TY  - CONF
AU  - Rakić, Jelena
AU  - Baščarević, Zvezdana
PY  - 2023
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/2024
AB  - Fly ash (FA), a by-product of coal combustion in thermal power plants, has been widely used in construction industry as partial replacement for Portland cement (PC). Due to environmental protection requirements, it became an imperative to increase the replacement rate of FA. Use of high volume fly ash (HVFA) binders, in which more than 50% of PC is replaced by FA, brings many ecological benefits (reduced pollution and energy consumption related to PC production, reduced waste generation, and preservation of natural resources). However, an increase of FA content in a binder can cause worsening of some of the properties of the binder, and reduction of early compressive strength and prolongation of setting time are of the greatest concern. These properties of HVFA binders can be improved by chemical activation of the binder. In this paper, three selected inorganic activators (Na2SO4, Na2CO3, and Na2SiO3) were used for chemical activation of HVFA binder (70 mas.% of FA and 30 mas.% PC). FA was mechanically activated prior to binder synthesis. Effects of the activators on the hydration of the HVFA binders were examined by isothermal calorimetry, X-ray diffraction, and thermogravimetric analyses. Influence of the chemical activation on the properties of the HVFA binders was analyzed by determination of setting time and compressive strength. The results showed that the chemical activators used in this work accelerated reactions of both PC and FA, which lead to shortened setting times and increased early compressive strength of the binders. The HVFA binder synthesized with sodium silicate as chemical activator had the best properties.
PB  - Institut za multidisciplinarna istraživanja
C3  - 7th Conference of The Serbian Society for Ceramic Materials, 7CSCS-2023, June 14-16, 2023, Belgrade, Serbia
T1  - Chemical activation of high volume fly ash binders by selected sodium salts
SP  - 69
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_2024
ER  - 

@conference{
author = "Rakić, Jelena and Baščarević, Zvezdana",
year = "2023",
abstract = "Fly ash (FA), a by-product of coal combustion in thermal power plants, has been widely used in construction industry as partial replacement for Portland cement (PC). Due to environmental protection requirements, it became an imperative to increase the replacement rate of FA. Use of high volume fly ash (HVFA) binders, in which more than 50% of PC is replaced by FA, brings many ecological benefits (reduced pollution and energy consumption related to PC production, reduced waste generation, and preservation of natural resources). However, an increase of FA content in a binder can cause worsening of some of the properties of the binder, and reduction of early compressive strength and prolongation of setting time are of the greatest concern. These properties of HVFA binders can be improved by chemical activation of the binder. In this paper, three selected inorganic activators (Na2SO4, Na2CO3, and Na2SiO3) were used for chemical activation of HVFA binder (70 mas.% of FA and 30 mas.% PC). FA was mechanically activated prior to binder synthesis. Effects of the activators on the hydration of the HVFA binders were examined by isothermal calorimetry, X-ray diffraction, and thermogravimetric analyses. Influence of the chemical activation on the properties of the HVFA binders was analyzed by determination of setting time and compressive strength. The results showed that the chemical activators used in this work accelerated reactions of both PC and FA, which lead to shortened setting times and increased early compressive strength of the binders. The HVFA binder synthesized with sodium silicate as chemical activator had the best properties.",
publisher = "Institut za multidisciplinarna istraživanja",
journal = "7th Conference of The Serbian Society for Ceramic Materials, 7CSCS-2023, June 14-16, 2023, Belgrade, Serbia",
title = "Chemical activation of high volume fly ash binders by selected sodium salts",
pages = "69",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_2024"
}

Rakić, J.,& Baščarević, Z.. (2023). Chemical activation of high volume fly ash binders by selected sodium salts. in 7th Conference of The Serbian Society for Ceramic Materials, 7CSCS-2023, June 14-16, 2023, Belgrade, Serbia
Institut za multidisciplinarna istraživanja., 69.
https://hdl.handle.net/21.15107/rcub_rimsi_2024

Rakić J, Baščarević Z. Chemical activation of high volume fly ash binders by selected sodium salts. in 7th Conference of The Serbian Society for Ceramic Materials, 7CSCS-2023, June 14-16, 2023, Belgrade, Serbia. 2023;:69.
https://hdl.handle.net/21.15107/rcub_rimsi_2024 .

Rakić, Jelena, Baščarević, Zvezdana, "Chemical activation of high volume fly ash binders by selected sodium salts" in 7th Conference of The Serbian Society for Ceramic Materials, 7CSCS-2023, June 14-16, 2023, Belgrade, Serbia (2023):69,
https://hdl.handle.net/21.15107/rcub_rimsi_2024 .

TY  - CONF
AU  - Kokunesoski, Maja
AU  - Saponjic, Aleksandra
AU  - Baščarević, Zvezdana
AU  - Jovanović, Ivan
AU  - Filipovic Trickovic, Jelena
AU  - Valenta Šobot, Ana
PY  - 2023
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/3041
AB  - Material SBA-15 with all of its particles in the form of regular spheres was synthesised by template method using Pluronic P123 (non-ionic triblock copolymer) as a surfactant and tetraethoxysilane (TEOS, 98%) as a source of silica. The synthesis of spherical SBA-15 was carried out in acidic conditions according to method proposed by Zhao et al. Instead of expensive commercial cetyltrimethylammonium bromide as a co-surfactant, a spent HCl solution obtained after the chemical treatment of clay in an aqueous solution of HCl was used. The mixture was aged at a higher temperature. After that, the spherical SBA-15 was made by drying at room temperature after washing with distilled water and then calcining in flowing air to decompose the triblock copolymer. The continual presence of spheres of diameters around 2 μm in the entire SBA-15 was confirmed by scanning electron microscopy. The Energy-dispersive X-ray spectroscopy confirmed that the spheres consisted only of SiO2 in composition. In addition, X-ray diffraction and Fourier-transform infrared spectroscopy methods were used to characterise SBA-15 material. To assess the cytotoxic effects of newly synthesised SBA-15 material, HEK 293 cells were treated with particles and extracts obtained from particles incubated 24 hours at 37 °C in serum-free DMEM medium and DMEM with 10% serum. Cells were treated with concentrations of 100, 250, and 500 µg/mL for 72 hours. All treatments reduced cell viability in a concentration dependent manner (p<0.001). Cytotoxicity was more pronounced in particle treatment, indicating that mechanical damage was induced in cells, whereas the extraction process influences the level of toxicity since the sera-free medium had the mildest effect. To acquire safe particles for human use, additional synthesis optimisation is required.
PB  - Association of Metallurgical Engineers of Serbia (AMES)
C3  - MME SEE : 5th Metallurgical and Materials Engineering Congress of South-East Europe : book of abstracts; June 7-10, Trebinje, Bosnia and Herzegovina
T1  - Preliminary cytotoxicity testing of newly synthesised SBA-15 material
EP  - 60
SP  - 60
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_3041
ER  - 

@conference{
author = "Kokunesoski, Maja and Saponjic, Aleksandra and Baščarević, Zvezdana and Jovanović, Ivan and Filipovic Trickovic, Jelena and Valenta Šobot, Ana",
year = "2023",
abstract = "Material SBA-15 with all of its particles in the form of regular spheres was synthesised by template method using Pluronic P123 (non-ionic triblock copolymer) as a surfactant and tetraethoxysilane (TEOS, 98%) as a source of silica. The synthesis of spherical SBA-15 was carried out in acidic conditions according to method proposed by Zhao et al. Instead of expensive commercial cetyltrimethylammonium bromide as a co-surfactant, a spent HCl solution obtained after the chemical treatment of clay in an aqueous solution of HCl was used. The mixture was aged at a higher temperature. After that, the spherical SBA-15 was made by drying at room temperature after washing with distilled water and then calcining in flowing air to decompose the triblock copolymer. The continual presence of spheres of diameters around 2 μm in the entire SBA-15 was confirmed by scanning electron microscopy. The Energy-dispersive X-ray spectroscopy confirmed that the spheres consisted only of SiO2 in composition. In addition, X-ray diffraction and Fourier-transform infrared spectroscopy methods were used to characterise SBA-15 material. To assess the cytotoxic effects of newly synthesised SBA-15 material, HEK 293 cells were treated with particles and extracts obtained from particles incubated 24 hours at 37 °C in serum-free DMEM medium and DMEM with 10% serum. Cells were treated with concentrations of 100, 250, and 500 µg/mL for 72 hours. All treatments reduced cell viability in a concentration dependent manner (p<0.001). Cytotoxicity was more pronounced in particle treatment, indicating that mechanical damage was induced in cells, whereas the extraction process influences the level of toxicity since the sera-free medium had the mildest effect. To acquire safe particles for human use, additional synthesis optimisation is required.",
publisher = "Association of Metallurgical Engineers of Serbia (AMES)",
journal = "MME SEE : 5th Metallurgical and Materials Engineering Congress of South-East Europe : book of abstracts; June 7-10, Trebinje, Bosnia and Herzegovina",
title = "Preliminary cytotoxicity testing of newly synthesised SBA-15 material",
pages = "60-60",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_3041"
}

Kokunesoski, M., Saponjic, A., Baščarević, Z., Jovanović, I., Filipovic Trickovic, J.,& Valenta Šobot, A.. (2023). Preliminary cytotoxicity testing of newly synthesised SBA-15 material. in MME SEE : 5th Metallurgical and Materials Engineering Congress of South-East Europe : book of abstracts; June 7-10, Trebinje, Bosnia and Herzegovina
Association of Metallurgical Engineers of Serbia (AMES)., 60-60.
https://hdl.handle.net/21.15107/rcub_rimsi_3041

Kokunesoski M, Saponjic A, Baščarević Z, Jovanović I, Filipovic Trickovic J, Valenta Šobot A. Preliminary cytotoxicity testing of newly synthesised SBA-15 material. in MME SEE : 5th Metallurgical and Materials Engineering Congress of South-East Europe : book of abstracts; June 7-10, Trebinje, Bosnia and Herzegovina. 2023;:60-60.
https://hdl.handle.net/21.15107/rcub_rimsi_3041 .

Kokunesoski, Maja, Saponjic, Aleksandra, Baščarević, Zvezdana, Jovanović, Ivan, Filipovic Trickovic, Jelena, Valenta Šobot, Ana, "Preliminary cytotoxicity testing of newly synthesised SBA-15 material" in MME SEE : 5th Metallurgical and Materials Engineering Congress of South-East Europe : book of abstracts; June 7-10, Trebinje, Bosnia and Herzegovina (2023):60-60,
https://hdl.handle.net/21.15107/rcub_rimsi_3041 .

TY  - JOUR
AU  - Gajić, Aleksa
AU  - Matić, Tamara
AU  - Obradović, Nataša
AU  - Baščarević, Zvezdana
AU  - Veljović, Đorđe
PY  - 2023
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/2979
AB  - Limited bone bank capacity and risk of infection are some of the main drawbacks of autologous and allogenic grafts, giving rise to synthetic materials for bone tissue implants. The aim of this study was to process and evaluate the mechanical properties and bioactivity of magnesium and strontium doped hydroxyapatite (HAp) scaffolds and investigate the effect of adding zirconium oxide and gelatine coating the scaffolds. Doped nanosized hydroxyapatite powder was synthesized by the hydrothermal method and the scaffolds were made by the foam replica technique and sintered at different temperatures. Yttria-stabilized zirconium oxide (YSZ), synthesized by plasma technology, was used as reinforcement of calcium phosphate scaffolds. Element analysis, phase composition, morphology of the powders and microstructure of the scaffolds were investigated, as well as the compressive strength of the coated and uncoated scaffolds and bioactivity in simulated body fluid (SBF). A microporous structure was achieved with interconnected pores and bioactivity in SBF was confirmed in all cases. The best mechanical properties were given by the coated composite HAp/YSZ scaffolds, withstanding average stresses of over 1019 kPa. These results encourage the idea of use of these scaffolds in bone regenerative therapy and bone tissue engineering.
T2  - Science of Sintering
T1  - Processing of gelatine coated composite scaffolds based on magnesium and strontium doped hydroxyapatite and yttria-stabilized zirconium oxide
DO  - 10.2298/SOS220723019G
ER  - 

@article{
author = "Gajić, Aleksa and Matić, Tamara and Obradović, Nataša and Baščarević, Zvezdana and Veljović, Đorđe",
year = "2023",
abstract = "Limited bone bank capacity and risk of infection are some of the main drawbacks of autologous and allogenic grafts, giving rise to synthetic materials for bone tissue implants. The aim of this study was to process and evaluate the mechanical properties and bioactivity of magnesium and strontium doped hydroxyapatite (HAp) scaffolds and investigate the effect of adding zirconium oxide and gelatine coating the scaffolds. Doped nanosized hydroxyapatite powder was synthesized by the hydrothermal method and the scaffolds were made by the foam replica technique and sintered at different temperatures. Yttria-stabilized zirconium oxide (YSZ), synthesized by plasma technology, was used as reinforcement of calcium phosphate scaffolds. Element analysis, phase composition, morphology of the powders and microstructure of the scaffolds were investigated, as well as the compressive strength of the coated and uncoated scaffolds and bioactivity in simulated body fluid (SBF). A microporous structure was achieved with interconnected pores and bioactivity in SBF was confirmed in all cases. The best mechanical properties were given by the coated composite HAp/YSZ scaffolds, withstanding average stresses of over 1019 kPa. These results encourage the idea of use of these scaffolds in bone regenerative therapy and bone tissue engineering.",
journal = "Science of Sintering",
title = "Processing of gelatine coated composite scaffolds based on magnesium and strontium doped hydroxyapatite and yttria-stabilized zirconium oxide",
doi = "10.2298/SOS220723019G"
}

Gajić, A., Matić, T., Obradović, N., Baščarević, Z.,& Veljović, Đ.. (2023). Processing of gelatine coated composite scaffolds based on magnesium and strontium doped hydroxyapatite and yttria-stabilized zirconium oxide. in Science of Sintering.
https://doi.org/10.2298/SOS220723019G

Gajić A, Matić T, Obradović N, Baščarević Z, Veljović Đ. Processing of gelatine coated composite scaffolds based on magnesium and strontium doped hydroxyapatite and yttria-stabilized zirconium oxide. in Science of Sintering. 2023;.
doi:10.2298/SOS220723019G .

