonpolar TO3 mode is markedly different, indicating relaxation of the inversion symmetry in polycrystalline SrTiO3. UV-VIS spectra show that mechanical activation has negligible effect on SrTiO3, with a slight shift caused by TiO2 contamination due to presence of air. Other than this, the mechanical activation process preserves the chemical purity of the initial powder.",
publisher = "Elsevier",
journal = "Journal of Alloys and Compounds",
title = "The influence of mechanical activation on structural evolution of nanocrystalline SrTiO3 powders",
pages = "863-870",
volume = "695",
doi = "10.1016/j.jallcom.2016.10.159"
}
9
9
11

Influence of mechanical activation on mechanical properties of PVDF-nanoparticle composites

Živojinović, Jelena; Peleš, Adriana; Blagojević, Vladimir A.; Kosanović, Darko; Pavlović, Vladimir B.

(Belgrade : Serbian Ceramic Society, 2016)

TY  - CONF
AU  - Živojinović, Jelena
AU  - Peleš, Adriana
AU  - Blagojević, Vladimir A.
AU  - Kosanović, Darko
AU  - Pavlović, Vladimir B.
PY  - 2016
UR  - http://dais.sanu.ac.rs/123456789/882
AB  - The influence of mechanically activated fillers (ZnO, BaTiO3 and SrTiO3 ultra-fine powders) on mechanical properties of poly(vinylidene) fluoride (PVDF) and oxide nanoparticle composite was investigated using molecular simulations. Mechanical activation leads to the creation of new surfaces and the comminution of the initial powder particles, which affects the crystallization of PVDF matrix. In addition, prolonged mechanical activation leads to agglomeration of nanoparticles into “soft” and “hard” agglomerates of different sizes. All of this has a significant effect on mechanical properties of PVDF-nanoparticle composites. Microstructural changes due to mechanical activation in ZnO, BaTiO3 and SrTiO3 powders were investigated using SEM and XRD, while dependence of mechanical properties on nanoparticle size was investigated using molecular simulation. These show that smaller nanoparticles significantly enhance the mechanical properties of PVDF-nanoparticle composite and allow use of mechanical activation as a means of reducing the amount of nanoparticle filler in the composite, while achieving the same of superior mechanical properties.
PB  - Belgrade : Serbian Ceramic Society
C3  - Advanced Ceramics and Application : new frontiers in multifunctional material science and processing : program and the book of abstracts : V Serbian Ceramic Society Conference, Sep 21-23 September 2016, Belgrade
T1  - Influence of mechanical activation on mechanical properties of PVDF-nanoparticle composites
SP  - 63
EP  - 64
ER  - 
@conference{
author = "Živojinović, Jelena and Peleš, Adriana and Blagojević, Vladimir A. and Kosanović, Darko and Pavlović, Vladimir B.",
year = "2016",
url = "http://dais.sanu.ac.rs/123456789/882",
abstract = "The influence of mechanically activated fillers (ZnO, BaTiO3 and SrTiO3 ultra-fine powders) on mechanical properties of poly(vinylidene) fluoride (PVDF) and oxide nanoparticle composite was investigated using molecular simulations. Mechanical activation leads to the creation of new surfaces and the comminution of the initial powder particles, which affects the crystallization of PVDF matrix. In addition, prolonged mechanical activation leads to agglomeration of nanoparticles into “soft” and “hard” agglomerates of different sizes. All of this has a significant effect on mechanical properties of PVDF-nanoparticle composites. Microstructural changes due to mechanical activation in ZnO, BaTiO3 and SrTiO3 powders were investigated using SEM and XRD, while dependence of mechanical properties on nanoparticle size was investigated using molecular simulation. These show that smaller nanoparticles significantly enhance the mechanical properties of PVDF-nanoparticle composite and allow use of mechanical activation as a means of reducing the amount of nanoparticle filler in the composite, while achieving the same of superior mechanical properties.",
publisher = "Belgrade : Serbian Ceramic Society",
journal = "Advanced Ceramics and Application : new frontiers in multifunctional material science and processing : program and the book of abstracts : V Serbian Ceramic Society Conference, Sep 21-23 September 2016, Belgrade",
title = "Influence of mechanical activation on mechanical properties of PVDF-nanoparticle composites",
pages = "63-64"
}

Influence of mechanical activation on mechanical properties of PVDF-nanoparticle composites

Živojinović, Jelena; Peleš, Adriana; Blagojević, Vladimir A.; Kosanović, Darko; Pavlović, Vladimir B.

(2016)

