TY  - JOUR
AU  - Kokunešoski, Maja
AU  - Šaponjić, Aleksandra
AU  - Stanković, Miroslav
AU  - Majstorovic, Jelena
AU  - Egelja, Adela
AU  - Ilić, Svetlana
AU  - Matović, Branko
PY  - 2016
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1961
AB  - Porous silica ceramics were obtained at low forming pressure (40-80 MPa) and low sintering temperature (850-1300 degrees C) for 4 h in air. Boric acid was used as a low-cost additive, in the amount of 2 wt%. Relatively high porosities of nearly 40% and 65% are obtained for the samples of clay and diatomite pressed at 40 MPa, and sintered at 1000 degrees C, respectively. The samples sintered at 1150 degrees C and 1300 degrees C have the average pore size diameters in the range of macroporous for clay 0.2-10 m and for diatomite 0.2-5 m. X-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy, and mercury porosimetry measurements were employed to characterize of the obtained samples. Measurements of densities and open porosities by immersion technique were used, according to the Archimedes principle. The relations between mechanical characteristics of the samples formed by using different pressures and sintered at different temperature, were discussed.
PB  - Elsevier Sci Ltd, Oxford
T2  - Ceramics International
T1  - Effect of boric acid on the porosity of clay and diatomite monoliths
VL  - 42
IS  - 5
SP  - 6383
EP  - 6390
DO  - 10.1016/j.ceramint.2016.01.034
ER  - 

@article{
author = "Kokunešoski, Maja and Šaponjić, Aleksandra and Stanković, Miroslav and Majstorovic, Jelena and Egelja, Adela and Ilić, Svetlana and Matović, Branko",
year = "2016",
abstract = "Porous silica ceramics were obtained at low forming pressure (40-80 MPa) and low sintering temperature (850-1300 degrees C) for 4 h in air. Boric acid was used as a low-cost additive, in the amount of 2 wt%. Relatively high porosities of nearly 40% and 65% are obtained for the samples of clay and diatomite pressed at 40 MPa, and sintered at 1000 degrees C, respectively. The samples sintered at 1150 degrees C and 1300 degrees C have the average pore size diameters in the range of macroporous for clay 0.2-10 m and for diatomite 0.2-5 m. X-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy, and mercury porosimetry measurements were employed to characterize of the obtained samples. Measurements of densities and open porosities by immersion technique were used, according to the Archimedes principle. The relations between mechanical characteristics of the samples formed by using different pressures and sintered at different temperature, were discussed.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Ceramics International",
title = "Effect of boric acid on the porosity of clay and diatomite monoliths",
volume = "42",
number = "5",
pages = "6383-6390",
doi = "10.1016/j.ceramint.2016.01.034"
}

Kokunešoski, M., Šaponjić, A., Stanković, M., Majstorovic, J., Egelja, A., Ilić, S.,& Matović, B.. (2016). Effect of boric acid on the porosity of clay and diatomite monoliths. in Ceramics International
Elsevier Sci Ltd, Oxford., 42(5), 6383-6390.
https://doi.org/10.1016/j.ceramint.2016.01.034

Kokunešoski M, Šaponjić A, Stanković M, Majstorovic J, Egelja A, Ilić S, Matović B. Effect of boric acid on the porosity of clay and diatomite monoliths. in Ceramics International. 2016;42(5):6383-6390.
doi:10.1016/j.ceramint.2016.01.034 .

Kokunešoski, Maja, Šaponjić, Aleksandra, Stanković, Miroslav, Majstorovic, Jelena, Egelja, Adela, Ilić, Svetlana, Matović, Branko, "Effect of boric acid on the porosity of clay and diatomite monoliths" in Ceramics International, 42, no. 5 (2016):6383-6390,
https://doi.org/10.1016/j.ceramint.2016.01.034 . .

