TY  - JOUR
AU  - Kokunešoski, Maja
AU  - Janaćković, Đorđe
AU  - Kićević, Dušan
AU  - Ilić, Svetlana
AU  - Šaponjić, Aleksandra
PY  - 2023
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/6468
AB  - Effect of methyl methacrylate (MMA) as a binder and heating treatment were investigated to improve green alumina compacts machinability. Properties of green compacts and their corresponding sintered samples prepared with and without MMA were compared. Investigation of green and sintered properties was performed on samples compacted at applied pressures up to 150 MPa. After pressing, samples with MMA were thermally treated at 115oC. The intention was to enhance the polymerization of MMA at a temperature a little higher than the glass transition temperature (Tg = 103°C) of poly (methyl methacrylate). Green compacts with MMA had higher green density values than those without MMA. Sintered samples with MMA had lower values of sintered density and higher values of total porosity; after sintering, relative linear shrinkage was around 15 % for the whole range of applied pressures. The possibility of easily machining the green compacts with MMA produces great possibilities for application in many fields.
AB  - Испитиван je утицај метил метакрилата (ММА) као везива као и утицај термичког третманана машинску обрадивост испресака од алумине. Упоређена су својства како код испресака од алумине припремљених са и без ММА тако и код њима одговарајућих синтерованих узорака. Испитивање особина испресака и синтерованих узоракаизведено је на узорцима који су испресовани на притисцима до 150 МРа. Након пресовања, узорци са ММА су термички третирани на 115о С са намером да ММА полимеризује на нешто вишој температури од температуре стакластог прелаза (Тg = 103°C) поли(метил метакрилата. Испресци са ММА имали су веће густине од испресака без ММА. Синтеровани узорци припремљени са ММА имали су ниже синтероване густине и већу укупну порозност, aнакон синтеровања, релативно линеарно скупљање је било око 15 % за цео опсег примењених притисака пресовања. Пробе машинске обрадљивости показале су да машинска обрада испресака са ММА има велике могућности за комерцијалну примену.
PB  - International Institute for the Science of Sintering (IISS)
T2  - Science of Sintering
T1  - The Effect of Acrylate on the Properties and Machinability of Alumina Ceramics
EP  - 113
IS  - 1
SP  - 103
VL  - 55
DO  - 10.2298/SOS2301103K
ER  - 

@article{
author = "Kokunešoski, Maja and Janaćković, Đorđe and Kićević, Dušan and Ilić, Svetlana and Šaponjić, Aleksandra",
year = "2023",
abstract = "Effect of methyl methacrylate (MMA) as a binder and heating treatment were investigated to improve green alumina compacts machinability. Properties of green compacts and their corresponding sintered samples prepared with and without MMA were compared. Investigation of green and sintered properties was performed on samples compacted at applied pressures up to 150 MPa. After pressing, samples with MMA were thermally treated at 115oC. The intention was to enhance the polymerization of MMA at a temperature a little higher than the glass transition temperature (Tg = 103°C) of poly (methyl methacrylate). Green compacts with MMA had higher green density values than those without MMA. Sintered samples with MMA had lower values of sintered density and higher values of total porosity; after sintering, relative linear shrinkage was around 15 % for the whole range of applied pressures. The possibility of easily machining the green compacts with MMA produces great possibilities for application in many fields., Испитиван je утицај метил метакрилата (ММА) као везива као и утицај термичког третманана машинску обрадивост испресака од алумине. Упоређена су својства како код испресака од алумине припремљених са и без ММА тако и код њима одговарајућих синтерованих узорака. Испитивање особина испресака и синтерованих узоракаизведено је на узорцима који су испресовани на притисцима до 150 МРа. Након пресовања, узорци са ММА су термички третирани на 115о С са намером да ММА полимеризује на нешто вишој температури од температуре стакластог прелаза (Тg = 103°C) поли(метил метакрилата. Испресци са ММА имали су веће густине од испресака без ММА. Синтеровани узорци припремљени са ММА имали су ниже синтероване густине и већу укупну порозност, aнакон синтеровања, релативно линеарно скупљање је било око 15 % за цео опсег примењених притисака пресовања. Пробе машинске обрадљивости показале су да машинска обрада испресака са ММА има велике могућности за комерцијалну примену.",
publisher = "International Institute for the Science of Sintering (IISS)",
journal = "Science of Sintering",
title = "The Effect of Acrylate on the Properties and Machinability of Alumina Ceramics",
pages = "113-103",
number = "1",
volume = "55",
doi = "10.2298/SOS2301103K"
}