TY  - CONF
AU  - Živojinović, Jelena
AU  - Peleš, Adriana
AU  - Blagojević, Vladimir A.
AU  - Kosanović, Darko
AU  - Pavlović, Vladimir B.
PY  - 2016
UR  - http://dais.sanu.ac.rs/123456789/861
AB  - Mechanical activation leads to the creation of new surfaces and decrease in particle size of the initial powder particles, which affects the crystallization of PVDF matrix.  In addition, prolonged mechanical activation leads to agglomeration of nanoparticles agglomerates of different sizes. 
Microstructural changes due to mechanical activation in ZnO, BaTiO3, SrTiO3 and TiO2 powders were investigated using electron microscopy (TEM and SEM), x-ray diffraction (XRD) and particle size analysis (PSA). These were correlated with molecular simulations of mechanical properties of PVDF-nanocluster composites with different oxide nanocluster sizes (1, 1.5 and 2 nm) 
Each system was simulated using a periodic system of metal oxide nanocrystal inside β-PVDF matrix. β-PVDF was chosen for its superior properties over α- and γ- phases. Geometry of each system was optimized prior to the calculation of mechanical properties using GULP v4.3 software package. 
Molecular simulations show that, in general, mechanical properties (Young modulus as an indication of elasticity, Shear modulus as an indication of hardness) for all systems improve with decrease in nanocluster size. This suggests that mechanical activation of fillers in PVDF-metal oxide nanoparticle composites should have a positive effect on the mechanical properties of composite systems. 
This suggests mechanical activation as an easy an inexpensive method of improving mechanical properties of polymer-nanocrystal composite materials.
T1  - Influence of mechanical activation on mechanical properties of PVDF-nanoparticle composites
ER  - 
@conference{
author = "Živojinović, Jelena and Peleš, Adriana and Blagojević, Vladimir A. and Kosanović, Darko and Pavlović, Vladimir B.",
year = "2016",
url = "http://dais.sanu.ac.rs/123456789/861",
abstract = "Mechanical activation leads to the creation of new surfaces and decrease in particle size of the initial powder particles, which affects the crystallization of PVDF matrix.  In addition, prolonged mechanical activation leads to agglomeration of nanoparticles agglomerates of different sizes. 
Microstructural changes due to mechanical activation in ZnO, BaTiO3, SrTiO3 and TiO2 powders were investigated using electron microscopy (TEM and SEM), x-ray diffraction (XRD) and particle size analysis (PSA). These were correlated with molecular simulations of mechanical properties of PVDF-nanocluster composites with different oxide nanocluster sizes (1, 1.5 and 2 nm) 
Each system was simulated using a periodic system of metal oxide nanocrystal inside β-PVDF matrix. β-PVDF was chosen for its superior properties over α- and γ- phases. Geometry of each system was optimized prior to the calculation of mechanical properties using GULP v4.3 software package. 
Molecular simulations show that, in general, mechanical properties (Young modulus as an indication of elasticity, Shear modulus as an indication of hardness) for all systems improve with decrease in nanocluster size. This suggests that mechanical activation of fillers in PVDF-metal oxide nanoparticle composites should have a positive effect on the mechanical properties of composite systems. 
This suggests mechanical activation as an easy an inexpensive method of improving mechanical properties of polymer-nanocrystal composite materials.",
title = "Influence of mechanical activation on mechanical properties of PVDF-nanoparticle composites"
}

The influence of mechanical activation on the electrical properties of Ba0.77Sr0.23TiO3 ceramics

Kosanović, Darko; Živojinović, Jelena; Obradović, Nina; Pavlović, Vera P.; Pavlović, Vladimir B.; Peleš, Adriana; Ristić, Momčilo M.

(2014)

TY  - JOUR
AU  - Kosanović, Darko
AU  - Živojinović, Jelena
AU  - Obradović, Nina
AU  - Pavlović, Vera P.
AU  - Pavlović, Vladimir B.
AU  - Peleš, Adriana
AU  - Ristić, Momčilo M.
PY  - 2014
UR  - http://dais.sanu.ac.rs/123456789/543
AB  - Ferroelectric barium strontium titanate (Ba0.77Sr0.23TiO3), BST, was prepared by solid-state reactions using as the starting compounds powder of barium carbonate (BaCO3), strontium carbonate (SrCO3) and titanium dioxide (TiO2–anatase). Non-activated mixtures and mixtures mechanically activated in a high-energy planetary ball mill (0, 5, 10, 20, 40, 80 and 120 min) were sintered at 1100, 1200, 1300 and 1400 °C for 2 h in air atmosphere. Defects and the effect of the beginning of the sintering process on the microstructure were investigated by scanning electron microscopy (SEM). Electrical measurements (loss tangent and resistivity as the function of frequency XC=f(log ν)) were performed for ceramics sintered at 1400 °C for 2 h. It has been found that mechanical activation can reduce the sintering temperature by around 100 °C, which leads to significant energy savings. Furthermore, activated for 80 min and sintered at 1400 °C for 2 h exhibit the largest density values and have about 36% lower dielectric loss at a frequency of 1 kHz and about 57% at a frequency of 10 kHz than the samples obtained from the initial non-activated powder sintered under the same conditions.
T2  - Ceramics International
T1  - The influence of mechanical activation on the electrical properties of Ba0.77Sr0.23TiO3 ceramics
SP  - 11883
EP  - 11888
VL  - 40
IS  - 8, Part A
DO  - 10.1016/j.ceramint.2014.04.023
ER  - 
@article{
author = "Kosanović, Darko and Živojinović, Jelena and Obradović, Nina and Pavlović, Vera P. and Pavlović, Vladimir B. and Peleš, Adriana and Ristić, Momčilo M.",
year = "2014",
url = "http://dais.sanu.ac.rs/123456789/543",
abstract = "Ferroelectric barium strontium titanate (Ba0.77Sr0.23TiO3), BST, was prepared by solid-state reactions using as the starting compounds powder of barium carbonate (BaCO3), strontium carbonate (SrCO3) and titanium dioxide (TiO2–anatase). Non-activated mixtures and mixtures mechanically activated in a high-energy planetary ball mill (0, 5, 10, 20, 40, 80 and 120 min) were sintered at 1100, 1200, 1300 and 1400 °C for 2 h in air atmosphere. Defects and the effect of the beginning of the sintering process on the microstructure were investigated by scanning electron microscopy (SEM). Electrical measurements (loss tangent and resistivity as the function of frequency XC=f(log ν)) were performed for ceramics sintered at 1400 °C for 2 h. It has been found that mechanical activation can reduce the sintering temperature by around 100 °C, which leads to significant energy savings. Furthermore, activated for 80 min and sintered at 1400 °C for 2 h exhibit the largest density values and have about 36% lower dielectric loss at a frequency of 1 kHz and about 57% at a frequency of 10 kHz than the samples obtained from the initial non-activated powder sintered under the same conditions.",
journal = "Ceramics International",
title = "The influence of mechanical activation on the electrical properties of Ba0.77Sr0.23TiO3 ceramics",
pages = "11883-11888",
volume = "40",
number = "8, Part A",
doi = "10.1016/j.ceramint.2014.04.023"
}
3
5
5

The influence of mechanical activation on the electrical properties of Ba0.77Sr0.23TiO3 ceramics

Kosanović, Darko; Živojinović, Jelena; Obradović, Nina; Pavlović, Vera P.; Pavlović, Vladimir B.; Peleš, Adriana; Ristić, Momčilo M.