Gajić, Aleksa, Matić, Tamara, Obradović, Nataša, Baščarević, Zvezdana, Veljović, Đorđe, "Processing of gelatine coated composite scaffolds based on magnesium and strontium doped hydroxyapatite and yttria-stabilized zirconium oxide" in Science of Sintering (2023),
https://doi.org/10.2298/SOS220723019G . .

TY  - CONF
AU  - Džunuzović, Nataša
AU  - Komljenović, Miroslav M
AU  - Nikolić, Violeta
AU  - Baščarević, Zvezdana
PY  - 2023
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/2439
AB  - Over the past few decades a new group of binding materials, geopolymers, have
emerged as an alternative to traditional binding materials such as Portland cement.
Geopolymers are obtained by the process of alkali activation of various alumino-
silicate materials, both natural and synthetic. Of particular importance is the
possibility of alkali activation of the industrial waste material such as fly ash. Fly
ash (FA) is generated in the process of coal combustion in thermal power plants. In
Serbia a small part of fly ash is recycled while the rest is landfilled, causing a
serious environmental pollution. Alkali activation represents a process by which fly
ash can safely be converted into a useful biding material, suitable for the
construction purposes. Geopolymers (or alkali-activated materials) based on fly ash
are known for their good compressive strength and good durability in aggressive
environments, when propeerly designed. However, the limiting factor for wider use
of fly ash in the process of alkali activation and geopolymers synthesis is its low
reactivity and consequent low compressive strength of binding elements. Our
research has shown that the reactivity of fly ash in the process of alkali activation
can be enhanced by the appropriate choice of the reaction conditions – by
mechanical activation of fly ash and by blending with more reactive material such as
blast furnace slag (BFS). Both options were explored in this paper and comparison
was performed. Mechanical activation of fly ash was conducted in a planetary ball
mill, while blends of fly ash and blast furnace slag were prepared with different
ratios (FA/(FA+BFS) = 1; 0,75; 0,50; 0,25; 0). Alkali activation was carried out at
95ºC by use of sodium silicate solution as an activator. In both cases significant
increase of geopolymer compressive strength was observed in respect to the
geopolymer based on the initial fly ash. Optimal geopolymer strength was correlated
with the chemical composition of the binding gel. Empirical values of optimal gel
composition could serve as a basis for tailoring properties of alkali-activated binders
based on different precursors. Both alkali-activated systems represent promissing
routes for geopolymer technology development.
PB  - Institut za multidisciplinarna istraņivanja Kneza Vińeslava 1, 11000 Belgrade, Serbia
C3  - 7th Conference of The Serbian Society for Ceramic Materials
T1  - ENHANCING THE REACTIVITY OF THE INDUSTRIAL FLY ASH IN THE PROCESS OF ALKALI ACTIVATION
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_2439
ER  - 

@conference{
author = "Džunuzović, Nataša and Komljenović, Miroslav M and Nikolić, Violeta and Baščarević, Zvezdana",
year = "2023",
abstract = "Over the past few decades a new group of binding materials, geopolymers, have
emerged as an alternative to traditional binding materials such as Portland cement.
Geopolymers are obtained by the process of alkali activation of various alumino-
silicate materials, both natural and synthetic. Of particular importance is the
possibility of alkali activation of the industrial waste material such as fly ash. Fly
ash (FA) is generated in the process of coal combustion in thermal power plants. In
Serbia a small part of fly ash is recycled while the rest is landfilled, causing a
serious environmental pollution. Alkali activation represents a process by which fly
ash can safely be converted into a useful biding material, suitable for the
construction purposes. Geopolymers (or alkali-activated materials) based on fly ash
are known for their good compressive strength and good durability in aggressive
environments, when propeerly designed. However, the limiting factor for wider use
of fly ash in the process of alkali activation and geopolymers synthesis is its low
reactivity and consequent low compressive strength of binding elements. Our
research has shown that the reactivity of fly ash in the process of alkali activation
can be enhanced by the appropriate choice of the reaction conditions – by
mechanical activation of fly ash and by blending with more reactive material such as
blast furnace slag (BFS). Both options were explored in this paper and comparison
was performed. Mechanical activation of fly ash was conducted in a planetary ball
mill, while blends of fly ash and blast furnace slag were prepared with different
ratios (FA/(FA+BFS) = 1; 0,75; 0,50; 0,25; 0). Alkali activation was carried out at
95ºC by use of sodium silicate solution as an activator. In both cases significant
increase of geopolymer compressive strength was observed in respect to the
geopolymer based on the initial fly ash. Optimal geopolymer strength was correlated
with the chemical composition of the binding gel. Empirical values of optimal gel
composition could serve as a basis for tailoring properties of alkali-activated binders
based on different precursors. Both alkali-activated systems represent promissing
routes for geopolymer technology development.",
publisher = "Institut za multidisciplinarna istraņivanja Kneza Vińeslava 1, 11000 Belgrade, Serbia",
journal = "7th Conference of The Serbian Society for Ceramic Materials",
title = "ENHANCING THE REACTIVITY OF THE INDUSTRIAL FLY ASH IN THE PROCESS OF ALKALI ACTIVATION",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_2439"
}

Džunuzović, N., Komljenović, M. M., Nikolić, V.,& Baščarević, Z.. (2023). ENHANCING THE REACTIVITY OF THE INDUSTRIAL FLY ASH IN THE PROCESS OF ALKALI ACTIVATION. in 7th Conference of The Serbian Society for Ceramic Materials
Institut za multidisciplinarna istraņivanja Kneza Vińeslava 1, 11000 Belgrade, Serbia..
https://hdl.handle.net/21.15107/rcub_rimsi_2439

Džunuzović N, Komljenović MM, Nikolić V, Baščarević Z. ENHANCING THE REACTIVITY OF THE INDUSTRIAL FLY ASH IN THE PROCESS OF ALKALI ACTIVATION. in 7th Conference of The Serbian Society for Ceramic Materials. 2023;.
https://hdl.handle.net/21.15107/rcub_rimsi_2439 .

Džunuzović, Nataša, Komljenović, Miroslav M, Nikolić, Violeta, Baščarević, Zvezdana, "ENHANCING THE REACTIVITY OF THE INDUSTRIAL FLY ASH IN THE PROCESS OF ALKALI ACTIVATION" in 7th Conference of The Serbian Society for Ceramic Materials (2023),
https://hdl.handle.net/21.15107/rcub_rimsi_2439 .

TY  - JOUR
AU  - Rakić, Jelena
AU  - Petrović, Rada
AU  - Radojevic, Vesna
AU  - Baščarević, Zvezdana
PY  - 2023
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/2129
AB  - Effects of Na2SO4, Na2CO3, and Na2SiO3 on setting time, compressive strength (up to 90 days), and hydration mechanism of binders with high volume (70 wt%, HVFA binders) of fly ash (FA) were investigated. Before chemical activation, FA was mechanically activated. Effects of the activators on hydration process were examined by isothermal calorimetry, X-ray diffraction and thermogravimetric analyses, and scanning electron microscopy. Pore solution analyses were also performed. It was found that, with addition of the chemical activators, Portland cement (PC) hydration was accelerated and the pozzolanic reaction started earlier, which resulted in shortening of setting time and increase in early compressive strength of the HVFA binders. Combination of mechanical activation of FA and the chemical activation by sodium silicate proved to be the best choice for synthesis of HVFA binder with good physicomechanical properties.
PB  - Elsevier Ltd.
T2  - Construction and Building Materials
T1  - Effects of selected inorganic chemical activators on properties and hydration mechanism of high volume fly ash (HVFA) binders
VL  - 391
DO  - 10.1016/j.conbuildmat.2023.131833
ER  - 

@article{
author = "Rakić, Jelena and Petrović, Rada and Radojevic, Vesna and Baščarević, Zvezdana",
year = "2023",
abstract = "Effects of Na2SO4, Na2CO3, and Na2SiO3 on setting time, compressive strength (up to 90 days), and hydration mechanism of binders with high volume (70 wt%, HVFA binders) of fly ash (FA) were investigated. Before chemical activation, FA was mechanically activated. Effects of the activators on hydration process were examined by isothermal calorimetry, X-ray diffraction and thermogravimetric analyses, and scanning electron microscopy. Pore solution analyses were also performed. It was found that, with addition of the chemical activators, Portland cement (PC) hydration was accelerated and the pozzolanic reaction started earlier, which resulted in shortening of setting time and increase in early compressive strength of the HVFA binders. Combination of mechanical activation of FA and the chemical activation by sodium silicate proved to be the best choice for synthesis of HVFA binder with good physicomechanical properties.",
publisher = "Elsevier Ltd.",
journal = "Construction and Building Materials",
title = "Effects of selected inorganic chemical activators on properties and hydration mechanism of high volume fly ash (HVFA) binders",
volume = "391",
doi = "10.1016/j.conbuildmat.2023.131833"
}

Rakić, J., Petrović, R., Radojevic, V.,& Baščarević, Z.. (2023). Effects of selected inorganic chemical activators on properties and hydration mechanism of high volume fly ash (HVFA) binders. in Construction and Building Materials
Elsevier Ltd.., 391.
https://doi.org/10.1016/j.conbuildmat.2023.131833

Rakić J, Petrović R, Radojevic V, Baščarević Z. Effects of selected inorganic chemical activators on properties and hydration mechanism of high volume fly ash (HVFA) binders. in Construction and Building Materials. 2023;391.
doi:10.1016/j.conbuildmat.2023.131833 .

Rakić, Jelena, Petrović, Rada, Radojevic, Vesna, Baščarević, Zvezdana, "Effects of selected inorganic chemical activators on properties and hydration mechanism of high volume fly ash (HVFA) binders" in Construction and Building Materials, 391 (2023),
https://doi.org/10.1016/j.conbuildmat.2023.131833 . .