Kokunešoski, M., Janaćković, Đ., Kićević, D., Ilić, S.,& Šaponjić, A.. (2023). The Effect of Acrylate on the Properties and Machinability of Alumina Ceramics. in Science of Sintering
International Institute for the Science of Sintering (IISS)., 55(1), 103-113.
https://doi.org/10.2298/SOS2301103K

Kokunešoski M, Janaćković Đ, Kićević D, Ilić S, Šaponjić A. The Effect of Acrylate on the Properties and Machinability of Alumina Ceramics. in Science of Sintering. 2023;55(1):103-113.
doi:10.2298/SOS2301103K .

Kokunešoski, Maja, Janaćković, Đorđe, Kićević, Dušan, Ilić, Svetlana, Šaponjić, Aleksandra, "The Effect of Acrylate on the Properties and Machinability of Alumina Ceramics" in Science of Sintering, 55, no. 1 (2023):103-113,
https://doi.org/10.2298/SOS2301103K . .

TY  - JOUR
AU  - Ilić, Svetlana M.
AU  - Ivanovski, Valentin N.
AU  - Radovanović, Željko
AU  - Egelja, Adela
AU  - Kokunesoski, Maja
AU  - Saponjić, Aleksandra
AU  - Matović, Branko
PY  - 2020
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4502
AB  - The study of an effect of iron doping on the structural, microstructural and mechanical properties of sintered iron-doped mullite is presented. The results of phase composition, performed in detail by Mossbauer spectroscopy and XRD analysis, revealed that all added iron was inside the mullite lattice forming the single phase up to 12% by weight of Fe2O3 and 1300 degrees C. Samples, which were processed at 1550 degrees C, contained secondary phases, hematite or magnetite, regardless of the amount of added iron. Furthermore, the addition of iron decreases the values of relative linear shrinkage comparing to the values of undoped one (similar to 18%) while the densities of the sintered samples rise as well as their values of microhardness. Even though the density values were not too high (90 TD%), the obtained values of microhardness were excellent, 1634 HV0.1 for maximum iron content due to the characteristic mullite microstructure.
PB  - Elsevier, Amsterdam
T2  - Materials Science and Engineering B-Advanced Functional Solid-State Materials
T1  - Structural, microstructural and mechanical properties of sintered iron-doped mullite
VL  - 256
DO  - 10.1016/j.mseb.2020.114543
ER  - 

@article{
author = "Ilić, Svetlana M. and Ivanovski, Valentin N. and Radovanović, Željko and Egelja, Adela and Kokunesoski, Maja and Saponjić, Aleksandra and Matović, Branko",
year = "2020",
abstract = "The study of an effect of iron doping on the structural, microstructural and mechanical properties of sintered iron-doped mullite is presented. The results of phase composition, performed in detail by Mossbauer spectroscopy and XRD analysis, revealed that all added iron was inside the mullite lattice forming the single phase up to 12% by weight of Fe2O3 and 1300 degrees C. Samples, which were processed at 1550 degrees C, contained secondary phases, hematite or magnetite, regardless of the amount of added iron. Furthermore, the addition of iron decreases the values of relative linear shrinkage comparing to the values of undoped one (similar to 18%) while the densities of the sintered samples rise as well as their values of microhardness. Even though the density values were not too high (90 TD%), the obtained values of microhardness were excellent, 1634 HV0.1 for maximum iron content due to the characteristic mullite microstructure.",
publisher = "Elsevier, Amsterdam",
journal = "Materials Science and Engineering B-Advanced Functional Solid-State Materials",
title = "Structural, microstructural and mechanical properties of sintered iron-doped mullite",
volume = "256",
doi = "10.1016/j.mseb.2020.114543"
}