(Elsevier, 2014)

TY  - JOUR
AU  - Kosanović, Darko
AU  - Živojinović, Jelena
AU  - Obradović, Nina
AU  - Pavlović, Vera P.
AU  - Pavlović, Vladimir B.
AU  - Peleš, Adriana
AU  - Ristić, Momčilo M.
PY  - 2014
UR  - http://dais.sanu.ac.rs/123456789/544
AB  - Ferroelectric barium strontium titanate (Ba0.77Sr0.23TiO3), BST, was prepared by solid-state reactions using as the starting compounds powder of barium carbonate (BaCO3), strontium carbonate (SrCO3) and titanium dioxide (TiO2–anatase). Non-activated mixtures and mixtures mechanically activated in a high-energy planetary ball mill (0, 5, 10, 20, 40, 80 and 120 min) were sintered at 1100, 1200, 1300 and 1400 °C for 2 h in air atmosphere. Defects and the effect of the beginning of the sintering process on the microstructure were investigated by scanning electron microscopy (SEM). Electrical measurements (loss tangent and resistivity as the function of frequency XC=f(log ν)) were performed for ceramics sintered at 1400 °C for 2 h. It has been found that mechanical activation can reduce the sintering temperature by around 100 °C, which leads to significant energy savings. Furthermore, activated for 80 min and sintered at 1400 °C for 2 h exhibit the largest density values and have about 36% lower dielectric loss at a frequency of 1 kHz and about 57% at a frequency of 10 kHz than the samples obtained from the initial non-activated powder sintered under the same conditions.
PB  - Elsevier
T2  - Ceramics International
T1  - The influence of mechanical activation on the electrical properties of Ba0.77Sr0.23TiO3 ceramics
SP  - 11883
EP  - 11888
IS  - 8, Part A
DO  - 10.1016/j.ceramint.2014.04.023
ER  - 
@article{
author = "Kosanović, Darko and Živojinović, Jelena and Obradović, Nina and Pavlović, Vera P. and Pavlović, Vladimir B. and Peleš, Adriana and Ristić, Momčilo M.",
year = "2014",
url = "http://dais.sanu.ac.rs/123456789/544",
abstract = "Ferroelectric barium strontium titanate (Ba0.77Sr0.23TiO3), BST, was prepared by solid-state reactions using as the starting compounds powder of barium carbonate (BaCO3), strontium carbonate (SrCO3) and titanium dioxide (TiO2–anatase). Non-activated mixtures and mixtures mechanically activated in a high-energy planetary ball mill (0, 5, 10, 20, 40, 80 and 120 min) were sintered at 1100, 1200, 1300 and 1400 °C for 2 h in air atmosphere. Defects and the effect of the beginning of the sintering process on the microstructure were investigated by scanning electron microscopy (SEM). Electrical measurements (loss tangent and resistivity as the function of frequency XC=f(log ν)) were performed for ceramics sintered at 1400 °C for 2 h. It has been found that mechanical activation can reduce the sintering temperature by around 100 °C, which leads to significant energy savings. Furthermore, activated for 80 min and sintered at 1400 °C for 2 h exhibit the largest density values and have about 36% lower dielectric loss at a frequency of 1 kHz and about 57% at a frequency of 10 kHz than the samples obtained from the initial non-activated powder sintered under the same conditions.",
publisher = "Elsevier",
journal = "Ceramics International",
title = "The influence of mechanical activation on the electrical properties of Ba0.77Sr0.23TiO3 ceramics",
pages = "11883-11888",
number = "8, Part A",
doi = "10.1016/j.ceramint.2014.04.023"
}
3
5
5

Density of the ZnTiO3 nanopowder as a loose powder and as a compact obtained by different methods

Labus, Nebojša; Krstić, Jugoslav; Peleš, Adriana; Živojinović, Jelena; Nikolić, Maria Vesna

(Belgrade : Serbian Ceramic Society, 2013)