TY  - CONF
AU  - Baščarević, Zvezdana
AU  - Rakić, Jelena
PY  - 2023
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/2023
AB  - Fly ash (FA), a by-product from thermal power plants, has been used for decades as Portland cement replacement material. Recently, additional efforts have been made by scientist and engineers worldwide with an aim to increase, as much as possible, content of FA in a binder, thus reduce negative environmental and economic impacts of the power and cement production. Furthermore, extensive work is being done on evaluating properties of the new binders, with a goal to ensure their wider use. 
This work analyzes durability of the high volume FA binders (HVFA, ≥ 50 mass% of FA in a binder). In order to increase FA content and improve properties of the HVFA binders, FA was mechanically activated and a chemical activator was used for the binder synthesis. Freeze-thaw, carbonation and sulfate attack resistance of the binders were analyzed. It was found that the freeze-thaw resistance of the HVFA binder was in accordance with the standard requirements. Carbonation depth after 56 days of testing of the HVFA binder was 7.3–8.1 mm, and an increase in the compressive strength of the mortar was observed. Studying of the sulfate attack on the HVFA binder showed that the resistance of the FA based binder was good, and even superior to the performance of the Portland composite cement CEM II 42.5N, tested under the same conditions and used for comparison. The obtained results indicated that the HVFA binders can be used for applications where moderate compressive strength and good durability of the binder is needed.
PB  - Institut za multidisciplinarna istraživanja
C3  - 7th Conference of The Serbian Society for Ceramic Materials, 7CSCS-2023, June 14-16, 2023, Belgrade, Serbia
T1  - Durability of high volume fly ash binders
EP  - 69
SP  - 68
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_2023
ER  - 

@conference{
author = "Baščarević, Zvezdana and Rakić, Jelena",
year = "2023",
abstract = "Fly ash (FA), a by-product from thermal power plants, has been used for decades as Portland cement replacement material. Recently, additional efforts have been made by scientist and engineers worldwide with an aim to increase, as much as possible, content of FA in a binder, thus reduce negative environmental and economic impacts of the power and cement production. Furthermore, extensive work is being done on evaluating properties of the new binders, with a goal to ensure their wider use. 
This work analyzes durability of the high volume FA binders (HVFA, ≥ 50 mass% of FA in a binder). In order to increase FA content and improve properties of the HVFA binders, FA was mechanically activated and a chemical activator was used for the binder synthesis. Freeze-thaw, carbonation and sulfate attack resistance of the binders were analyzed. It was found that the freeze-thaw resistance of the HVFA binder was in accordance with the standard requirements. Carbonation depth after 56 days of testing of the HVFA binder was 7.3–8.1 mm, and an increase in the compressive strength of the mortar was observed. Studying of the sulfate attack on the HVFA binder showed that the resistance of the FA based binder was good, and even superior to the performance of the Portland composite cement CEM II 42.5N, tested under the same conditions and used for comparison. The obtained results indicated that the HVFA binders can be used for applications where moderate compressive strength and good durability of the binder is needed.",
publisher = "Institut za multidisciplinarna istraživanja",
journal = "7th Conference of The Serbian Society for Ceramic Materials, 7CSCS-2023, June 14-16, 2023, Belgrade, Serbia",
title = "Durability of high volume fly ash binders",
pages = "69-68",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_2023"
}

Baščarević, Z.,& Rakić, J.. (2023). Durability of high volume fly ash binders. in 7th Conference of The Serbian Society for Ceramic Materials, 7CSCS-2023, June 14-16, 2023, Belgrade, Serbia
Institut za multidisciplinarna istraživanja., 68-69.
https://hdl.handle.net/21.15107/rcub_rimsi_2023

Baščarević Z, Rakić J. Durability of high volume fly ash binders. in 7th Conference of The Serbian Society for Ceramic Materials, 7CSCS-2023, June 14-16, 2023, Belgrade, Serbia. 2023;:68-69.
https://hdl.handle.net/21.15107/rcub_rimsi_2023 .

Baščarević, Zvezdana, Rakić, Jelena, "Durability of high volume fly ash binders" in 7th Conference of The Serbian Society for Ceramic Materials, 7CSCS-2023, June 14-16, 2023, Belgrade, Serbia (2023):68-69,
https://hdl.handle.net/21.15107/rcub_rimsi_2023 .

TY  - JOUR
AU  - Rakić, Jelena
AU  - Baščarević, Zvezdana
PY  - 2023
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1743
AB  - One of the measures to reduce the carbon footprint of the Portland cement (PC) manufacturing process is through a wider use of supplementary cementitious and waste materials. The main objective of this work was to produce a new binder using two different waste materials: fly ash FA) from thermal power plants and spent fluid catalytic cracking catalyst (sFCCC) from petrol refineries. In order to improve their reactivity, both FA and sFCCC were mechanically activated prior to the preparation of the binder. The new binder consisted mostly of the waste materials (70 mass %), with PC as a minor component (30 mass %). It was found that using sFCCC as the binder component accelerated cement hydration and the pozzolanic reaction. The new binder had a shorter setting time and a higher early strength than the binder prepared without sFCCC.
PB  - MDPI
T2  - Materials Proceedings
T1  - Influence of Spent Fluid Catalytic Cracking Catalyst on the Properties of the New Binder Based on Fly Ash and Portland Cement
IS  - 1
SP  - 8
VL  - 13
DO  - 10.3390/materproc2023013008
ER  - 

@article{
author = "Rakić, Jelena and Baščarević, Zvezdana",
year = "2023",
abstract = "One of the measures to reduce the carbon footprint of the Portland cement (PC) manufacturing process is through a wider use of supplementary cementitious and waste materials. The main objective of this work was to produce a new binder using two different waste materials: fly ash FA) from thermal power plants and spent fluid catalytic cracking catalyst (sFCCC) from petrol refineries. In order to improve their reactivity, both FA and sFCCC were mechanically activated prior to the preparation of the binder. The new binder consisted mostly of the waste materials (70 mass %), with PC as a minor component (30 mass %). It was found that using sFCCC as the binder component accelerated cement hydration and the pozzolanic reaction. The new binder had a shorter setting time and a higher early strength than the binder prepared without sFCCC.",
publisher = "MDPI",
journal = "Materials Proceedings",
title = "Influence of Spent Fluid Catalytic Cracking Catalyst on the Properties of the New Binder Based on Fly Ash and Portland Cement",
number = "1",
pages = "8",
volume = "13",
doi = "10.3390/materproc2023013008"
}

Rakić, J.,& Baščarević, Z.. (2023). Influence of Spent Fluid Catalytic Cracking Catalyst on the Properties of the New Binder Based on Fly Ash and Portland Cement. in Materials Proceedings
MDPI., 13(1), 8.
https://doi.org/10.3390/materproc2023013008

Rakić J, Baščarević Z. Influence of Spent Fluid Catalytic Cracking Catalyst on the Properties of the New Binder Based on Fly Ash and Portland Cement. in Materials Proceedings. 2023;13(1):8.
doi:10.3390/materproc2023013008 .

Rakić, Jelena, Baščarević, Zvezdana, "Influence of Spent Fluid Catalytic Cracking Catalyst on the Properties of the New Binder Based on Fly Ash and Portland Cement" in Materials Proceedings, 13, no. 1 (2023):8,
https://doi.org/10.3390/materproc2023013008 . .

TY  - CONF
AU  - Baščarević, Zvezdana
AU  - Rakić, Jelena
AU  - Petrović, Rada
PY  - 2022
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1735
AB  - Geopolymers are class of alkali activated materials obtained by alkali activation of aluminosilicate precursors. The main product of alkali activation reaction is amorphous aluminosilicate, “geopolymer” gel. Due to highly interconnected, threedimensional structure of aluminosilicate gel, geopolymers can show high compressive strength and good durability, and can be regarded as alternative to Portland cement in some applications. 
Spent catalyst from fluid catalytic cracking process (spent FCCC) is an inorganic by-product from petrol refineries. It consists mostly of zeolite (usually faujasite) and amorphous aluminosilicate matrix, and SiO2 and Al2O3 make about 90 % of its chemical composition.
In this work, spent FCCC was used as a precursor for geopolymer synthesis. Prior to chemical activation, spent FCCC was ground in a planetary ball mill. Alkali activation was carried out using sodium silicate solutions with different SiO2/Na2O ratios. The reaction was performed at 65 °C for 24 h. Synthesized geopolymer paste
samples were analyzed using scanning electron microscopy and X-ray powder diffraction. The results showed that alkali activation of the spent FCCC sample converted zeolitic phase to aluminosilicate geopolymer gel. Determination of the mechanical properties of the synthesized geopolymer mortar samples indicated that using the optimal modulus of the activating solution can produce geopolymers with compressive strength higher than 70 MPa. The obtained results confirmed potential to use spent FCCC as starting material for geopolymer production.
PB  - Institut za multidisciplinarna istraživanja
C3  - 6th Conference of The Serbian Society for Ceramic Materials, 6CSCS-2022, June 28-29, 2022, Belgrade, Serbia
T1  - Synthesis of geopolymers based on spent catalyst from petrol refineries
SP  - 90
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_1735
ER  - 

@conference{
author = "Baščarević, Zvezdana and Rakić, Jelena and Petrović, Rada",
year = "2022",
abstract = "Geopolymers are class of alkali activated materials obtained by alkali activation of aluminosilicate precursors. The main product of alkali activation reaction is amorphous aluminosilicate, “geopolymer” gel. Due to highly interconnected, threedimensional structure of aluminosilicate gel, geopolymers can show high compressive strength and good durability, and can be regarded as alternative to Portland cement in some applications. 
Spent catalyst from fluid catalytic cracking process (spent FCCC) is an inorganic by-product from petrol refineries. It consists mostly of zeolite (usually faujasite) and amorphous aluminosilicate matrix, and SiO2 and Al2O3 make about 90 % of its chemical composition.
In this work, spent FCCC was used as a precursor for geopolymer synthesis. Prior to chemical activation, spent FCCC was ground in a planetary ball mill. Alkali activation was carried out using sodium silicate solutions with different SiO2/Na2O ratios. The reaction was performed at 65 °C for 24 h. Synthesized geopolymer paste
samples were analyzed using scanning electron microscopy and X-ray powder diffraction. The results showed that alkali activation of the spent FCCC sample converted zeolitic phase to aluminosilicate geopolymer gel. Determination of the mechanical properties of the synthesized geopolymer mortar samples indicated that using the optimal modulus of the activating solution can produce geopolymers with compressive strength higher than 70 MPa. The obtained results confirmed potential to use spent FCCC as starting material for geopolymer production.",
publisher = "Institut za multidisciplinarna istraživanja",
journal = "6th Conference of The Serbian Society for Ceramic Materials, 6CSCS-2022, June 28-29, 2022, Belgrade, Serbia",
title = "Synthesis of geopolymers based on spent catalyst from petrol refineries",
pages = "90",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_1735"
}

Baščarević, Z., Rakić, J.,& Petrović, R.. (2022). Synthesis of geopolymers based on spent catalyst from petrol refineries. in 6th Conference of The Serbian Society for Ceramic Materials, 6CSCS-2022, June 28-29, 2022, Belgrade, Serbia
Institut za multidisciplinarna istraživanja., 90.
https://hdl.handle.net/21.15107/rcub_rimsi_1735

Baščarević Z, Rakić J, Petrović R. Synthesis of geopolymers based on spent catalyst from petrol refineries. in 6th Conference of The Serbian Society for Ceramic Materials, 6CSCS-2022, June 28-29, 2022, Belgrade, Serbia. 2022;:90.
https://hdl.handle.net/21.15107/rcub_rimsi_1735 .

Baščarević, Zvezdana, Rakić, Jelena, Petrović, Rada, "Synthesis of geopolymers based on spent catalyst from petrol refineries" in 6th Conference of The Serbian Society for Ceramic Materials, 6CSCS-2022, June 28-29, 2022, Belgrade, Serbia (2022):90,
https://hdl.handle.net/21.15107/rcub_rimsi_1735 .

TY  - CONF
AU  - Rakić, Jelena
AU  - Baščarević, Zvezdana
PY  - 2022
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1734
AB  - In this work, the effects of mechanical and chemical activation, as well as their combination, on the mechanical properties of high volume fly ash (HVFA) binders were investigated. Mechanical activation was conducted by grinding fly ash (FA) in a planetary ball mill. It resulted in drastic particle size reduction and increase in specific surface area of the FA. Morphology of FA particles, examined by scanning electron microscope, was also changed. The chemical activation was carried out by adding sodium sulfate to the dry mass of the binder. Effects of the activation methods on mechanical properties of the resulting binders were examined by determining setting time and compressive strength of HVFA mortars. The results showed that both activation methods lead to significant decrease in setting time and increase in early compressive strength, especially when combination of both of the activation methods was applied. Thus, properties of HVFA binders that have been limiting their use in the construction industry, i.e. long setting time and low early strength, were improved by using mechanical and chemical activation.
PB  - Institut za multidisciplinarna istraživanja
C3  - 6th Conference of The Serbian Society for Ceramic Materials, 6CSCS-2022, June 28-29, 2022, Belgrade, Serbia
T1  - Effect of two activation methods on mechanical properties of high volume fly ash binders
SP  - 89
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_1734
ER  - 

@conference{
author = "Rakić, Jelena and Baščarević, Zvezdana",
year = "2022",
abstract = "In this work, the effects of mechanical and chemical activation, as well as their combination, on the mechanical properties of high volume fly ash (HVFA) binders were investigated. Mechanical activation was conducted by grinding fly ash (FA) in a planetary ball mill. It resulted in drastic particle size reduction and increase in specific surface area of the FA. Morphology of FA particles, examined by scanning electron microscope, was also changed. The chemical activation was carried out by adding sodium sulfate to the dry mass of the binder. Effects of the activation methods on mechanical properties of the resulting binders were examined by determining setting time and compressive strength of HVFA mortars. The results showed that both activation methods lead to significant decrease in setting time and increase in early compressive strength, especially when combination of both of the activation methods was applied. Thus, properties of HVFA binders that have been limiting their use in the construction industry, i.e. long setting time and low early strength, were improved by using mechanical and chemical activation.",
publisher = "Institut za multidisciplinarna istraživanja",
journal = "6th Conference of The Serbian Society for Ceramic Materials, 6CSCS-2022, June 28-29, 2022, Belgrade, Serbia",
title = "Effect of two activation methods on mechanical properties of high volume fly ash binders",
pages = "89",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_1734"
}

Rakić, J.,& Baščarević, Z.. (2022). Effect of two activation methods on mechanical properties of high volume fly ash binders. in 6th Conference of The Serbian Society for Ceramic Materials, 6CSCS-2022, June 28-29, 2022, Belgrade, Serbia
Institut za multidisciplinarna istraživanja., 89.
https://hdl.handle.net/21.15107/rcub_rimsi_1734

Rakić J, Baščarević Z. Effect of two activation methods on mechanical properties of high volume fly ash binders. in 6th Conference of The Serbian Society for Ceramic Materials, 6CSCS-2022, June 28-29, 2022, Belgrade, Serbia. 2022;:89.
https://hdl.handle.net/21.15107/rcub_rimsi_1734 .