Ilić, S. M., Ivanovski, V. N., Radovanović, Ž., Egelja, A., Kokunesoski, M., Saponjić, A.,& Matović, B.. (2020). Structural, microstructural and mechanical properties of sintered iron-doped mullite. in Materials Science and Engineering B-Advanced Functional Solid-State Materials
Elsevier, Amsterdam., 256.
https://doi.org/10.1016/j.mseb.2020.114543

Ilić SM, Ivanovski VN, Radovanović Ž, Egelja A, Kokunesoski M, Saponjić A, Matović B. Structural, microstructural and mechanical properties of sintered iron-doped mullite. in Materials Science and Engineering B-Advanced Functional Solid-State Materials. 2020;256.
doi:10.1016/j.mseb.2020.114543 .

Ilić, Svetlana M., Ivanovski, Valentin N., Radovanović, Željko, Egelja, Adela, Kokunesoski, Maja, Saponjić, Aleksandra, Matović, Branko, "Structural, microstructural and mechanical properties of sintered iron-doped mullite" in Materials Science and Engineering B-Advanced Functional Solid-State Materials, 256 (2020),
https://doi.org/10.1016/j.mseb.2020.114543 . .

TY  - JOUR
AU  - Ilić, Svetlana M.
AU  - Babić, Biljana M.
AU  - Bjelajac, Anđelika
AU  - Stoimenov, Nikolay
AU  - Kljajević, Ljiljana M.
AU  - Pošarac-Marković, Milica B.
AU  - Matović, Branko
PY  - 2020
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4515
AB  - The structural and morphological properties of iron-doped mullite powders are the subject of the present study. The powders of undoped and iron-doped mullite in the composition range of 3-15 wt% Fe2O3 were synthesized by a combination of sol-gel and combustion methods. The excess of water and urea were introduced in reaction solutions to enhance the copolymerization of aluminum and silicon species. The results of structural characterization revealed that the synthesized mullite powders were amorphous of a hybrid type. The specific surface area of the undoped mullite powder was 262 m(2) g(-1) with a maximum pore radius (d(p)) of 2 nm classifying it into mesoporous materials. The addition of iron has reduced the specific surface area, while the pore size value remained the same except for the sample with 3 wt% Fe2O3 (S-BET = 278 m(2) g(-1); d(p) = 3 nm). The presence of iron caused lowering the temperature of liquid phase formation, while present urea combusted providing the increase of the temperature locally that caused the sintering and formation of agglomerates of smaller particles. However, the results of the particle size analysis are not straightforward. The values of mean volume diameter (D[3,4]) indicated that the particle size increased to 6 wt% Fe2O3 (123.6 mu m), and then decreased and for the sample with 12 wt% Fe2O3, it was equal to 96.6 mu m. Thus, the added iron contributed to the more uniform particle size distribution. The SEM analysis has also shown the coarse powder particles consisted of the coalesced smaller particles.
PB  - Elsevier Sci Ltd, Oxford
T2  - Ceramics International
T1  - Structural and morphological characterization of iron-doped sol-gel derived mullite powders
EP  - 13113
IS  - 9
SP  - 13107
VL  - 46
DO  - 10.1016/j.ceramint.2020.02.083
ER  - 