TY  - JOUR
AU  - Egelja, Adela
AU  - Majstorovic, Jelena
AU  - Vukovic, Nikola
AU  - Stanković, Miroslav
AU  - Bucevac, Dusan
PY  - 2016
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2046
AB  - Al2O3-YAG composite was obtained by sintering of porous Al2O3 preforms infiltrated with water solution of aluminium nitrate nonahydrate, Al(NO3)(3)center dot 9H(2)O and yttrium nitrate hexahydrate, Y(NO3)(3)center dot 6H(2)O. Al2O3 preforms with porosity varying from 26 to 50% were obtained after sintering at temperature ranging from 1100 to 1500 degrees C. Sintering of the infiltrated Al2O3 preforms led to formation of YAG particles due to reaction between Y2O3 and Al2O3 at high temperature. It was found that variation of porosity of alumina preforms and sintering temperature is an effective way to fabricate Al2O3-YAG composite with an unusual combination of properties. Open porosity was in the range 15-35%, specific surface was 0.6-6.1 m(2)/g, pore size was 150-900 nm whereas compressive strength was from 50 to 250 MPa. The effect of sintering temperature on YAG formation and phase composition were investigated using X-ray diffractometry whereas microstructure of the composite was analysed by scanning electron microscopy.
PB  - International Institute for the Science of Sintering, Beograd
T2  - Science of Sintering
T1  - Synthesis of Highly Porous Al2O3-YAG Composite Ceramics
VL  - 48
IS  - 3
SP  - 303
EP  - 315
DO  - 10.2298/SOS1603303E
ER  - 

@article{
author = "Egelja, Adela and Majstorovic, Jelena and Vukovic, Nikola and Stanković, Miroslav and Bucevac, Dusan",
year = "2016",
abstract = "Al2O3-YAG composite was obtained by sintering of porous Al2O3 preforms infiltrated with water solution of aluminium nitrate nonahydrate, Al(NO3)(3)center dot 9H(2)O and yttrium nitrate hexahydrate, Y(NO3)(3)center dot 6H(2)O. Al2O3 preforms with porosity varying from 26 to 50% were obtained after sintering at temperature ranging from 1100 to 1500 degrees C. Sintering of the infiltrated Al2O3 preforms led to formation of YAG particles due to reaction between Y2O3 and Al2O3 at high temperature. It was found that variation of porosity of alumina preforms and sintering temperature is an effective way to fabricate Al2O3-YAG composite with an unusual combination of properties. Open porosity was in the range 15-35%, specific surface was 0.6-6.1 m(2)/g, pore size was 150-900 nm whereas compressive strength was from 50 to 250 MPa. The effect of sintering temperature on YAG formation and phase composition were investigated using X-ray diffractometry whereas microstructure of the composite was analysed by scanning electron microscopy.",
publisher = "International Institute for the Science of Sintering, Beograd",
journal = "Science of Sintering",
title = "Synthesis of Highly Porous Al2O3-YAG Composite Ceramics",
volume = "48",
number = "3",
pages = "303-315",
doi = "10.2298/SOS1603303E"
}

Egelja, A., Majstorovic, J., Vukovic, N., Stanković, M.,& Bucevac, D.. (2016). Synthesis of Highly Porous Al2O3-YAG Composite Ceramics. in Science of Sintering
International Institute for the Science of Sintering, Beograd., 48(3), 303-315.
https://doi.org/10.2298/SOS1603303E

Egelja A, Majstorovic J, Vukovic N, Stanković M, Bucevac D. Synthesis of Highly Porous Al2O3-YAG Composite Ceramics. in Science of Sintering. 2016;48(3):303-315.
doi:10.2298/SOS1603303E .

Egelja, Adela, Majstorovic, Jelena, Vukovic, Nikola, Stanković, Miroslav, Bucevac, Dusan, "Synthesis of Highly Porous Al2O3-YAG Composite Ceramics" in Science of Sintering, 48, no. 3 (2016):303-315,
https://doi.org/10.2298/SOS1603303E . .