Rakić, Jelena, Baščarević, Zvezdana, "Effect of two activation methods on mechanical properties of high volume fly ash binders" in 6th Conference of The Serbian Society for Ceramic Materials, 6CSCS-2022, June 28-29, 2022, Belgrade, Serbia (2022):89,
https://hdl.handle.net/21.15107/rcub_rimsi_1734 .

TY  - CONF
AU  - Rakić, Jelena
AU  - Baščarević, Zvezdana
AU  - Petrović, Rada
PY  - 2022
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1739
AB  - The use of binders based on waste materials in construction industry has both ecological and
economic advantages over the use of commercial Portland cements (PC). Preserving the natural
resources needed for PC production, as well as reusing waste materials instead of disposing them in landfills, contributes significantly to the protection of the environment. Also, the price of waste
materials is usually much lower than the price of raw materials used for production of PC.
Coal combustion in thermal power plants produces huge amounts of fly ash (FA). It is estimated
that 500-750 million tonnes of FA are generated worldwide annually, with a global utilization rate
of only 25 %. Due to pozzolanic properties of this aluminosilicate waste material, FA has been
used as PC component for decades. However, the broad use of binders made of high volume of
FA (>50%) is limited by their relatively long setting time and low early strength.
The other waste material of interest in this work was fluid catalytic cracking catalyst residue
(FC3R), a by-product from petrol refineries, which primarily consists of zeolite and amorphous
aluminosilicates and also shows pozzolanic activity. Due to relatively small quantities of FC3R
produced (~160000 tonnes per year globally), landfilling is usually considered as the most
economical option for its disposal.
The aim of this work was to investigate the performance properties of ternary binder containing
high volume of the two different waste materials, FA and FC3R. The binder consisted of FA,
FC3R, and PC (commercial CEM I) mixed in a 49:21:30 mass ratio. Both waste materials were
mechanically activated prior to the binder synthesis. Characterization of raw and mechanically
activated waste materials via determination of particle size distribution, morphology and mineral
composition, was conducted. Analyses of the ternary binder properties showed that using FC3R
as the binder component resulted in acceleration of cement hydration and pozzolanic reaction. The
ternary binder had shorter setting time and higher early strength than the control binder
synthesized with 70 mass% of FA and 30 mass% of PC.
PB  - Materials Research Society of Serbia
C3  - Twenty-third Annual Conference YUCOMAT 2022 & Twelfth World Round Table Conference on Sintering XII WRTCS, Herceg Novi, Montenegro, August 29 - September 02, 2022
T1  - Performance of ternary cement binders containing high volume of fly ash and fluid catalytic cracking catalyst residue
SP  - 143
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_1739
ER  - 

@conference{
author = "Rakić, Jelena and Baščarević, Zvezdana and Petrović, Rada",
year = "2022",
abstract = "The use of binders based on waste materials in construction industry has both ecological and
economic advantages over the use of commercial Portland cements (PC). Preserving the natural
resources needed for PC production, as well as reusing waste materials instead of disposing them in landfills, contributes significantly to the protection of the environment. Also, the price of waste
materials is usually much lower than the price of raw materials used for production of PC.
Coal combustion in thermal power plants produces huge amounts of fly ash (FA). It is estimated
that 500-750 million tonnes of FA are generated worldwide annually, with a global utilization rate
of only 25 %. Due to pozzolanic properties of this aluminosilicate waste material, FA has been
used as PC component for decades. However, the broad use of binders made of high volume of
FA (>50%) is limited by their relatively long setting time and low early strength.
The other waste material of interest in this work was fluid catalytic cracking catalyst residue
(FC3R), a by-product from petrol refineries, which primarily consists of zeolite and amorphous
aluminosilicates and also shows pozzolanic activity. Due to relatively small quantities of FC3R
produced (~160000 tonnes per year globally), landfilling is usually considered as the most
economical option for its disposal.
The aim of this work was to investigate the performance properties of ternary binder containing
high volume of the two different waste materials, FA and FC3R. The binder consisted of FA,
FC3R, and PC (commercial CEM I) mixed in a 49:21:30 mass ratio. Both waste materials were
mechanically activated prior to the binder synthesis. Characterization of raw and mechanically
activated waste materials via determination of particle size distribution, morphology and mineral
composition, was conducted. Analyses of the ternary binder properties showed that using FC3R
as the binder component resulted in acceleration of cement hydration and pozzolanic reaction. The
ternary binder had shorter setting time and higher early strength than the control binder
synthesized with 70 mass% of FA and 30 mass% of PC.",
publisher = "Materials Research Society of Serbia",
journal = "Twenty-third Annual Conference YUCOMAT 2022 & Twelfth World Round Table Conference on Sintering XII WRTCS, Herceg Novi, Montenegro, August 29 - September 02, 2022",
title = "Performance of ternary cement binders containing high volume of fly ash and fluid catalytic cracking catalyst residue",
pages = "143",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_1739"
}

Rakić, J., Baščarević, Z.,& Petrović, R.. (2022). Performance of ternary cement binders containing high volume of fly ash and fluid catalytic cracking catalyst residue. in Twenty-third Annual Conference YUCOMAT 2022 & Twelfth World Round Table Conference on Sintering XII WRTCS, Herceg Novi, Montenegro, August 29 - September 02, 2022
Materials Research Society of Serbia., 143.
https://hdl.handle.net/21.15107/rcub_rimsi_1739

Rakić J, Baščarević Z, Petrović R. Performance of ternary cement binders containing high volume of fly ash and fluid catalytic cracking catalyst residue. in Twenty-third Annual Conference YUCOMAT 2022 & Twelfth World Round Table Conference on Sintering XII WRTCS, Herceg Novi, Montenegro, August 29 - September 02, 2022. 2022;:143.
https://hdl.handle.net/21.15107/rcub_rimsi_1739 .

Rakić, Jelena, Baščarević, Zvezdana, Petrović, Rada, "Performance of ternary cement binders containing high volume of fly ash and fluid catalytic cracking catalyst residue" in Twenty-third Annual Conference YUCOMAT 2022 & Twelfth World Round Table Conference on Sintering XII WRTCS, Herceg Novi, Montenegro, August 29 - September 02, 2022 (2022):143,
https://hdl.handle.net/21.15107/rcub_rimsi_1739 .

TY  - CONF
AU  - Matic, Tamara
AU  - Baščarević, Zvezdana
AU  - Janackovic, Djordje
AU  - Veljovic, Djordje
PY  - 2022
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1937
AB  - Bioceramic materials based on hydroxyapatite (HAP) are widely used as scaffolding material for bone tissue engineering due to their similarity with inorganic part of human bones. Magnesium ion as a dopant in hydroxyapatite was previously shown to improve mechanical properties of HAP based materials, as well as to improve osteoblasts cell proliferation, and induce angiogenesis which stimulate the bone regeneration.
Mesoporous bioactive glass nanoparticles (MBGNPs) present the latest generation of the sol-gel glasses, having high surface area and large pore volume that allow the loading of drugs (antiinflammatory, anti-osteoporotic, anti-cancer etc.) and growth factors for stimulating cell differentiation and proliferation. MBGNPs are highly soluble and more bioactive compared to the hydroxyapatite. However, their high porosity leads to poor mechanical properties of pure MBGNP-based scaffolds.
Here we propose composite scaffolds based on magnesium doped hydroxyapatite and MBGNPs obtained by a modified microemulsion-assisted sol-gel synthesis for bone tissue engineering application. Hydrothermally obtained hydroxyapatite doped with 5 mol. % of magnesium ions was calcinated at 1000 °C and mixed with 10-20 wt.% BGNPs to form composite scaffolds by sponge replica method. The addition of MBGNPs has the influence on the sinterability, mechanical properties and bioactivity of the scaffolds.
PB  - Materials Research Society of Serbia
C3  - Twenty-third Annual Conference YUCOMAT 2022 & Twelfth World Round Table Conference on Sintering XII WRTCS Program and the Book of Abstracts
T1  - Composite scaffolds based on magnesium doped hydroxyapatite and mesoporous nanosized bioactive glass
EP  - 167
SP  - 167
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_1937
ER  - 

@conference{
author = "Matic, Tamara and Baščarević, Zvezdana and Janackovic, Djordje and Veljovic, Djordje",
year = "2022",
abstract = "Bioceramic materials based on hydroxyapatite (HAP) are widely used as scaffolding material for bone tissue engineering due to their similarity with inorganic part of human bones. Magnesium ion as a dopant in hydroxyapatite was previously shown to improve mechanical properties of HAP based materials, as well as to improve osteoblasts cell proliferation, and induce angiogenesis which stimulate the bone regeneration.
Mesoporous bioactive glass nanoparticles (MBGNPs) present the latest generation of the sol-gel glasses, having high surface area and large pore volume that allow the loading of drugs (antiinflammatory, anti-osteoporotic, anti-cancer etc.) and growth factors for stimulating cell differentiation and proliferation. MBGNPs are highly soluble and more bioactive compared to the hydroxyapatite. However, their high porosity leads to poor mechanical properties of pure MBGNP-based scaffolds.
Here we propose composite scaffolds based on magnesium doped hydroxyapatite and MBGNPs obtained by a modified microemulsion-assisted sol-gel synthesis for bone tissue engineering application. Hydrothermally obtained hydroxyapatite doped with 5 mol. % of magnesium ions was calcinated at 1000 °C and mixed with 10-20 wt.% BGNPs to form composite scaffolds by sponge replica method. The addition of MBGNPs has the influence on the sinterability, mechanical properties and bioactivity of the scaffolds.",
publisher = "Materials Research Society of Serbia",
journal = "Twenty-third Annual Conference YUCOMAT 2022 & Twelfth World Round Table Conference on Sintering XII WRTCS Program and the Book of Abstracts",
title = "Composite scaffolds based on magnesium doped hydroxyapatite and mesoporous nanosized bioactive glass",
pages = "167-167",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_1937"
}

Matic, T., Baščarević, Z., Janackovic, D.,& Veljovic, D.. (2022). Composite scaffolds based on magnesium doped hydroxyapatite and mesoporous nanosized bioactive glass. in Twenty-third Annual Conference YUCOMAT 2022 & Twelfth World Round Table Conference on Sintering XII WRTCS Program and the Book of Abstracts
Materials Research Society of Serbia., 167-167.
https://hdl.handle.net/21.15107/rcub_rimsi_1937

Matic T, Baščarević Z, Janackovic D, Veljovic D. Composite scaffolds based on magnesium doped hydroxyapatite and mesoporous nanosized bioactive glass. in Twenty-third Annual Conference YUCOMAT 2022 & Twelfth World Round Table Conference on Sintering XII WRTCS Program and the Book of Abstracts. 2022;:167-167.
https://hdl.handle.net/21.15107/rcub_rimsi_1937 .

Matic, Tamara, Baščarević, Zvezdana, Janackovic, Djordje, Veljovic, Djordje, "Composite scaffolds based on magnesium doped hydroxyapatite and mesoporous nanosized bioactive glass" in Twenty-third Annual Conference YUCOMAT 2022 & Twelfth World Round Table Conference on Sintering XII WRTCS Program and the Book of Abstracts (2022):167-167,
https://hdl.handle.net/21.15107/rcub_rimsi_1937 .