TY  - CONF
AU  - Labus, Nebojša
AU  - Krstić, Jugoslav
AU  - Peleš, Adriana
AU  - Živojinović, Jelena
AU  - Nikolić, Maria Vesna
PY  - 2013
UR  - http://dais.sanu.ac.rs/123456789/411
AB  - Nanopowder density, as well as compact density, is due to powder particle size, different in their values, compared to micron powders. Also, the technique used for density determination induces large mutual value discrepancies. Scanning electron micrographs of as received powder are presented as an illustration of the shape and size of powder particles and agglomerates. The density of the loose powder pretreated differently was determined using mercury porosimetry and He pycnometry. The methods used for determining the apparent density of the compacts were pycnometry with water as the wetting liquid, mercury porosimetry and also a new approach using a combination of mercury pycnometry along with nitrogen adsorption. Bulk densities of compacts were determined by dimension measurement and mercury pycnometry. Conclusions about nanopowder usage as a charge for dry compaction as well as the most appropriate way for the determination of compact and powder densities are shown.
PB  - Belgrade : Serbian Ceramic Society
C3  - Advanced Ceramics and Application : new frontiers in multifunctional material science and processing : program and the book of abstracts : II Serbian Ceramic Society Conference, Sep 30th-Oct 1st, 2013, Belgrade
T1  - Density of the ZnTiO3 nanopowder as a loose powder and as a compact obtained by different methods
SP  - 18
EP  - 18
ER  - 
@conference{
author = "Labus, Nebojša and Krstić, Jugoslav and Peleš, Adriana and Živojinović, Jelena and Nikolić, Maria Vesna",
year = "2013",
url = "http://dais.sanu.ac.rs/123456789/411",
abstract = "Nanopowder density, as well as compact density, is due to powder particle size, different in their values, compared to micron powders. Also, the technique used for density determination induces large mutual value discrepancies. Scanning electron micrographs of as received powder are presented as an illustration of the shape and size of powder particles and agglomerates. The density of the loose powder pretreated differently was determined using mercury porosimetry and He pycnometry. The methods used for determining the apparent density of the compacts were pycnometry with water as the wetting liquid, mercury porosimetry and also a new approach using a combination of mercury pycnometry along with nitrogen adsorption. Bulk densities of compacts were determined by dimension measurement and mercury pycnometry. Conclusions about nanopowder usage as a charge for dry compaction as well as the most appropriate way for the determination of compact and powder densities are shown.",
publisher = "Belgrade : Serbian Ceramic Society",
journal = "Advanced Ceramics and Application : new frontiers in multifunctional material science and processing : program and the book of abstracts : II Serbian Ceramic Society Conference, Sep 30th-Oct 1st, 2013, Belgrade",
title = "Density of the ZnTiO3 nanopowder as a loose powder and as a compact obtained by different methods",
pages = "18-18"
}

Characterization of mechanically activated ZnO powder

Peleš, Adriana; Pavlović, Vera P.; Obradović, Nina; Živojinović, Jelena; Mitrić, Miodrag; Pavlović, Vladimir B.

(Belgrade : Serbian Ceramic Society, 2013)

TY  - CONF
AU  - Peleš, Adriana
AU  - Pavlović, Vera P.
AU  - Obradović, Nina
AU  - Živojinović, Jelena
AU  - Mitrić, Miodrag
AU  - Pavlović, Vladimir B.
PY  - 2013
UR  - http://dais.sanu.ac.rs/123456789/426
AB  - Materials based on ZnO structure have more frequently application as fillers in polymer ceramics nanocompozites. Performances of these materials depends on fillers morphology, surfaces texture and particles size. According to this, in this paper, the authors investigated the influence of mechanical activation of ZnO powder on crystal and micro structure. Commercially available ZnO powder was activated in a planetary ball mill for 2, 5, 10 and 30 minutes. Characterization of such obtained powders was performed using XRD, SEM and Raman spectroscopy. XRD patterns indicated at lowering of peak intensities along with its broadening wich is realted to partical fragmentation and amorphyzation. Micrographs show irregularly shaped particles at the beginning and with prolonged milling time, particles gained uniformed distibution, while after 30 minutes of activation agglomerates started forming. The results we got by investigation of dynamical structure by Raman spectroscopy are in correlation with the other results of structures analysis. Results presented here enable further optimization of, polymer nanocompozite based on ZnO and PVDF, making process.
PB  - Belgrade : Serbian Ceramic Society
C3  - Advanced Ceramics and Application : new frontiers in multifunctional material science and processing : program and the book of abstracts : II Serbian Ceramic Society Conference, Sep 30th-Oct 1st, 2013, Belgrade
T1  - Characterization of mechanically activated ZnO powder
SP  - 47
EP  - 47
ER  - 
@conference{
author = "Peleš, Adriana and Pavlović, Vera P. and Obradović, Nina and Živojinović, Jelena and Mitrić, Miodrag and Pavlović, Vladimir B.",
year = "2013",
url = "http://dais.sanu.ac.rs/123456789/426",
abstract = "Materials based on ZnO structure have more frequently application as fillers in polymer ceramics nanocompozites. Performances of these materials depends on fillers morphology, surfaces texture and particles size. According to this, in this paper, the authors investigated the influence of mechanical activation of ZnO powder on crystal and micro structure. Commercially available ZnO powder was activated in a planetary ball mill for 2, 5, 10 and 30 minutes. Characterization of such obtained powders was performed using XRD, SEM and Raman spectroscopy. XRD patterns indicated at lowering of peak intensities along with its broadening wich is realted to partical fragmentation and amorphyzation. Micrographs show irregularly shaped particles at the beginning and with prolonged milling time, particles gained uniformed distibution, while after 30 minutes of activation agglomerates started forming. The results we got by investigation of dynamical structure by Raman spectroscopy are in correlation with the other results of structures analysis. Results presented here enable further optimization of, polymer nanocompozite based on ZnO and PVDF, making process.",
publisher = "Belgrade : Serbian Ceramic Society",
journal = "Advanced Ceramics and Application : new frontiers in multifunctional material science and processing : program and the book of abstracts : II Serbian Ceramic Society Conference, Sep 30th-Oct 1st, 2013, Belgrade",
title = "Characterization of mechanically activated ZnO powder",
pages = "47-47"
}

The influence of mechanical activation on the electrical properties of Ba0.77Sr0.23TiO3 ceramics

Kosanović, Darko; Živojinović, Jelena; Obradović, Nina; Pavlović, Vera P.; Pavlović, Vladimir B.; Ristić, Momčilo M.