TY  - JOUR
AU  - Šaponjić, Aleksandra
AU  - Stanković, Miroslav
AU  - Majstorovic, Jelena
AU  - Matović, Branko
AU  - Ilić, Svetlana
AU  - Egelja, Adela
AU  - Kokunešoski, Maja
PY  - 2015
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1654
AB  - Porous silica ceramics were obtained at low forming pressure and low sintering temperature by using diatomaceous earth as a silica source and boric acid as an inexpensive additive. The starting raw material, diatomite from surface coal mine Kolubara, Serbia, was purified from organic and inorganic impurities by using heat and chemical treatment. Boric acid was used as binding and sintering aid up to 2 wt%. Powder was compacted by using different pressures of 40, 60 and 80 MPa. The pressed samples were sintered at 850, 1000, 1150, and 1300 degrees C for 4 h in air. A relatively high porosity in the range of 60-70% is obtained for the samples pressed at 40, 60 and 80 MPa and sintered at 1000 degrees C. Median pore size diameters are in the range of macroporous up to 2 mu m in the samples sintered at 1150 and 1300 degrees C. X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, scaning electron microscopy (SEM) and mercury porosimetry measurements were employed to characterize the phases, functional groups, microstructure and pore size distribution of the obtained samples. In addition, measurements of densities and open porosities by immersion technique, according to Archimedes principle, were used. The relations between mechanical properties (Young modulus, Poisson ratio, and compressive strength) versus content of boric acid in the investigated samples were studied and disscussed.
PB  - Elsevier Sci Ltd, Oxford
T2  - Ceramics International
T1  - Porous ceramic monoliths based on diatomite
VL  - 41
IS  - 8
SP  - 9745
EP  - 9752
DO  - 10.1016/j.ceramint.2015.04.046
ER  - 

@article{
author = "Šaponjić, Aleksandra and Stanković, Miroslav and Majstorovic, Jelena and Matović, Branko and Ilić, Svetlana and Egelja, Adela and Kokunešoski, Maja",
year = "2015",
abstract = "Porous silica ceramics were obtained at low forming pressure and low sintering temperature by using diatomaceous earth as a silica source and boric acid as an inexpensive additive. The starting raw material, diatomite from surface coal mine Kolubara, Serbia, was purified from organic and inorganic impurities by using heat and chemical treatment. Boric acid was used as binding and sintering aid up to 2 wt%. Powder was compacted by using different pressures of 40, 60 and 80 MPa. The pressed samples were sintered at 850, 1000, 1150, and 1300 degrees C for 4 h in air. A relatively high porosity in the range of 60-70% is obtained for the samples pressed at 40, 60 and 80 MPa and sintered at 1000 degrees C. Median pore size diameters are in the range of macroporous up to 2 mu m in the samples sintered at 1150 and 1300 degrees C. X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, scaning electron microscopy (SEM) and mercury porosimetry measurements were employed to characterize the phases, functional groups, microstructure and pore size distribution of the obtained samples. In addition, measurements of densities and open porosities by immersion technique, according to Archimedes principle, were used. The relations between mechanical properties (Young modulus, Poisson ratio, and compressive strength) versus content of boric acid in the investigated samples were studied and disscussed.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Ceramics International",
title = "Porous ceramic monoliths based on diatomite",
volume = "41",
number = "8",
pages = "9745-9752",
doi = "10.1016/j.ceramint.2015.04.046"
}

Šaponjić, A., Stanković, M., Majstorovic, J., Matović, B., Ilić, S., Egelja, A.,& Kokunešoski, M.. (2015). Porous ceramic monoliths based on diatomite. in Ceramics International
Elsevier Sci Ltd, Oxford., 41(8), 9745-9752.
https://doi.org/10.1016/j.ceramint.2015.04.046

Šaponjić A, Stanković M, Majstorovic J, Matović B, Ilić S, Egelja A, Kokunešoski M. Porous ceramic monoliths based on diatomite. in Ceramics International. 2015;41(8):9745-9752.
doi:10.1016/j.ceramint.2015.04.046 .

Šaponjić, Aleksandra, Stanković, Miroslav, Majstorovic, Jelena, Matović, Branko, Ilić, Svetlana, Egelja, Adela, Kokunešoski, Maja, "Porous ceramic monoliths based on diatomite" in Ceramics International, 41, no. 8 (2015):9745-9752,
https://doi.org/10.1016/j.ceramint.2015.04.046 . .