TY  - JOUR
AU  - Omerašević, Mia
AU  - Baščarević, Zvezdana
AU  - Vujasin, Radojka
AU  - Devečerski, Aleksandar
AU  - Bučevac, Dušan
PY  - 2022
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1572
AB  - Anorthite ceramics was fabricated from calcium exchanged Na-LTA zeolite. The powder compacts of Ca-LTA zeolite were sintered at different temperatures ranging between 1100 and 1400°C. It was found that the temperature of 1100°C was sufficiently high to trigger formation of anorthite which stayed stable even at temperature as high as 1400°C. The highest relative density and the lowest open porosity were measured in samples sintered at 1200°C for 3 h. The effect of milling time of Ca-LTA zeolite precursor on density, microstructure and mechanical properties of samples sintered at 1200°C for 3 h was investigated. The particle size refinement appeared to be beneficial in accelerating densification process and improving mechanical properties. The density, compressive strength and hardness of anorthite ceramics obtained from non-milled precursor were measured to be 70.5 %TD, 64 MPa and 1.45 GPa, respectively. On the other side the anorthite ceramics obtained from 24-hour-long milled zeolite precursor had density of 83.9 %TD, compressive strength of 101 MPa and hardness of 3.44 GPa.
PB  - International Institute for the Science of Sintering
T2  - Science of Sintering
T1  - Effect of Milling Time on Mechanical Properties of Anorthite Obtained by Thermal Transformation of Ca-LTA Zeolite
EP  - 358
IS  - 3
SP  - 349
VL  - 54
DO  - 10.2298/SOS2203349O
ER  - 

@article{
author = "Omerašević, Mia and Baščarević, Zvezdana and Vujasin, Radojka and Devečerski, Aleksandar and Bučevac, Dušan",
year = "2022",
abstract = "Anorthite ceramics was fabricated from calcium exchanged Na-LTA zeolite. The powder compacts of Ca-LTA zeolite were sintered at different temperatures ranging between 1100 and 1400°C. It was found that the temperature of 1100°C was sufficiently high to trigger formation of anorthite which stayed stable even at temperature as high as 1400°C. The highest relative density and the lowest open porosity were measured in samples sintered at 1200°C for 3 h. The effect of milling time of Ca-LTA zeolite precursor on density, microstructure and mechanical properties of samples sintered at 1200°C for 3 h was investigated. The particle size refinement appeared to be beneficial in accelerating densification process and improving mechanical properties. The density, compressive strength and hardness of anorthite ceramics obtained from non-milled precursor were measured to be 70.5 %TD, 64 MPa and 1.45 GPa, respectively. On the other side the anorthite ceramics obtained from 24-hour-long milled zeolite precursor had density of 83.9 %TD, compressive strength of 101 MPa and hardness of 3.44 GPa.",
publisher = "International Institute for the Science of Sintering",
journal = "Science of Sintering",
title = "Effect of Milling Time on Mechanical Properties of Anorthite Obtained by Thermal Transformation of Ca-LTA Zeolite",
pages = "358-349",
number = "3",
volume = "54",
doi = "10.2298/SOS2203349O"
}

Omerašević, M., Baščarević, Z., Vujasin, R., Devečerski, A.,& Bučevac, D.. (2022). Effect of Milling Time on Mechanical Properties of Anorthite Obtained by Thermal Transformation of Ca-LTA Zeolite. in Science of Sintering
International Institute for the Science of Sintering., 54(3), 349-358.
https://doi.org/10.2298/SOS2203349O

Omerašević M, Baščarević Z, Vujasin R, Devečerski A, Bučevac D. Effect of Milling Time on Mechanical Properties of Anorthite Obtained by Thermal Transformation of Ca-LTA Zeolite. in Science of Sintering. 2022;54(3):349-358.
doi:10.2298/SOS2203349O .

Omerašević, Mia, Baščarević, Zvezdana, Vujasin, Radojka, Devečerski, Aleksandar, Bučevac, Dušan, "Effect of Milling Time on Mechanical Properties of Anorthite Obtained by Thermal Transformation of Ca-LTA Zeolite" in Science of Sintering, 54, no. 3 (2022):349-358,
https://doi.org/10.2298/SOS2203349O . .

TY  - JOUR
AU  - Saponjic, Aleksandra
AU  - Gyoshev, Stanislav
AU  - Baščarević, Zvezdana
AU  - Jankovic Mandic, Ljiljana
AU  - Ljubenov, Gorica
AU  - Kokunesoski, Maja
PY  - 2022
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1555
AB  - Diatomite (diatomaceous earth) and clay minerals deposits from the mining basin Kolubara, Serbia, are natural materials with high economic potential in many fields. As received and treated materials, diatomite and clay were characterized using X-ray diffraction, mercury intrusion porosimetry, particle size distribution, scanning electron microscopy, and Fourier-transform infrared spectroscopy. Activity concentrations for natural radionuclides 40K, 226Ra and 232Th and anthropogenic radionuclide 137Cs in diatomite and clay were determined by gamma spectrometry with HPGe detector. For diatomite and clay, the mean activity concentrations of 226Ra, 232Th and 40K were found to be 9, 26 and 173 Bq kg-1 and 19, 26 and 470 Bq kg-1, respectively. In the present study was to show that these materials are environmentally safe for further use in many fields.
PB  - International Institute for the Science of Sintering
T2  - Science of Sintering
T1  - Characterization of Sedimentary Minerals from Kolubara Mining Basin, Serbia, with the Determination of Natural Radioactivity
EP  - 48
SP  - 39
VL  - 54
DO  - 10.2298/SOS2201039S
ER  - 

@article{
author = "Saponjic, Aleksandra and Gyoshev, Stanislav and Baščarević, Zvezdana and Jankovic Mandic, Ljiljana and Ljubenov, Gorica and Kokunesoski, Maja",
year = "2022",
abstract = "Diatomite (diatomaceous earth) and clay minerals deposits from the mining basin Kolubara, Serbia, are natural materials with high economic potential in many fields. As received and treated materials, diatomite and clay were characterized using X-ray diffraction, mercury intrusion porosimetry, particle size distribution, scanning electron microscopy, and Fourier-transform infrared spectroscopy. Activity concentrations for natural radionuclides 40K, 226Ra and 232Th and anthropogenic radionuclide 137Cs in diatomite and clay were determined by gamma spectrometry with HPGe detector. For diatomite and clay, the mean activity concentrations of 226Ra, 232Th and 40K were found to be 9, 26 and 173 Bq kg-1 and 19, 26 and 470 Bq kg-1, respectively. In the present study was to show that these materials are environmentally safe for further use in many fields.",
publisher = "International Institute for the Science of Sintering",
journal = "Science of Sintering",
title = "Characterization of Sedimentary Minerals from Kolubara Mining Basin, Serbia, with the Determination of Natural Radioactivity",
pages = "48-39",
volume = "54",
doi = "10.2298/SOS2201039S"
}

Saponjic, A., Gyoshev, S., Baščarević, Z., Jankovic Mandic, L., Ljubenov, G.,& Kokunesoski, M.. (2022). Characterization of Sedimentary Minerals from Kolubara Mining Basin, Serbia, with the Determination of Natural Radioactivity. in Science of Sintering
International Institute for the Science of Sintering., 54, 39-48.
https://doi.org/10.2298/SOS2201039S

Saponjic A, Gyoshev S, Baščarević Z, Jankovic Mandic L, Ljubenov G, Kokunesoski M. Characterization of Sedimentary Minerals from Kolubara Mining Basin, Serbia, with the Determination of Natural Radioactivity. in Science of Sintering. 2022;54:39-48.
doi:10.2298/SOS2201039S .

Saponjic, Aleksandra, Gyoshev, Stanislav, Baščarević, Zvezdana, Jankovic Mandic, Ljiljana, Ljubenov, Gorica, Kokunesoski, Maja, "Characterization of Sedimentary Minerals from Kolubara Mining Basin, Serbia, with the Determination of Natural Radioactivity" in Science of Sintering, 54 (2022):39-48,
https://doi.org/10.2298/SOS2201039S . .

Rakić, J., Baščarević, Z.,& Carević, V.. (2021). Технолошки поступак синтезе везива отпорног на дејство мраза применом хемијски и механички активираног електрофилтерског пепела из термоелектране као полазног материјала за његову синтезу. .
https://hdl.handle.net/21.15107/rcub_rimsi_1956

Rakić J, Baščarević Z, Carević V. Технолошки поступак синтезе везива отпорног на дејство мраза применом хемијски и механички активираног електрофилтерског пепела из термоелектране као полазног материјала за његову синтезу. 2021;.
https://hdl.handle.net/21.15107/rcub_rimsi_1956 .

Rakić, Jelena, Baščarević, Zvezdana, Carević, Vedran, "Технолошки поступак синтезе везива отпорног на дејство мраза применом хемијски и механички активираног електрофилтерског пепела из термоелектране као полазног материјала за његову синтезу" (2021),
https://hdl.handle.net/21.15107/rcub_rimsi_1956 .

Rakić, J., Baščarević, Z.,& Petrović, R.. (2021). Композитно везиво на бази отпадног катализатора из процеса каталитичког крековања нафте и електрофилтерског пепела термоелектрана. .
https://hdl.handle.net/21.15107/rcub_rimsi_1952

Rakić J, Baščarević Z, Petrović R. Композитно везиво на бази отпадног катализатора из процеса каталитичког крековања нафте и електрофилтерског пепела термоелектрана. 2021;.
https://hdl.handle.net/21.15107/rcub_rimsi_1952 .

Rakić, Jelena, Baščarević, Zvezdana, Petrović, Rada, "Композитно везиво на бази отпадног катализатора из процеса каталитичког крековања нафте и електрофилтерског пепела термоелектрана" (2021),
https://hdl.handle.net/21.15107/rcub_rimsi_1952 .

Baščarević, Z., Rakić, J.,& Petrović, R.. (2021). Геополимер на бази отпадног катализатора из процеса каталитичког крековања нафте добијен применом раствора натријум-силиката као алкалног активатора. .
https://hdl.handle.net/21.15107/rcub_rimsi_1955

Baščarević Z, Rakić J, Petrović R. Геополимер на бази отпадног катализатора из процеса каталитичког крековања нафте добијен применом раствора натријум-силиката као алкалног активатора. 2021;.
https://hdl.handle.net/21.15107/rcub_rimsi_1955 .

Baščarević, Zvezdana, Rakić, Jelena, Petrović, Rada, "Геополимер на бази отпадног катализатора из процеса каталитичког крековања нафте добијен применом раствора натријум-силиката као алкалног активатора" (2021),
https://hdl.handle.net/21.15107/rcub_rimsi_1955 .