(Belgrade : Serbian Ceramic Society, 2013)

TY  - CONF
AU  - Kosanović, Darko
AU  - Živojinović, Jelena
AU  - Obradović, Nina
AU  - Pavlović, Vera P.
AU  - Pavlović, Vladimir B.
AU  - Ristić, Momčilo M.
PY  - 2013
UR  - http://dais.sanu.ac.rs/123456789/415
AB  - Ferroelectric ceramic barium strontium titanate (Ba0.77Sr0.23TiO3), BST, was prepared by solid-state reactions using starting powders of barium carbonate (BaCO3), strontium carbonate (SrCO3) and titanium dioxide (TiO2-anatase). Non-activated and mechanically activated mixtures with high-energy planetary ball mill (0, 5, 10, 20, 80 and 120 minutes) were sintered at 1100, 1200, 1300 and 1400 °C for two hours in air. The maximum value of ceramic density is about 86.20% TG. X-ray diffraction analysis was used to obtain information on the phase composition, as well as determining the influence of mechanical activation on the half height width of the diffraction lines (111) BST isothermally sintered samples at 1400 °C during two hours. Defects and the beginning process of sintering on the microstructure were investigated by scanning electron microscopy (SEM). Electrical measurements (loss tangent of the angle, Nyquist diagrams and influence the activation time dependence of XC = f (log ν)) are made of ceramics sintered at 1400 °C for two hours.
PB  - Belgrade : Serbian Ceramic Society
C3  - Advanced Ceramics and Application : new frontiers in multifunctional material science and processing : program and the book of abstracts : II Serbian Ceramic Society Conference, Sep 30th-Oct 1st, 2013, Belgrade
T1  - The influence of mechanical activation on the electrical properties of Ba0.77Sr0.23TiO3 ceramics
SP  - 39
EP  - 39
ER  - 
@conference{
author = "Kosanović, Darko and Živojinović, Jelena and Obradović, Nina and Pavlović, Vera P. and Pavlović, Vladimir B. and Ristić, Momčilo M.",
year = "2013",
url = "http://dais.sanu.ac.rs/123456789/415",
abstract = "Ferroelectric ceramic barium strontium titanate (Ba0.77Sr0.23TiO3), BST, was prepared by solid-state reactions using starting powders of barium carbonate (BaCO3), strontium carbonate (SrCO3) and titanium dioxide (TiO2-anatase). Non-activated and mechanically activated mixtures with high-energy planetary ball mill (0, 5, 10, 20, 80 and 120 minutes) were sintered at 1100, 1200, 1300 and 1400 °C for two hours in air. The maximum value of ceramic density is about 86.20% TG. X-ray diffraction analysis was used to obtain information on the phase composition, as well as determining the influence of mechanical activation on the half height width of the diffraction lines (111) BST isothermally sintered samples at 1400 °C during two hours. Defects and the beginning process of sintering on the microstructure were investigated by scanning electron microscopy (SEM). Electrical measurements (loss tangent of the angle, Nyquist diagrams and influence the activation time dependence of XC = f (log ν)) are made of ceramics sintered at 1400 °C for two hours.",
publisher = "Belgrade : Serbian Ceramic Society",
journal = "Advanced Ceramics and Application : new frontiers in multifunctional material science and processing : program and the book of abstracts : II Serbian Ceramic Society Conference, Sep 30th-Oct 1st, 2013, Belgrade",
title = "The influence of mechanical activation on the electrical properties of Ba0.77Sr0.23TiO3 ceramics",
pages = "39-39"
}

The influence of mechanical activation on the electrical properties of Ba0.77Sr0.23TiO3

Kosanović, Darko; Živojinović, Jelena; Obradović, Nina; Pavlović, Vera P.; Pavlović, Vladimir B.; Peleš, Adriana; Ristić, Momčilo M.

(2013)

TY  - CONF
AU  - Kosanović, Darko
AU  - Živojinović, Jelena
AU  - Obradović, Nina
AU  - Pavlović, Vera P.
AU  - Pavlović, Vladimir B.
AU  - Peleš, Adriana
AU  - Ristić, Momčilo M.
PY  - 2013
UR  - http://dais.sanu.ac.rs/123456789/151
AB  - Poster presented at the conference Advanced Ceramics and Application II – Serbian Ceramic Society, Belgrade, September 30 – October 1, 2013
T1  - The influence of mechanical activation on the electrical properties of Ba0.77Sr0.23TiO3
ER  - 
@conference{
author = "Kosanović, Darko and Živojinović, Jelena and Obradović, Nina and Pavlović, Vera P. and Pavlović, Vladimir B. and Peleš, Adriana and Ristić, Momčilo M.",
year = "2013",
url = "http://dais.sanu.ac.rs/123456789/151",
abstract = "Poster presented at the conference Advanced Ceramics and Application II – Serbian Ceramic Society, Belgrade, September 30 – October 1, 2013",
title = "The influence of mechanical activation on the electrical properties of Ba0.77Sr0.23TiO3"
}

Dilatometric Analysis of Mechanically Activated SrTiO3 Powder

Živojinović, Jelena; Kosanović, Darko; Obradović, Nina; Peleš, Adriana; Labus, Nebojša; Filipović, Suzana; Pavlović, Vladimir B.; Mitrić, Miodrag; Ristić, Momčilo M.

(Belgrade : Serbian Ceramic Society, 2013)