@article{
author = "Ilić, Svetlana M. and Babić, Biljana M. and Bjelajac, Anđelika and Stoimenov, Nikolay and Kljajević, Ljiljana M. and Pošarac-Marković, Milica B. and Matović, Branko",
year = "2020",
abstract = "The structural and morphological properties of iron-doped mullite powders are the subject of the present study. The powders of undoped and iron-doped mullite in the composition range of 3-15 wt% Fe2O3 were synthesized by a combination of sol-gel and combustion methods. The excess of water and urea were introduced in reaction solutions to enhance the copolymerization of aluminum and silicon species. The results of structural characterization revealed that the synthesized mullite powders were amorphous of a hybrid type. The specific surface area of the undoped mullite powder was 262 m(2) g(-1) with a maximum pore radius (d(p)) of 2 nm classifying it into mesoporous materials. The addition of iron has reduced the specific surface area, while the pore size value remained the same except for the sample with 3 wt% Fe2O3 (S-BET = 278 m(2) g(-1); d(p) = 3 nm). The presence of iron caused lowering the temperature of liquid phase formation, while present urea combusted providing the increase of the temperature locally that caused the sintering and formation of agglomerates of smaller particles. However, the results of the particle size analysis are not straightforward. The values of mean volume diameter (D[3,4]) indicated that the particle size increased to 6 wt% Fe2O3 (123.6 mu m), and then decreased and for the sample with 12 wt% Fe2O3, it was equal to 96.6 mu m. Thus, the added iron contributed to the more uniform particle size distribution. The SEM analysis has also shown the coarse powder particles consisted of the coalesced smaller particles.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Ceramics International",
title = "Structural and morphological characterization of iron-doped sol-gel derived mullite powders",
pages = "13113-13107",
number = "9",
volume = "46",
doi = "10.1016/j.ceramint.2020.02.083"
}

Ilić, S. M., Babić, B. M., Bjelajac, A., Stoimenov, N., Kljajević, L. M., Pošarac-Marković, M. B.,& Matović, B.. (2020). Structural and morphological characterization of iron-doped sol-gel derived mullite powders. in Ceramics International
Elsevier Sci Ltd, Oxford., 46(9), 13107-13113.
https://doi.org/10.1016/j.ceramint.2020.02.083

Ilić SM, Babić BM, Bjelajac A, Stoimenov N, Kljajević LM, Pošarac-Marković MB, Matović B. Structural and morphological characterization of iron-doped sol-gel derived mullite powders. in Ceramics International. 2020;46(9):13107-13113.
doi:10.1016/j.ceramint.2020.02.083 .

Ilić, Svetlana M., Babić, Biljana M., Bjelajac, Anđelika, Stoimenov, Nikolay, Kljajević, Ljiljana M., Pošarac-Marković, Milica B., Matović, Branko, "Structural and morphological characterization of iron-doped sol-gel derived mullite powders" in Ceramics International, 46, no. 9 (2020):13107-13113,
https://doi.org/10.1016/j.ceramint.2020.02.083 . .

TY  - JOUR
AU  - Nešić, Aleksandra
AU  - Kokunešoski, Maja
AU  - Ilić, Svetlana M.
AU  - Gordić, Milan V.
AU  - Ostojić, Sanja
AU  - Micić, Darko M.
AU  - Veličković, Sava J.
PY  - 2014
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5757
AB  - Manufacturing of synthetic composites consumes huge energy and their disposal at the end of the life cycle is very difficult since there is virtually no recycling option. Therefore, biocomposite materials have recently received considerable attention in academic research and industrial application compared to the synthetic composite materials due biodegradability, nontoxicity and economical point of view. Biocomposite membranes of highly methylated pectin and SBA-15, a form of mesoporous silica, were prepared by membrane casting. The amount of SBA-15 was 10%, 20% and 30% by membrane mass. These membranes were characterized by optical microscopy, FTIR, XRD, thermogravimetry, mechanical analysis and swelling in water, HCl, NaOH and methanol. The incorporation of SBA-15 in pectin matrix enhanced the stability of these membranes in all tested solutions, compared to the pure pectin membranes. The pectin/SBA photomicrographs contain rod-like domains which indicate the presence of SBA-15 in membrane. Mechanical analysis proves that incorporation of SBA-15 enhances the elasticity and tensile strength of pectin membranes. Thermogravimety in nitrogen has shown that the presence of SBA-15 in the membranes increased the onset temperatures of pectin degradation. The novel composite material represents promising way for practical membrane application. (C) 2014 Elsevier Ltd. All rights reserved.
PB  - Elsevier Ltd.
T2  - Composites: Part B: Engineering
T1  - Biocomposite membranes of highly methylated pectin and mesoporous silica SBA-15
EP  - 167
SP  - 162
VL  - 64
DO  - 10.1016/j.compositesb.2014.04.019
ER  - 