TY  - CONF
AU  - Kokunesoski, Maja
AU  - Gyoshev, Stanislav
AU  - Baščarević, Zvezdana
AU  - Ilic, Svetlana
AU  - Saponjic, Aleksandra
PY  - 2021
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1942
AB  - The clay minerals deposit from the mining basin Kolubara, Serbia, is a natural sediment material with high economic potential in many fields. The chemical composition of starting clay determined by inductively coupled plasma spectrometry shows that its main composition of SiO2 is 88.00 wt.%. Organic impurities from clay have been removed by heat treatment at 600 °C for 2 h in air. After thermal treatment, an aqueous solution of HCl sedimentary mineral was chemically treated. Surface properties of starting clay and thermally and chemically treated clay (treated clay) were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and particle size distribution method. The XRD analyses of the starting and treated clay confirmed that quartz is a significant phase, followed by the appearance of feldspar and smectite clays. The SEM method showed impressively layered microstructure on various magnifications for both groups of investigated materials. The average particle diameter value for starting clay was about 23 μm and about 53 μm for treated clay. These methods showed that the starting clay changed the surface properties during thermal and chemical treatment, resulting in the merging of clay layers.
PB  - Serbian Ceramic Society
C3  - Serbian Ceramic Society Conference - ADVANCED CERAMICS AND APPLICATION IX Program and the Book of Abstracts
T1  - Characterization of clay mineral from Kolubara mining basin, Serbia, with a determined layered structure
EP  - 67
SP  - 67
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_1942
ER  - 

@conference{
author = "Kokunesoski, Maja and Gyoshev, Stanislav and Baščarević, Zvezdana and Ilic, Svetlana and Saponjic, Aleksandra",
year = "2021",
abstract = "The clay minerals deposit from the mining basin Kolubara, Serbia, is a natural sediment material with high economic potential in many fields. The chemical composition of starting clay determined by inductively coupled plasma spectrometry shows that its main composition of SiO2 is 88.00 wt.%. Organic impurities from clay have been removed by heat treatment at 600 °C for 2 h in air. After thermal treatment, an aqueous solution of HCl sedimentary mineral was chemically treated. Surface properties of starting clay and thermally and chemically treated clay (treated clay) were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and particle size distribution method. The XRD analyses of the starting and treated clay confirmed that quartz is a significant phase, followed by the appearance of feldspar and smectite clays. The SEM method showed impressively layered microstructure on various magnifications for both groups of investigated materials. The average particle diameter value for starting clay was about 23 μm and about 53 μm for treated clay. These methods showed that the starting clay changed the surface properties during thermal and chemical treatment, resulting in the merging of clay layers.",
publisher = "Serbian Ceramic Society",
journal = "Serbian Ceramic Society Conference - ADVANCED CERAMICS AND APPLICATION IX Program and the Book of Abstracts",
title = "Characterization of clay mineral from Kolubara mining basin, Serbia, with a determined layered structure",
pages = "67-67",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_1942"
}

Kokunesoski, M., Gyoshev, S., Baščarević, Z., Ilic, S.,& Saponjic, A.. (2021). Characterization of clay mineral from Kolubara mining basin, Serbia, with a determined layered structure. in Serbian Ceramic Society Conference - ADVANCED CERAMICS AND APPLICATION IX Program and the Book of Abstracts
Serbian Ceramic Society., 67-67.
https://hdl.handle.net/21.15107/rcub_rimsi_1942

Kokunesoski M, Gyoshev S, Baščarević Z, Ilic S, Saponjic A. Characterization of clay mineral from Kolubara mining basin, Serbia, with a determined layered structure. in Serbian Ceramic Society Conference - ADVANCED CERAMICS AND APPLICATION IX Program and the Book of Abstracts. 2021;:67-67.
https://hdl.handle.net/21.15107/rcub_rimsi_1942 .

Kokunesoski, Maja, Gyoshev, Stanislav, Baščarević, Zvezdana, Ilic, Svetlana, Saponjic, Aleksandra, "Characterization of clay mineral from Kolubara mining basin, Serbia, with a determined layered structure" in Serbian Ceramic Society Conference - ADVANCED CERAMICS AND APPLICATION IX Program and the Book of Abstracts (2021):67-67,
https://hdl.handle.net/21.15107/rcub_rimsi_1942 .

TY  - CONF
AU  - Kokunesoski, Maja
AU  - Baščarević, Zvezdana
AU  - Ilic, Svetlana
AU  - Valenta Šobot, Ana
AU  - Grce, Ana
AU  - Pošarac-Marković, Milica
AU  - Saponjic, Aleksandra
PY  - 2021
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1939
AB  - The synthesis of SBA-15 material with spherical particles is performed by the template method by using only a surfactant Pluronic P123 under acidic conditions. In the synthesis of SBA-15 with spherical particles, an HCl solution was used after specialised chemical treatment of clay purification. The dominant presence of the spheres with diameters up to around 2 μm was confirmed by the scanning electron microscopy(SEM) method. In contrast, the Energy-dispersive X-ray spectroscopy(EDS) confirmed that the spheres consisted only of SiO2 in composition. In addition to the methods mentioned above, X-ray diffraction (XRD), and Fourier-transform infrared spectroscopy(FTIR) methods were used to characterise SBA-15 materials.  Application of HCl solution after chemical treatment of clay purification represents the application of technology in the synthesis of spherical SBA-15.
PB  - Serbian Ceramic Society
C3  - Serbian Ceramic Society Conference - ADVANCED CERAMICS AND APPLICATION IX Program and the Book of Abstracts
T1  - Synthesis of spherical SBA-15 silica particles without the use of additional cosurfactant
EP  - 66
SP  - 66
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_1939
ER  - 

@conference{
author = "Kokunesoski, Maja and Baščarević, Zvezdana and Ilic, Svetlana and Valenta Šobot, Ana and Grce, Ana and Pošarac-Marković, Milica and Saponjic, Aleksandra",
year = "2021",
abstract = "The synthesis of SBA-15 material with spherical particles is performed by the template method by using only a surfactant Pluronic P123 under acidic conditions. In the synthesis of SBA-15 with spherical particles, an HCl solution was used after specialised chemical treatment of clay purification. The dominant presence of the spheres with diameters up to around 2 μm was confirmed by the scanning electron microscopy(SEM) method. In contrast, the Energy-dispersive X-ray spectroscopy(EDS) confirmed that the spheres consisted only of SiO2 in composition. In addition to the methods mentioned above, X-ray diffraction (XRD), and Fourier-transform infrared spectroscopy(FTIR) methods were used to characterise SBA-15 materials.  Application of HCl solution after chemical treatment of clay purification represents the application of technology in the synthesis of spherical SBA-15.",
publisher = "Serbian Ceramic Society",
journal = "Serbian Ceramic Society Conference - ADVANCED CERAMICS AND APPLICATION IX Program and the Book of Abstracts",
title = "Synthesis of spherical SBA-15 silica particles without the use of additional cosurfactant",
pages = "66-66",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_1939"
}

Kokunesoski, M., Baščarević, Z., Ilic, S., Valenta Šobot, A., Grce, A., Pošarac-Marković, M.,& Saponjic, A.. (2021). Synthesis of spherical SBA-15 silica particles without the use of additional cosurfactant. in Serbian Ceramic Society Conference - ADVANCED CERAMICS AND APPLICATION IX Program and the Book of Abstracts
Serbian Ceramic Society., 66-66.
https://hdl.handle.net/21.15107/rcub_rimsi_1939

Kokunesoski M, Baščarević Z, Ilic S, Valenta Šobot A, Grce A, Pošarac-Marković M, Saponjic A. Synthesis of spherical SBA-15 silica particles without the use of additional cosurfactant. in Serbian Ceramic Society Conference - ADVANCED CERAMICS AND APPLICATION IX Program and the Book of Abstracts. 2021;:66-66.
https://hdl.handle.net/21.15107/rcub_rimsi_1939 .

Kokunesoski, Maja, Baščarević, Zvezdana, Ilic, Svetlana, Valenta Šobot, Ana, Grce, Ana, Pošarac-Marković, Milica, Saponjic, Aleksandra, "Synthesis of spherical SBA-15 silica particles without the use of additional cosurfactant" in Serbian Ceramic Society Conference - ADVANCED CERAMICS AND APPLICATION IX Program and the Book of Abstracts (2021):66-66,
https://hdl.handle.net/21.15107/rcub_rimsi_1939 .

TY  - CONF
AU  - Kokunesoski, Maja
AU  - Baščarević, Zvezdana
AU  - Ilic, Svetlana
AU  - Valenta Šobot, Ana
AU  - Grce, Ana
AU  - Pošarac-Marković, Milica
AU  - Saponjic, Djordje
PY  - 2021
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1940
AB  - The template method synthesis of both SBA-15 materials with elongated and spherical particles was performed using a surfactant Pluronic P123. The HCl (p.a.) was used to synthesize material with elongated particles connected in chain structures grouped into shapes resembling sheaves of wheat. In the synthesis of spherical SBA-15 with diameters ranging from 0.5 to 2 μm, a spent HCl solution which was obtained after chemical treatment of clay was used where the dominant presence of the spheres was confirmed by the SEM method. In addition to the methods mentioned above, XRD, EDS and FTIR methods characterize SBA-15 materials.
PB  - Society of Physical Chemists of Serbia
C3  - Physical Chemistry 2021 (Proceedings) ISBN 978-86-82475-40-8
T1  - The influence of hydrochloric acid on the features of SBA-15 particles
EP  - 441
SP  - 438
VL  - II
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_1940
ER  - 

@conference{
author = "Kokunesoski, Maja and Baščarević, Zvezdana and Ilic, Svetlana and Valenta Šobot, Ana and Grce, Ana and Pošarac-Marković, Milica and Saponjic, Djordje",
year = "2021",
abstract = "The template method synthesis of both SBA-15 materials with elongated and spherical particles was performed using a surfactant Pluronic P123. The HCl (p.a.) was used to synthesize material with elongated particles connected in chain structures grouped into shapes resembling sheaves of wheat. In the synthesis of spherical SBA-15 with diameters ranging from 0.5 to 2 μm, a spent HCl solution which was obtained after chemical treatment of clay was used where the dominant presence of the spheres was confirmed by the SEM method. In addition to the methods mentioned above, XRD, EDS and FTIR methods characterize SBA-15 materials.",
publisher = "Society of Physical Chemists of Serbia",
journal = "Physical Chemistry 2021 (Proceedings) ISBN 978-86-82475-40-8",
title = "The influence of hydrochloric acid on the features of SBA-15 particles",
pages = "441-438",
volume = "II",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_1940"
}

Kokunesoski, M., Baščarević, Z., Ilic, S., Valenta Šobot, A., Grce, A., Pošarac-Marković, M.,& Saponjic, D.. (2021). The influence of hydrochloric acid on the features of SBA-15 particles. in Physical Chemistry 2021 (Proceedings) ISBN 978-86-82475-40-8
Society of Physical Chemists of Serbia., II, 438-441.
https://hdl.handle.net/21.15107/rcub_rimsi_1940

Kokunesoski M, Baščarević Z, Ilic S, Valenta Šobot A, Grce A, Pošarac-Marković M, Saponjic D. The influence of hydrochloric acid on the features of SBA-15 particles. in Physical Chemistry 2021 (Proceedings) ISBN 978-86-82475-40-8. 2021;II:438-441.
https://hdl.handle.net/21.15107/rcub_rimsi_1940 .

Kokunesoski, Maja, Baščarević, Zvezdana, Ilic, Svetlana, Valenta Šobot, Ana, Grce, Ana, Pošarac-Marković, Milica, Saponjic, Djordje, "The influence of hydrochloric acid on the features of SBA-15 particles" in Physical Chemistry 2021 (Proceedings) ISBN 978-86-82475-40-8, II (2021):438-441,
https://hdl.handle.net/21.15107/rcub_rimsi_1940 .

TY  - JOUR
AU  - Rakić, Jelena
AU  - Baščarević, Zvezdana
PY  - 2020
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1741
AB  - Veziva sa velikim udelom elektrofilterskog pepela (EFP) se odlikuju dugim vremenima vezivanja i malim početnim čvrstoćama. Primenom metoda mehaničke i/ili hemijske aktivacije moguće je značajno povećati reaktivnost EFP, te poboljšati svojstva veziva. U ovom radu ispitivan je uticaj mehaničke aktivacije EFP na svojstva veziva sa 70% EFP i 30% portland cementa. Dodatno, analiziran je uticaj hemijske aktivacije veziva primenom natrijum-sulfata kao aktivatora. Primenom kombinacije postupaka mehaničke i hemijske aktivacije dobijeno je vezivo koje je imalo najveće čvrstoće u početnom periodu (do 7 dana) i najkraće vreme vezivanja. Ipak, najveću čvrstoću posle 90 dana imalo je vezivo na bazi mehanički aktiviranog EFP.
AB  - High volume fly ash (FA) binders are characterized by long setting times and low early strength. By
applying mechanical and/or chemical activation methods, it is possible to increase the reactivity of FA and improve the properties of the binder. In this paper, influence of mechanical activation of FA on the properties of binders prepared with 70% FA and 30% Portland cement was investigated. Additionally, effect of chemical activation of the binder by using sodium sulfate as activator was evaluated. The binder obtained by combining mechanical and chemical activation had the highest early strength (up to 7 days) and the shortest setting times. However, the highest strength of the binder after 90 days was obtained by applying only mechanical activation of FA.
PB  - Savez inženjera i tehničara Srbije
T2  - Tehnika
T1  - Poboljšanje svojstava veziva sa velikim udelom elektrofilterskog pepela primenom postupaka mehaničke i hemijske aktivacije
T1  - Improving properties of high volume fly ash binder by mechanical and chemical activation
EP  - 559
SP  - 553
VL  - 5
DO  - 10.5937/tehnika2005553R
ER  - 