TY  - CONF
AU  - Živojinović, Jelena
AU  - Kosanović, Darko
AU  - Obradović, Nina
AU  - Peleš, Adriana
AU  - Labus, Nebojša
AU  - Filipović, Suzana
AU  - Pavlović, Vladimir B.
AU  - Mitrić, Miodrag
AU  - Ristić, Momčilo M.
PY  - 2013
UR  - http://dais.sanu.ac.rs/123456789/414
AB  - Strontium-titanate powder was mechanically activated in a planetary ball mill for 0, 5, 10, 30, 60, 90 and 120 minutes. Non-isothermal sintering of non-activated and activated SrTiO3 powder samples in the temperature interval from 50 to 1300 0C with three different heating rates (10, 15 and 20 0C/min) was investigated on a dilatometer. X-ray powder diffraction and scanning electron microscopy (SEM) were used to determine the phase composition, lattice microstrains and microstructure morphology of the samples. XRD results showed the presence of new phases: SrCO3 (strontuim-carbonate) and TiO2 (anatase) after 30 minutes of  mechanical activation.
PB  - Belgrade : Serbian Ceramic Society
C3  - Advanced Ceramics and Application : new frontiers in multifunctional material science and processing : program and the book of abstracts : II Serbian Ceramic Society Conference, Sep 30th-Oct 1st, 2013, Belgrade
T1  - Dilatometric Analysis of Mechanically Activated SrTiO3 Powder
SP  - 38
EP  - 38
ER  - 
@conference{
author = "Živojinović, Jelena and Kosanović, Darko and Obradović, Nina and Peleš, Adriana and Labus, Nebojša and Filipović, Suzana and Pavlović, Vladimir B. and Mitrić, Miodrag and Ristić, Momčilo M.",
year = "2013",
url = "http://dais.sanu.ac.rs/123456789/414",
abstract = "Strontium-titanate powder was mechanically activated in a planetary ball mill for 0, 5, 10, 30, 60, 90 and 120 minutes. Non-isothermal sintering of non-activated and activated SrTiO3 powder samples in the temperature interval from 50 to 1300 0C with three different heating rates (10, 15 and 20 0C/min) was investigated on a dilatometer. X-ray powder diffraction and scanning electron microscopy (SEM) were used to determine the phase composition, lattice microstrains and microstructure morphology of the samples. XRD results showed the presence of new phases: SrCO3 (strontuim-carbonate) and TiO2 (anatase) after 30 minutes of  mechanical activation.",
publisher = "Belgrade : Serbian Ceramic Society",
journal = "Advanced Ceramics and Application : new frontiers in multifunctional material science and processing : program and the book of abstracts : II Serbian Ceramic Society Conference, Sep 30th-Oct 1st, 2013, Belgrade",
title = "Dilatometric Analysis of Mechanically Activated SrTiO3 Powder",
pages = "38-38"
}

Mechanical-chemical synthesis Ba0.77Sr0.23TiO3

Kosanović, Darko; Obradović, Nina; Živojinović, Jelena; Filipović, Suzana; Maričić, Aleksa; Pavlović, Vladimir B.; Tang, Y.; Ristić, Momčilo M.

(Belgrade : International Institute for the Science of Sintering, 2012)

TY  - JOUR
AU  - Kosanović, Darko
AU  - Obradović, Nina
AU  - Živojinović, Jelena
AU  - Filipović, Suzana
AU  - Maričić, Aleksa
AU  - Pavlović, Vladimir B.
AU  - Tang, Y.
AU  - Ristić, Momčilo M.
PY  - 2012
UR  - http://dais.sanu.ac.rs/123456789/191
AB  - Barium-Strontium-Titanate Ba0.77Sr0.23TiO3 was prepared from starting materials BaCO3, SrCO3 and TiO2 through solid-state reactions. Mixtures of these oxides are mechanically activated in a high-energy planetary ball mill at different time intervals from 0 to 120 minutes. In order to obtain information on phase composition, crystal structure was determent by X-ray diffraction. It was observed that after 80 minutes in process synthesis Ba0.77Sr0.23TiO3 started Thermal analyzes were performed in order to determine the characteristic temperatures of the processes that occur in the solid phase. Particle size distribution, together with electron microscopy scanning has given us very useful information about the morphology of the powder.
PB  - Belgrade : International Institute for the Science of Sintering
T2  - Science of Sintering
T1  - Mechanical-chemical synthesis Ba0.77Sr0.23TiO3
SP  - 47
EP  - 55
VL  - 44
IS  - 1
DO  - 10.2298/SOS1201047K
ER  - 
@article{
author = "Kosanović, Darko and Obradović, Nina and Živojinović, Jelena and Filipović, Suzana and Maričić, Aleksa and Pavlović, Vladimir B. and Tang, Y. and Ristić, Momčilo M.",
year = "2012",
url = "http://dais.sanu.ac.rs/123456789/191",
abstract = "Barium-Strontium-Titanate Ba0.77Sr0.23TiO3 was prepared from starting materials BaCO3, SrCO3 and TiO2 through solid-state reactions. Mixtures of these oxides are mechanically activated in a high-energy planetary ball mill at different time intervals from 0 to 120 minutes. In order to obtain information on phase composition, crystal structure was determent by X-ray diffraction. It was observed that after 80 minutes in process synthesis Ba0.77Sr0.23TiO3 started Thermal analyzes were performed in order to determine the characteristic temperatures of the processes that occur in the solid phase. Particle size distribution, together with electron microscopy scanning has given us very useful information about the morphology of the powder.",
publisher = "Belgrade : International Institute for the Science of Sintering",
journal = "Science of Sintering",
title = "Mechanical-chemical synthesis Ba0.77Sr0.23TiO3",
pages = "47-55",
volume = "44",
number = "1",
doi = "10.2298/SOS1201047K"
}
5
8
8

Influence of Mechanical Activation on the Constituents of the MgO-Al2O3-SiO2-TiO2 System

Đorđević, Nataša; Obradović, Nina; Filipović, Suzana; Živojinović, Jelena; Mitrić, Miodrag; Marković, Smilja

(Belgrade : Serbian Ceramic Society, 2012)