TY  - JOUR
AU  - Kokunešoski, Maja
AU  - Šaponjić, Aleksandra
AU  - Maksimović, Vesna M.
AU  - Stanković, Miroslav
AU  - Pavlović, Mirjana
AU  - Pantic, Jelena
AU  - Majstorovic, Jelena
PY  - 2014
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1432
AB  - Intention of this work was to obtain porous silicon dioxide ceramics by using boric acid as an inexpensive additive at low forming pressure and low sintering temperature. Starting raw material, smectite clay from surface coal mine Kolubara, Serbia, was purified from organic and inorganic impurities by using heat and chemical treatment. Boric acid was used as binding and sintering aid in amount of 0.5, 1 and 2 wt%. Powder was compacted by using different pressures: 40, 60 and 80 MPa. Pressed samples were sintered at 850, 1000, 1150, and 1300 degrees C for 4 h in air. A relatively high porosity of nearly 40% is obtained for the samples pressed at 40, 60 and 80 MPa and sintered at 1000 degrees C. Median pore size diameters are in the range of macroporous up to 0.2 mu m and 10 mu m in the samples sintered at 1150 and 1300 degrees C, respectively. X-ray diffraction (XRD), scaning electron microscopy (SEM), and porosimetry measurements were employed to characterize the phases and microstructure of the obtained ceramics. The relations between mechanical characteristics of samples (Young modulus and Poisson ratio) and content of boric acid were studied.
PB  - Elsevier Sci Ltd, Oxford
T2  - Ceramics International
T1  - Preparation and characterization of clay-based porous ceramics with boric acid as additive
VL  - 40
IS  - 9
SP  - 14191
EP  - 14196
DO  - 10.1016/j.ceramint.2014.06.007
ER  - 

@article{
author = "Kokunešoski, Maja and Šaponjić, Aleksandra and Maksimović, Vesna M. and Stanković, Miroslav and Pavlović, Mirjana and Pantic, Jelena and Majstorovic, Jelena",
year = "2014",
abstract = "Intention of this work was to obtain porous silicon dioxide ceramics by using boric acid as an inexpensive additive at low forming pressure and low sintering temperature. Starting raw material, smectite clay from surface coal mine Kolubara, Serbia, was purified from organic and inorganic impurities by using heat and chemical treatment. Boric acid was used as binding and sintering aid in amount of 0.5, 1 and 2 wt%. Powder was compacted by using different pressures: 40, 60 and 80 MPa. Pressed samples were sintered at 850, 1000, 1150, and 1300 degrees C for 4 h in air. A relatively high porosity of nearly 40% is obtained for the samples pressed at 40, 60 and 80 MPa and sintered at 1000 degrees C. Median pore size diameters are in the range of macroporous up to 0.2 mu m and 10 mu m in the samples sintered at 1150 and 1300 degrees C, respectively. X-ray diffraction (XRD), scaning electron microscopy (SEM), and porosimetry measurements were employed to characterize the phases and microstructure of the obtained ceramics. The relations between mechanical characteristics of samples (Young modulus and Poisson ratio) and content of boric acid were studied.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Ceramics International",
title = "Preparation and characterization of clay-based porous ceramics with boric acid as additive",
volume = "40",
number = "9",
pages = "14191-14196",
doi = "10.1016/j.ceramint.2014.06.007"
}

Kokunešoski, M., Šaponjić, A., Maksimović, V. M., Stanković, M., Pavlović, M., Pantic, J.,& Majstorovic, J.. (2014). Preparation and characterization of clay-based porous ceramics with boric acid as additive. in Ceramics International
Elsevier Sci Ltd, Oxford., 40(9), 14191-14196.
https://doi.org/10.1016/j.ceramint.2014.06.007

Kokunešoski M, Šaponjić A, Maksimović VM, Stanković M, Pavlović M, Pantic J, Majstorovic J. Preparation and characterization of clay-based porous ceramics with boric acid as additive. in Ceramics International. 2014;40(9):14191-14196.
doi:10.1016/j.ceramint.2014.06.007 .

Kokunešoski, Maja, Šaponjić, Aleksandra, Maksimović, Vesna M., Stanković, Miroslav, Pavlović, Mirjana, Pantic, Jelena, Majstorovic, Jelena, "Preparation and characterization of clay-based porous ceramics with boric acid as additive" in Ceramics International, 40, no. 9 (2014):14191-14196,
https://doi.org/10.1016/j.ceramint.2014.06.007 . .