@article{
author = "Rakić, Jelena and Baščarević, Zvezdana",
year = "2020",
abstract = "Veziva sa velikim udelom elektrofilterskog pepela (EFP) se odlikuju dugim vremenima vezivanja i malim početnim čvrstoćama. Primenom metoda mehaničke i/ili hemijske aktivacije moguće je značajno povećati reaktivnost EFP, te poboljšati svojstva veziva. U ovom radu ispitivan je uticaj mehaničke aktivacije EFP na svojstva veziva sa 70% EFP i 30% portland cementa. Dodatno, analiziran je uticaj hemijske aktivacije veziva primenom natrijum-sulfata kao aktivatora. Primenom kombinacije postupaka mehaničke i hemijske aktivacije dobijeno je vezivo koje je imalo najveće čvrstoće u početnom periodu (do 7 dana) i najkraće vreme vezivanja. Ipak, najveću čvrstoću posle 90 dana imalo je vezivo na bazi mehanički aktiviranog EFP., High volume fly ash (FA) binders are characterized by long setting times and low early strength. By
applying mechanical and/or chemical activation methods, it is possible to increase the reactivity of FA and improve the properties of the binder. In this paper, influence of mechanical activation of FA on the properties of binders prepared with 70% FA and 30% Portland cement was investigated. Additionally, effect of chemical activation of the binder by using sodium sulfate as activator was evaluated. The binder obtained by combining mechanical and chemical activation had the highest early strength (up to 7 days) and the shortest setting times. However, the highest strength of the binder after 90 days was obtained by applying only mechanical activation of FA.",
publisher = "Savez inženjera i tehničara Srbije",
journal = "Tehnika",
title = "Poboljšanje svojstava veziva sa velikim udelom elektrofilterskog pepela primenom postupaka mehaničke i hemijske aktivacije, Improving properties of high volume fly ash binder by mechanical and chemical activation",
pages = "559-553",
volume = "5",
doi = "10.5937/tehnika2005553R"
}

Rakić, J.,& Baščarević, Z.. (2020). Poboljšanje svojstava veziva sa velikim udelom elektrofilterskog pepela primenom postupaka mehaničke i hemijske aktivacije. in Tehnika
Savez inženjera i tehničara Srbije., 5, 553-559.
https://doi.org/10.5937/tehnika2005553R

Rakić J, Baščarević Z. Poboljšanje svojstava veziva sa velikim udelom elektrofilterskog pepela primenom postupaka mehaničke i hemijske aktivacije. in Tehnika. 2020;5:553-559.
doi:10.5937/tehnika2005553R .

Rakić, Jelena, Baščarević, Zvezdana, "Poboljšanje svojstava veziva sa velikim udelom elektrofilterskog pepela primenom postupaka mehaničke i hemijske aktivacije" in Tehnika, 5 (2020):553-559,
https://doi.org/10.5937/tehnika2005553R . .

TY  - JOUR
AU  - Omerasević, Mia
AU  - Lukic, Miodrag
AU  - Savic-Bisercic, Marjetka
AU  - Savić, Andrija
AU  - Matović, Ljiljana
AU  - Baščarević, Zvezdana
AU  - Bucevac, Dusan
PY  - 2020
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1388
AB  - A promising method for removal of Cs ions from water and their incorporation into stable crystal structure ready for safe and permanent disposal was described. Cs-exchanged X zeolite was hot-pressed at temperature ranging from 800 to 950 degrees C to fabricate dense pollucite ceramics. It was found that the application of external pressure reduced the pollucite formation temperature. The effect of sintering temperature on density, phase composition and mechanical properties was investigated. The highest density of 92.5 %TD and the highest compressive strength of 79 MPa were measured in pollucite hotpressed at 950 degrees C for 3 h. Heterogeneity of samples obtained at 950 degrees C was determined using scanning electron microscopy. The pollucite hot-pressed at 950 degrees C had low linear thermal expansion coefficient of similar to 4.67 x 10(-6) K-1 in the temperature range from 100 to 1000 degrees C.
PB  - Korean Nuclear Soc, Daejeon
T2  - Nuclear Engineering and Technology
T1  - Permanent disposal of Cs ions in the form of dense pollucite ceramics having low thermal expansion coefficient
EP  - 122
IS  - 1
SP  - 115
VL  - 52
DO  - 10.1016/j.net.2019.07.001
ER  - 

@article{
author = "Omerasević, Mia and Lukic, Miodrag and Savic-Bisercic, Marjetka and Savić, Andrija and Matović, Ljiljana and Baščarević, Zvezdana and Bucevac, Dusan",
year = "2020",
abstract = "A promising method for removal of Cs ions from water and their incorporation into stable crystal structure ready for safe and permanent disposal was described. Cs-exchanged X zeolite was hot-pressed at temperature ranging from 800 to 950 degrees C to fabricate dense pollucite ceramics. It was found that the application of external pressure reduced the pollucite formation temperature. The effect of sintering temperature on density, phase composition and mechanical properties was investigated. The highest density of 92.5 %TD and the highest compressive strength of 79 MPa were measured in pollucite hotpressed at 950 degrees C for 3 h. Heterogeneity of samples obtained at 950 degrees C was determined using scanning electron microscopy. The pollucite hot-pressed at 950 degrees C had low linear thermal expansion coefficient of similar to 4.67 x 10(-6) K-1 in the temperature range from 100 to 1000 degrees C.",
publisher = "Korean Nuclear Soc, Daejeon",
journal = "Nuclear Engineering and Technology",
title = "Permanent disposal of Cs ions in the form of dense pollucite ceramics having low thermal expansion coefficient",
pages = "122-115",
number = "1",
volume = "52",
doi = "10.1016/j.net.2019.07.001"
}

Omerasević, M., Lukic, M., Savic-Bisercic, M., Savić, A., Matović, L., Baščarević, Z.,& Bucevac, D.. (2020). Permanent disposal of Cs ions in the form of dense pollucite ceramics having low thermal expansion coefficient. in Nuclear Engineering and Technology
Korean Nuclear Soc, Daejeon., 52(1), 115-122.
https://doi.org/10.1016/j.net.2019.07.001

Omerasević M, Lukic M, Savic-Bisercic M, Savić A, Matović L, Baščarević Z, Bucevac D. Permanent disposal of Cs ions in the form of dense pollucite ceramics having low thermal expansion coefficient. in Nuclear Engineering and Technology. 2020;52(1):115-122.
doi:10.1016/j.net.2019.07.001 .

Omerasević, Mia, Lukic, Miodrag, Savic-Bisercic, Marjetka, Savić, Andrija, Matović, Ljiljana, Baščarević, Zvezdana, Bucevac, Dusan, "Permanent disposal of Cs ions in the form of dense pollucite ceramics having low thermal expansion coefficient" in Nuclear Engineering and Technology, 52, no. 1 (2020):115-122,
https://doi.org/10.1016/j.net.2019.07.001 . .

TY  - CONF
AU  - Rakić, Jelena
AU  - Baščarević, Zvezdana
PY  - 2019
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1733
AB  - More than 5.5 million tonnes of fly ash (FA), a by-product originating from coal combustion in thermal power plants (TPP), is produced in Serbia annually. Only small part of the FA is reused, mostly by cement industry, while the rest of it is disposed on landfills. Given its chemical composition and particle size distribution, FA has huge potential for reuse, especially in construction industry. Some of the most promising ways for FA utilization in building materials industry are synthesis of alkali-activated materials (AAM) and binders in which different quantities of Portland cement (PC) are substituted with FA (up to 80%). However, potential use of FA strongly depends on its reactivity. Among factors that affect FA reactivity, particle size distribution and amorphous phase content are the most important. A way to improve the reactivity of FA is mechanical activation, a process where mechanical energy is used to increase chemical reactivity of material. The main results of the mechanical activation process are particle size reduction, increase in specific surface area, generation of structural defects, increase in amorphous phase content, which all lead to better reactivity of material.
In this paper, FA from TPP “Kolubara”, Serbia, was mechanically activated in planetary ball mill using different ball-to-ash ratios, from 1:3 to 1:20. Characterization of raw and activated FA, such as particle size distribution, mineral and chemical composition, morphology and specific surface area, was carried out. The effects of mechanical activation of FA on the properties of resulting binders, both AAM and binder with PC, were also investigated.
It was found that mechanical activation, even with the lowest ball-to-ash ratio (1:3), caused drastic changes in particle size distribution and specific surface area of FA. Significant increase in compressive strength of mortars based on mechanically activated FA, relative to mortars based on raw FA, indicated that reactivity of FA was considerably improved by mechanical activation. Further increase in the ball-to ash ratio led to less significant changes in the properties of the activated FA and therefore, less considerable increase in compressive strength of the synthesized mortars. It was concluded that, in terms of the balance between time and energy consumption, on the one hand, and improvement of the FA properties on the other, further increase of ball-to-ash ratios was not justified.
PB  - Institute for multidisciplinary research
C3  - 5th Conference of The Serbian Society for Ceramic Materials, 5CSCS-2019, June 11-13, 2019, Belgrade, Serbia
T1  - Optimization of mechanical activation of fly ash
SP  - 138
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_1733
ER  - 

@conference{
author = "Rakić, Jelena and Baščarević, Zvezdana",
year = "2019",
abstract = "More than 5.5 million tonnes of fly ash (FA), a by-product originating from coal combustion in thermal power plants (TPP), is produced in Serbia annually. Only small part of the FA is reused, mostly by cement industry, while the rest of it is disposed on landfills. Given its chemical composition and particle size distribution, FA has huge potential for reuse, especially in construction industry. Some of the most promising ways for FA utilization in building materials industry are synthesis of alkali-activated materials (AAM) and binders in which different quantities of Portland cement (PC) are substituted with FA (up to 80%). However, potential use of FA strongly depends on its reactivity. Among factors that affect FA reactivity, particle size distribution and amorphous phase content are the most important. A way to improve the reactivity of FA is mechanical activation, a process where mechanical energy is used to increase chemical reactivity of material. The main results of the mechanical activation process are particle size reduction, increase in specific surface area, generation of structural defects, increase in amorphous phase content, which all lead to better reactivity of material.
In this paper, FA from TPP “Kolubara”, Serbia, was mechanically activated in planetary ball mill using different ball-to-ash ratios, from 1:3 to 1:20. Characterization of raw and activated FA, such as particle size distribution, mineral and chemical composition, morphology and specific surface area, was carried out. The effects of mechanical activation of FA on the properties of resulting binders, both AAM and binder with PC, were also investigated.
It was found that mechanical activation, even with the lowest ball-to-ash ratio (1:3), caused drastic changes in particle size distribution and specific surface area of FA. Significant increase in compressive strength of mortars based on mechanically activated FA, relative to mortars based on raw FA, indicated that reactivity of FA was considerably improved by mechanical activation. Further increase in the ball-to ash ratio led to less significant changes in the properties of the activated FA and therefore, less considerable increase in compressive strength of the synthesized mortars. It was concluded that, in terms of the balance between time and energy consumption, on the one hand, and improvement of the FA properties on the other, further increase of ball-to-ash ratios was not justified.",
publisher = "Institute for multidisciplinary research",
journal = "5th Conference of The Serbian Society for Ceramic Materials, 5CSCS-2019, June 11-13, 2019, Belgrade, Serbia",
title = "Optimization of mechanical activation of fly ash",
pages = "138",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_1733"
}

Rakić, J.,& Baščarević, Z.. (2019). Optimization of mechanical activation of fly ash. in 5th Conference of The Serbian Society for Ceramic Materials, 5CSCS-2019, June 11-13, 2019, Belgrade, Serbia
Institute for multidisciplinary research., 138.
https://hdl.handle.net/21.15107/rcub_rimsi_1733

Rakić J, Baščarević Z. Optimization of mechanical activation of fly ash. in 5th Conference of The Serbian Society for Ceramic Materials, 5CSCS-2019, June 11-13, 2019, Belgrade, Serbia. 2019;:138.
https://hdl.handle.net/21.15107/rcub_rimsi_1733 .

Rakić, Jelena, Baščarević, Zvezdana, "Optimization of mechanical activation of fly ash" in 5th Conference of The Serbian Society for Ceramic Materials, 5CSCS-2019, June 11-13, 2019, Belgrade, Serbia (2019):138,
https://hdl.handle.net/21.15107/rcub_rimsi_1733 .