@article{
author = "Nešić, Aleksandra and Kokunešoski, Maja and Ilić, Svetlana M. and Gordić, Milan V. and Ostojić, Sanja and Micić, Darko M. and Veličković, Sava J.",
year = "2014",
abstract = "Manufacturing of synthetic composites consumes huge energy and their disposal at the end of the life cycle is very difficult since there is virtually no recycling option. Therefore, biocomposite materials have recently received considerable attention in academic research and industrial application compared to the synthetic composite materials due biodegradability, nontoxicity and economical point of view. Biocomposite membranes of highly methylated pectin and SBA-15, a form of mesoporous silica, were prepared by membrane casting. The amount of SBA-15 was 10%, 20% and 30% by membrane mass. These membranes were characterized by optical microscopy, FTIR, XRD, thermogravimetry, mechanical analysis and swelling in water, HCl, NaOH and methanol. The incorporation of SBA-15 in pectin matrix enhanced the stability of these membranes in all tested solutions, compared to the pure pectin membranes. The pectin/SBA photomicrographs contain rod-like domains which indicate the presence of SBA-15 in membrane. Mechanical analysis proves that incorporation of SBA-15 enhances the elasticity and tensile strength of pectin membranes. Thermogravimety in nitrogen has shown that the presence of SBA-15 in the membranes increased the onset temperatures of pectin degradation. The novel composite material represents promising way for practical membrane application. (C) 2014 Elsevier Ltd. All rights reserved.",
publisher = "Elsevier Ltd.",
journal = "Composites: Part B: Engineering",
title = "Biocomposite membranes of highly methylated pectin and mesoporous silica SBA-15",
pages = "167-162",
volume = "64",
doi = "10.1016/j.compositesb.2014.04.019"
}

Nešić, A., Kokunešoski, M., Ilić, S. M., Gordić, M. V., Ostojić, S., Micić, D. M.,& Veličković, S. J.. (2014). Biocomposite membranes of highly methylated pectin and mesoporous silica SBA-15. in Composites: Part B: Engineering
Elsevier Ltd.., 64, 162-167.
https://doi.org/10.1016/j.compositesb.2014.04.019

Nešić A, Kokunešoski M, Ilić SM, Gordić MV, Ostojić S, Micić DM, Veličković SJ. Biocomposite membranes of highly methylated pectin and mesoporous silica SBA-15. in Composites: Part B: Engineering. 2014;64:162-167.
doi:10.1016/j.compositesb.2014.04.019 .

Nešić, Aleksandra, Kokunešoski, Maja, Ilić, Svetlana M., Gordić, Milan V., Ostojić, Sanja, Micić, Darko M., Veličković, Sava J., "Biocomposite membranes of highly methylated pectin and mesoporous silica SBA-15" in Composites: Part B: Engineering, 64 (2014):162-167,
https://doi.org/10.1016/j.compositesb.2014.04.019 . .