TY  - CONF
AU  - Đorđević, Nataša
AU  - Obradović, Nina
AU  - Filipović, Suzana
AU  - Živojinović, Jelena
AU  - Mitrić, Miodrag
AU  - Marković, Smilja
PY  - 2012
UR  - http://dais.sanu.ac.rs/123456789/499
AB  - Cordierite, 2MgO2Al2O35SiO2, is a very attractive high-temperature ceramic material, due to its outstanding electrical characteristics, such as the low temperature expansion coefficient, low dielectric constant and good mechanical properties. In order to accelerate the process of sintering, 5.00 mass% TiO2 has been added to the starting mixtures. The mechanical activation of the starting mixtures was performed in a high energy ball mill during 0-80 minutes. The particle size analysis (PSA) was employed in order to determine the changes in the particle size of the mechanically treated powders. The phase composition of the starting powders was analyzed by the X-ray diffraction method. XRD showed decrease in peaks intensities and no new phases. Furthermore, differential thermal analysis (DTA) was used in order to determine characteristic temperatures within the system during heating. Based on the obtained DTA results, it was established that mechanical activation has some influence on temperatures of phase transitions.
PB  - Belgrade : Serbian Ceramic Society
C3  - The First Serbian Ceramic Society Conference "Advanced Ceramics and Application" May 10-11, 2012: Program and the Book of Abstracts
T1  - Influence of Mechanical Activation on the Constituents of the MgO-Al2O3-SiO2-TiO2 System
SP  - 7
EP  - 7
ER  - 
@conference{
author = "Đorđević, Nataša and Obradović, Nina and Filipović, Suzana and Živojinović, Jelena and Mitrić, Miodrag and Marković, Smilja",
year = "2012",
url = "http://dais.sanu.ac.rs/123456789/499",
abstract = "Cordierite, 2MgO2Al2O35SiO2, is a very attractive high-temperature ceramic material, due to its outstanding electrical characteristics, such as the low temperature expansion coefficient, low dielectric constant and good mechanical properties. In order to accelerate the process of sintering, 5.00 mass% TiO2 has been added to the starting mixtures. The mechanical activation of the starting mixtures was performed in a high energy ball mill during 0-80 minutes. The particle size analysis (PSA) was employed in order to determine the changes in the particle size of the mechanically treated powders. The phase composition of the starting powders was analyzed by the X-ray diffraction method. XRD showed decrease in peaks intensities and no new phases. Furthermore, differential thermal analysis (DTA) was used in order to determine characteristic temperatures within the system during heating. Based on the obtained DTA results, it was established that mechanical activation has some influence on temperatures of phase transitions.",
publisher = "Belgrade : Serbian Ceramic Society",
journal = "The First Serbian Ceramic Society Conference "Advanced Ceramics and Application" May 10-11, 2012: Program and the Book of Abstracts",
title = "Influence of Mechanical Activation on the Constituents of the MgO-Al2O3-SiO2-TiO2 System",
pages = "7-7"
}

The influence of mechanical activation on sintering process of BaCO3-SrCO3-TiO2 system

Kosanović, Darko; Obradović, Nina; Živojinović, Jelena; Maričić, Aleksa; Pavlović, Vera P.; Pavlović, Vladimir B.; Ristić, Momčilo M.

(Belgrade : International Institute for the Science of Sintering, 2012)

TY  - JOUR
AU  - Kosanović, Darko
AU  - Obradović, Nina
AU  - Živojinović, Jelena
AU  - Maričić, Aleksa
AU  - Pavlović, Vera P.
AU  - Pavlović, Vladimir B.
AU  - Ristić, Momčilo M.
PY  - 2012
UR  - http://dais.sanu.ac.rs/123456789/195
AB  - In this article the influence of mechanical activation on sintering process of bariumstrontium-titanate ceramics has been investigated. Both non-activated and mixtures treated in a planetary ball mill for 5, 10, 20, 40, 80 and 120 minutes were sintered at 1100-1400°C for 2 hours in presence of air atmosphere. The influence of mechanical activation on phase composition and crystal structure has been analyzed by XRD, while the effect of activation and sintering process on microstructure was investigated by scanning electron microscopy. It has been established that temperature of 1100°C was too low to induce final sintering stage for this system. Electrical measurements have been conducted for the densest ceramics sintered at 1400°C for 2 hours. [Projekat Ministarstva nauke Republike Srbije, br. OI172057]
PB  - Belgrade : International Institute for the Science of Sintering
T2  - Science of Sintering
T1  - The influence of mechanical activation on sintering process of BaCO3-SrCO3-TiO2 system
SP  - 271
EP  - 280
VL  - 44
IS  - 3
DO  - 10.2298/SOS1203271K
ER  - 
@article{
author = "Kosanović, Darko and Obradović, Nina and Živojinović, Jelena and Maričić, Aleksa and Pavlović, Vera P. and Pavlović, Vladimir B. and Ristić, Momčilo M.",
year = "2012",
url = "http://dais.sanu.ac.rs/123456789/195",
abstract = "In this article the influence of mechanical activation on sintering process of bariumstrontium-titanate ceramics has been investigated. Both non-activated and mixtures treated in a planetary ball mill for 5, 10, 20, 40, 80 and 120 minutes were sintered at 1100-1400°C for 2 hours in presence of air atmosphere. The influence of mechanical activation on phase composition and crystal structure has been analyzed by XRD, while the effect of activation and sintering process on microstructure was investigated by scanning electron microscopy. It has been established that temperature of 1100°C was too low to induce final sintering stage for this system. Electrical measurements have been conducted for the densest ceramics sintered at 1400°C for 2 hours. [Projekat Ministarstva nauke Republike Srbije, br. OI172057]",
publisher = "Belgrade : International Institute for the Science of Sintering",
journal = "Science of Sintering",
title = "The influence of mechanical activation on sintering process of BaCO3-SrCO3-TiO2 system",
pages = "271-280",
volume = "44",
number = "3",
doi = "10.2298/SOS1203271K"
}
4
5
4

Uticaj mehaničke energije na komponente MgO-Al2O3-SiO2-TiO2 sistema

Đorđević, Nataša; Obradović, Nina; Filipović, Suzana; Živojinović, Jelena; Mitrić, Miodrag; Marković, Smilja

(Beograd : Savez inženjera i tehničara Srbije, 2012)