TY  - JOUR
AU  - Cvetković, Vesna S.
AU  - Vukicević, Nataša M.
AU  - Nikolic, Nebojša D.
AU  - Baščarević, Zvezdana
AU  - Barudzija, Tanja S.
AU  - Jovicević, Jovan N.
PY  - 2019
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1251
AB  - The processes of electrodeposition from magnesium nitrate hexahydrate melt by galvanostatic regime of electrolysis have been analyzed. The structure of the formed particles was examined by X-ray diffraction (XRD), which revealed formation of MgO/Mg(OH)(2) mixture by molten salt electrolysis. Morphologies of the produced deposits were characterized by scanning electron microscopy (SEM) technique. The flower-like forms constructed from very thin needles with sharp tips were predominately formed by electrodeposition at various current densities and with various amounts of electricity. Aside from that, holes formed from detached hydrogen bubbles of various shapes and sizes, from dish-like holes to those resulting in honeycomb-like structures were also observed. Mechanism of formation of the flower-like forms has been elucidated applying the general theory of disperse deposits formation which is based on the concept of local (spherical and cylindrical) diffusion fields. It is shown that the growth of the needles occurs under the conditions of predominant spherical diffusion control, while the contribution of the cylindrical diffusion to the final shapes was negligible. Comparison with morphologies of deposits obtained by electrodepositions from aqueous magnesium salt electrolytes was also made and discussed.
PB  - Elsevier Science Sa, Lausanne
T2  - Journal of Electroanalytical Chemistry
T1  - A possible mechanism of formation of flower-like MgO/Mg(OH)(2) structures by galvanostatic molten salt electrolysis: The concept of local diffusion fields
EP  - 175
SP  - 168
VL  - 842
DO  - 10.1016/j.jelechem.2019.04.067
ER  - 

@article{
author = "Cvetković, Vesna S. and Vukicević, Nataša M. and Nikolic, Nebojša D. and Baščarević, Zvezdana and Barudzija, Tanja S. and Jovicević, Jovan N.",
year = "2019",
abstract = "The processes of electrodeposition from magnesium nitrate hexahydrate melt by galvanostatic regime of electrolysis have been analyzed. The structure of the formed particles was examined by X-ray diffraction (XRD), which revealed formation of MgO/Mg(OH)(2) mixture by molten salt electrolysis. Morphologies of the produced deposits were characterized by scanning electron microscopy (SEM) technique. The flower-like forms constructed from very thin needles with sharp tips were predominately formed by electrodeposition at various current densities and with various amounts of electricity. Aside from that, holes formed from detached hydrogen bubbles of various shapes and sizes, from dish-like holes to those resulting in honeycomb-like structures were also observed. Mechanism of formation of the flower-like forms has been elucidated applying the general theory of disperse deposits formation which is based on the concept of local (spherical and cylindrical) diffusion fields. It is shown that the growth of the needles occurs under the conditions of predominant spherical diffusion control, while the contribution of the cylindrical diffusion to the final shapes was negligible. Comparison with morphologies of deposits obtained by electrodepositions from aqueous magnesium salt electrolytes was also made and discussed.",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Journal of Electroanalytical Chemistry",
title = "A possible mechanism of formation of flower-like MgO/Mg(OH)(2) structures by galvanostatic molten salt electrolysis: The concept of local diffusion fields",
pages = "175-168",
volume = "842",
doi = "10.1016/j.jelechem.2019.04.067"
}

Cvetković, V. S., Vukicević, N. M., Nikolic, N. D., Baščarević, Z., Barudzija, T. S.,& Jovicević, J. N.. (2019). A possible mechanism of formation of flower-like MgO/Mg(OH)(2) structures by galvanostatic molten salt electrolysis: The concept of local diffusion fields. in Journal of Electroanalytical Chemistry
Elsevier Science Sa, Lausanne., 842, 168-175.
https://doi.org/10.1016/j.jelechem.2019.04.067

Cvetković VS, Vukicević NM, Nikolic ND, Baščarević Z, Barudzija TS, Jovicević JN. A possible mechanism of formation of flower-like MgO/Mg(OH)(2) structures by galvanostatic molten salt electrolysis: The concept of local diffusion fields. in Journal of Electroanalytical Chemistry. 2019;842:168-175.
doi:10.1016/j.jelechem.2019.04.067 .

Cvetković, Vesna S., Vukicević, Nataša M., Nikolic, Nebojša D., Baščarević, Zvezdana, Barudzija, Tanja S., Jovicević, Jovan N., "A possible mechanism of formation of flower-like MgO/Mg(OH)(2) structures by galvanostatic molten salt electrolysis: The concept of local diffusion fields" in Journal of Electroanalytical Chemistry, 842 (2019):168-175,
https://doi.org/10.1016/j.jelechem.2019.04.067 . .

TY  - JOUR
AU  - Nikolic, Nebojša D.
AU  - Živković, Predrag M.
AU  - Pavlović, Miomir G.
AU  - Baščarević, Zvezdana
PY  - 2019
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1237
AB  - The morphologies of copper dendritic forms obtained in both potentiostatic and galvanostatic regimes of electrolysis with various amounts of the electricity were analyzed by the scanning electron microscopy (SEM) technique. Irrespective of amount of passed electricity, 3D (three dimensional) pine-like dendrites with sharp tips were formed in the potentiostatic regime of electrolysis. On the other hand, the amount of passed electricity had a strong effect on the shape of the 3D pine-like dendrites formed in the galvanostatic regime of electrolysis. Dendrites with sharp tips were formed with smaller amount of passed electricity, while dendrites with globular tips were formed with larger amounts. The change in the shape of the galvanostatically synthesized 3D pine-like dendrites was explained by comparison with copper deposits obtained potentiostatically at overpotentials that corresponded to the final overpotentials during galvanostatic regime of electrolysis for the analyzed amounts of electricity. Based on the similarity of the obtained morphologies at the macro level, it was concluded that the overpotential plays a crucial role in the formation of the electrolytically synthesized dendrites and that the controlled conditions of electrolysis could represent a suitable way for a synthesis of spherical Cu particles by electrolysis.
PB  - Srpsko hemijsko društvo, Beograd
T2  - Journal of the Serbian Chemical Society
T1  - Overpotential controls the morphology of electrolytically produced copper dendritic forms
EP  - 1220
IS  - 11
SP  - 1209
VL  - 84
DO  - 10.2298/JSC190522066N
ER  - 

@article{
author = "Nikolic, Nebojša D. and Živković, Predrag M. and Pavlović, Miomir G. and Baščarević, Zvezdana",
year = "2019",
abstract = "The morphologies of copper dendritic forms obtained in both potentiostatic and galvanostatic regimes of electrolysis with various amounts of the electricity were analyzed by the scanning electron microscopy (SEM) technique. Irrespective of amount of passed electricity, 3D (three dimensional) pine-like dendrites with sharp tips were formed in the potentiostatic regime of electrolysis. On the other hand, the amount of passed electricity had a strong effect on the shape of the 3D pine-like dendrites formed in the galvanostatic regime of electrolysis. Dendrites with sharp tips were formed with smaller amount of passed electricity, while dendrites with globular tips were formed with larger amounts. The change in the shape of the galvanostatically synthesized 3D pine-like dendrites was explained by comparison with copper deposits obtained potentiostatically at overpotentials that corresponded to the final overpotentials during galvanostatic regime of electrolysis for the analyzed amounts of electricity. Based on the similarity of the obtained morphologies at the macro level, it was concluded that the overpotential plays a crucial role in the formation of the electrolytically synthesized dendrites and that the controlled conditions of electrolysis could represent a suitable way for a synthesis of spherical Cu particles by electrolysis.",
publisher = "Srpsko hemijsko društvo, Beograd",
journal = "Journal of the Serbian Chemical Society",
title = "Overpotential controls the morphology of electrolytically produced copper dendritic forms",
pages = "1220-1209",
number = "11",
volume = "84",
doi = "10.2298/JSC190522066N"
}

Nikolic, N. D., Živković, P. M., Pavlović, M. G.,& Baščarević, Z.. (2019). Overpotential controls the morphology of electrolytically produced copper dendritic forms. in Journal of the Serbian Chemical Society
Srpsko hemijsko društvo, Beograd., 84(11), 1209-1220.
https://doi.org/10.2298/JSC190522066N

Nikolic ND, Živković PM, Pavlović MG, Baščarević Z. Overpotential controls the morphology of electrolytically produced copper dendritic forms. in Journal of the Serbian Chemical Society. 2019;84(11):1209-1220.
doi:10.2298/JSC190522066N .

Nikolic, Nebojša D., Živković, Predrag M., Pavlović, Miomir G., Baščarević, Zvezdana, "Overpotential controls the morphology of electrolytically produced copper dendritic forms" in Journal of the Serbian Chemical Society, 84, no. 11 (2019):1209-1220,
https://doi.org/10.2298/JSC190522066N . .

TY  - JOUR
AU  - Avramović, Ljiljana
AU  - Maksimović, Vesna M
AU  - Baščarević, Zvezdana
AU  - Ignjatović, Nenad
AU  - Bugarin, Mile
AU  - Marković, Radmila
AU  - Nikolic, Nebojša D.
PY  - 2019
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1235
AB  - Three different forms of Cu powder particles obtained by either galvanostatic electrolysis or a non-electrolytic method were analyzed by a scanning electron microscope (SEM), X-ray diffraction (XRD) and particle size distribution (PSD). Electrolytic procedures were performed under different hydrogen evolution conditions, leading to the formation of either 3D branched dendrites or disperse cauliflower-like particles. The third type of particles were compact agglomerates of the Cu grains, whose structural characteristics indicated that they were formed by a non-electrolytic method. Unlike the sharp tips that characterize the usual form of Cu dendrites, the ends of both the trunk and branches were globules in the formed dendrites, indicating that a novel type of Cu dendrites was formed in this investigation. Although the macro structures of the particles were extremely varied, they had very similar micro structures because they were constructed by spherical grains. The Cu crystallites were randomly oriented in the dendrites and compact agglomerates of the Cu grains, while the disperse cauliflower-like particles showed (220) and (311) preferred orientation. This indicates that the applied current density affects not only the morphology of the particles, but also their crystal structure. The best performance, defined by the largest specific surface area and the smallest particle size, was by the galvanostatically produced powder consisting of disperse cauliflower-like particles.
PB  - MDPI, Basel
T2  - Metals
T1  - Influence of the Shape of Copper Powder Particles on the Crystal Structure and Some Decisive Characteristics of the Metal Powders
IS  - 1
VL  - 9
DO  - 10.3390/met9010056
ER  - 

@article{
author = "Avramović, Ljiljana and Maksimović, Vesna M and Baščarević, Zvezdana and Ignjatović, Nenad and Bugarin, Mile and Marković, Radmila and Nikolic, Nebojša D.",
year = "2019",
abstract = "Three different forms of Cu powder particles obtained by either galvanostatic electrolysis or a non-electrolytic method were analyzed by a scanning electron microscope (SEM), X-ray diffraction (XRD) and particle size distribution (PSD). Electrolytic procedures were performed under different hydrogen evolution conditions, leading to the formation of either 3D branched dendrites or disperse cauliflower-like particles. The third type of particles were compact agglomerates of the Cu grains, whose structural characteristics indicated that they were formed by a non-electrolytic method. Unlike the sharp tips that characterize the usual form of Cu dendrites, the ends of both the trunk and branches were globules in the formed dendrites, indicating that a novel type of Cu dendrites was formed in this investigation. Although the macro structures of the particles were extremely varied, they had very similar micro structures because they were constructed by spherical grains. The Cu crystallites were randomly oriented in the dendrites and compact agglomerates of the Cu grains, while the disperse cauliflower-like particles showed (220) and (311) preferred orientation. This indicates that the applied current density affects not only the morphology of the particles, but also their crystal structure. The best performance, defined by the largest specific surface area and the smallest particle size, was by the galvanostatically produced powder consisting of disperse cauliflower-like particles.",
publisher = "MDPI, Basel",
journal = "Metals",
title = "Influence of the Shape of Copper Powder Particles on the Crystal Structure and Some Decisive Characteristics of the Metal Powders",
number = "1",
volume = "9",
doi = "10.3390/met9010056"
}

Avramović, L., Maksimović, V. M., Baščarević, Z., Ignjatović, N., Bugarin, M., Marković, R.,& Nikolic, N. D.. (2019). Influence of the Shape of Copper Powder Particles on the Crystal Structure and Some Decisive Characteristics of the Metal Powders. in Metals
MDPI, Basel., 9(1).
https://doi.org/10.3390/met9010056

Avramović L, Maksimović VM, Baščarević Z, Ignjatović N, Bugarin M, Marković R, Nikolic ND. Influence of the Shape of Copper Powder Particles on the Crystal Structure and Some Decisive Characteristics of the Metal Powders. in Metals. 2019;9(1).
doi:10.3390/met9010056 .

Avramović, Ljiljana, Maksimović, Vesna M, Baščarević, Zvezdana, Ignjatović, Nenad, Bugarin, Mile, Marković, Radmila, Nikolic, Nebojša D., "Influence of the Shape of Copper Powder Particles on the Crystal Structure and Some Decisive Characteristics of the Metal Powders" in Metals, 9, no. 1 (2019),
https://doi.org/10.3390/met9010056 . .