TY  - JOUR
AU  - Ilić, Svetlana M.
AU  - Zec, Slavica
AU  - Miljković, Miroslav
AU  - Poleti, Dejan
AU  - Pošarac-Marković, Milica B.
AU  - Janaćković, Đorđe
AU  - Matović, Branko
PY  - 2014
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2687
AB  - Amorphous powders of iron doped 3:2 mullite (3Al(2)O(3)center dot 2SiO(2)) were prepared by sol-gel combustion process using ethanol-water solutions of Al(III) nitrate, Fe(III) nitrate, TEOS and urea. Compositions up to 15 wt% of Fe2O3 were investigated. After combustion and heat treatment at 800 degrees C for 4 h, XRD analysis confirmed that the powders were amorphous. This is in agreement with the thermodynamic predictions that direct formation of mullite has not occurred during the aluminum nitrate - urea combustion reaction. XRD patterns of uniaxially pressed and sintered pellets at 1550 degrees C for 4 h revealed the crystal structure of orthorhombic mullite. The lattice parameters and unit cell volume increases as the mullite solid solutions were enriched by iron. The TGA/DSC analysis showed the reducing of crystallization temperature of iron doped mullites with increasing of iron content in reaction mixtures. The mullitization reaction is two-step process including formation of transient spinel phase below 1000 degrees C and mullite crystallization at temperatures about 1200 degrees C. The SEM micrographs of the sintered samples reveal elongated mullite grains with grain length up to 40 mu m. Increasing of the iron content in the reaction mixture enhances the grain size and the grains become elongated and better packed increasing the density of sintered samples.
PB  - Elsevier Science Sa, Lausanne
T2  - Journal of Alloys and Compounds
T1  - Sol-gel synthesis and characterization of iron doped mullite
EP  - 264
SP  - 259
VL  - 612
DO  - 10.1016/j.jallcom.2014.05.204
ER  - 

@article{
author = "Ilić, Svetlana M. and Zec, Slavica and Miljković, Miroslav and Poleti, Dejan and Pošarac-Marković, Milica B. and Janaćković, Đorđe and Matović, Branko",
year = "2014",
abstract = "Amorphous powders of iron doped 3:2 mullite (3Al(2)O(3)center dot 2SiO(2)) were prepared by sol-gel combustion process using ethanol-water solutions of Al(III) nitrate, Fe(III) nitrate, TEOS and urea. Compositions up to 15 wt% of Fe2O3 were investigated. After combustion and heat treatment at 800 degrees C for 4 h, XRD analysis confirmed that the powders were amorphous. This is in agreement with the thermodynamic predictions that direct formation of mullite has not occurred during the aluminum nitrate - urea combustion reaction. XRD patterns of uniaxially pressed and sintered pellets at 1550 degrees C for 4 h revealed the crystal structure of orthorhombic mullite. The lattice parameters and unit cell volume increases as the mullite solid solutions were enriched by iron. The TGA/DSC analysis showed the reducing of crystallization temperature of iron doped mullites with increasing of iron content in reaction mixtures. The mullitization reaction is two-step process including formation of transient spinel phase below 1000 degrees C and mullite crystallization at temperatures about 1200 degrees C. The SEM micrographs of the sintered samples reveal elongated mullite grains with grain length up to 40 mu m. Increasing of the iron content in the reaction mixture enhances the grain size and the grains become elongated and better packed increasing the density of sintered samples.",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Journal of Alloys and Compounds",
title = "Sol-gel synthesis and characterization of iron doped mullite",
pages = "264-259",
volume = "612",
doi = "10.1016/j.jallcom.2014.05.204"
}

Ilić, S. M., Zec, S., Miljković, M., Poleti, D., Pošarac-Marković, M. B., Janaćković, Đ.,& Matović, B.. (2014). Sol-gel synthesis and characterization of iron doped mullite. in Journal of Alloys and Compounds
Elsevier Science Sa, Lausanne., 612, 259-264.
https://doi.org/10.1016/j.jallcom.2014.05.204

Ilić SM, Zec S, Miljković M, Poleti D, Pošarac-Marković MB, Janaćković Đ, Matović B. Sol-gel synthesis and characterization of iron doped mullite. in Journal of Alloys and Compounds. 2014;612:259-264.
doi:10.1016/j.jallcom.2014.05.204 .

Ilić, Svetlana M., Zec, Slavica, Miljković, Miroslav, Poleti, Dejan, Pošarac-Marković, Milica B., Janaćković, Đorđe, Matović, Branko, "Sol-gel synthesis and characterization of iron doped mullite" in Journal of Alloys and Compounds, 612 (2014):259-264,
https://doi.org/10.1016/j.jallcom.2014.05.204 . .