TY  - JOUR
AU  - Đorđević, Nataša
AU  - Obradović, Nina
AU  - Filipović, Suzana
AU  - Živojinović, Jelena
AU  - Mitrić, Miodrag
AU  - Marković, Smilja
PY  - 2012
UR  - http://dais.sanu.ac.rs/123456789/463
AB  - U ovom radu je ispitivan uticaj mehaničke energije na strukturu i promene u mikrostrukturi sistema MgO-Al2O3-SiO2-TiO2. Utvrđeno je da mehanička energija pospešuje homogenizaciju polaznih komponenti, utiče na veličinu i oblik zrna praškastih materijala i podstiče promene u kristalnoj strukturi polaznih čestica, sto utiče na pojavu defekata u ispitivanom sistemu. Ove promene su utvrđene difraktometrijskom analizom, kao i PSA i DTA metodom.
AB  - In this paper the effects of mechanical activation on structural and microstructural changes of the system MgO-Al2O3-SiO2-TiO2 were analyzed. It was confirmed that mechanical activation led to the homogenization of powder particles, the comminuting of particles, and after this period, the introduced energy was used to induce changes in the crystal structure, which resulted in the emergence of defects, initially on the surface of the crystal lattice, and then inside.
PB  - Beograd : Savez inženjera i tehničara Srbije
T2  - Tehnika – Novi materijali
T1  - Uticaj mehaničke energije na komponente MgO-Al2O3-SiO2-TiO2 sistema
SP  - 329
EP  - 333
ER  - 
@article{
author = "Đorđević, Nataša and Obradović, Nina and Filipović, Suzana and Živojinović, Jelena and Mitrić, Miodrag and Marković, Smilja",
year = "2012",
url = "http://dais.sanu.ac.rs/123456789/463",
abstract = "U ovom radu je ispitivan uticaj mehaničke energije na strukturu i promene u mikrostrukturi sistema MgO-Al2O3-SiO2-TiO2. Utvrđeno je da mehanička energija pospešuje homogenizaciju polaznih komponenti, utiče na veličinu i oblik zrna praškastih materijala i podstiče promene u kristalnoj strukturi polaznih čestica, sto utiče na pojavu defekata u ispitivanom sistemu. Ove promene su utvrđene difraktometrijskom analizom, kao i PSA i DTA metodom., In this paper the effects of mechanical activation on structural and microstructural changes of the system MgO-Al2O3-SiO2-TiO2 were analyzed. It was confirmed that mechanical activation led to the homogenization of powder particles, the comminuting of particles, and after this period, the introduced energy was used to induce changes in the crystal structure, which resulted in the emergence of defects, initially on the surface of the crystal lattice, and then inside.",
publisher = "Beograd : Savez inženjera i tehničara Srbije",
journal = "Tehnika – Novi materijali",
title = "Uticaj mehaničke energije na komponente MgO-Al2O3-SiO2-TiO2 sistema",
pages = "329-333"
}

Mechanochemical synthesis Ba0.8Sr0.2TiO3

Kosanović, Darko; Filipović, Suzana; Mitrić, Miodrag; Marković, Smilja; Obradović, Nina; Maričić, Aleksa; Živojinović, Jelena; Ristić, Momčilo M.; Dukić, Milan

(Belgrade : Institute of Technical Sciences of SASA, 2011)

TY  - CONF
AU  - Kosanović, Darko
AU  - Filipović, Suzana
AU  - Mitrić, Miodrag
AU  - Marković, Smilja
AU  - Obradović, Nina
AU  - Maričić, Aleksa
AU  - Živojinović, Jelena
AU  - Ristić, Momčilo M.
AU  - Dukić, Milan
PY  - 2011
UR  - http://dais.sanu.ac.rs/123456789/631
AB  - Ba0.8Sr0.2TiO3 was prepared from the starting materials BaCO3, SrCO3 and TiO2 through solid state reaction. Mixture of these oxides was mechanically activated using a high-energy ball mill at different time intervals from 0 to 120 minutes. The crystal structure was determined by X-ray diffraction to obtain information about the composition of phase variation. It was observed that after 40 minutes occurred early synthesis Ba0.8Sr0.2TiO3. Particle size distribution along with scanning electron microscopy gave very useful information about powder morphology.
PB  - Belgrade : Institute of Technical Sciences of SASA
C3  - Program and the Book of Abstracts / Tenth Young Researchers' Conference Materials Science and Engineering, December 21-23, 2011, Belgrade, Serbia
T1  - Mechanochemical synthesis Ba0.8Sr0.2TiO3
SP  - 13
EP  - 13
ER  - 
@conference{
author = "Kosanović, Darko and Filipović, Suzana and Mitrić, Miodrag and Marković, Smilja and Obradović, Nina and Maričić, Aleksa and Živojinović, Jelena and Ristić, Momčilo M. and Dukić, Milan",
year = "2011",
url = "http://dais.sanu.ac.rs/123456789/631",
abstract = "Ba0.8Sr0.2TiO3 was prepared from the starting materials BaCO3, SrCO3 and TiO2 through solid state reaction. Mixture of these oxides was mechanically activated using a high-energy ball mill at different time intervals from 0 to 120 minutes. The crystal structure was determined by X-ray diffraction to obtain information about the composition of phase variation. It was observed that after 40 minutes occurred early synthesis Ba0.8Sr0.2TiO3. Particle size distribution along with scanning electron microscopy gave very useful information about powder morphology.",
publisher = "Belgrade : Institute of Technical Sciences of SASA",
journal = "Program and the Book of Abstracts / Tenth Young Researchers' Conference Materials Science and Engineering, December 21-23, 2011, Belgrade, Serbia",
title = "Mechanochemical synthesis Ba0.8Sr0.2TiO3",
pages = "13-13"
}