TY  - JOUR
AU  - Radovanović, Željko
AU  - Veljović, Đorđe
AU  - Radovanović, Lidija
AU  - Zalite, Ilmars
AU  - Palcevskis, Eriks
AU  - Petrović, Rada
AU  - Janaćković, Đorđe
PY  - 2018
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3790
AB  - Green hydroxyapatite ceramics were obtained by cold uniaxial and isostatic pressing of hydrothermally synthesized powders, pure hydroxyapatite and hydroxyapatite doped with Ag+, Cu2+ and Zn2+ ions. The ceramics were conventionally and microwave sintered and analyzed by Fourier transform infrared spectroscopy, field emission scanning electron microscopy, X-ray diffraction analysis, and energy-dispersive X-ray spectroscopy. The effect of doping on the mechanical properties of the obtained hydroxyapatite/tricakium phosphate ceramics was examined by comparing their average grain size, porosity and values of the hardness and fracture toughness. The results showed that doping with Cu(2+ )ions caused the lowest porosity of the ceramics and the highest values of hardness and fracture toughness. The ceramics obtained from hydroxyapatite doped with Ag( )(+)and Zn2+ ions exhibited worse mechanical properties due to the higher porosity even in the case of microwave sintering, which provide denser ceramics than conventional sintering.
PB  - University of Novi Sad, Faculty of Technology
T2  - Processing and Application of Ceramics
T1  - Ag+, Cu2+ and Zn2+ doped hydroxyapatite/tricalcium phosphate bioceramics: Influence of doping and sintering technique on mechanical properties
EP  - 276
IS  - 3
SP  - 268
VL  - 12
DO  - 10.2298/PAC1803268R
ER  - 

@article{
author = "Radovanović, Željko and Veljović, Đorđe and Radovanović, Lidija and Zalite, Ilmars and Palcevskis, Eriks and Petrović, Rada and Janaćković, Đorđe",
year = "2018",
abstract = "Green hydroxyapatite ceramics were obtained by cold uniaxial and isostatic pressing of hydrothermally synthesized powders, pure hydroxyapatite and hydroxyapatite doped with Ag+, Cu2+ and Zn2+ ions. The ceramics were conventionally and microwave sintered and analyzed by Fourier transform infrared spectroscopy, field emission scanning electron microscopy, X-ray diffraction analysis, and energy-dispersive X-ray spectroscopy. The effect of doping on the mechanical properties of the obtained hydroxyapatite/tricakium phosphate ceramics was examined by comparing their average grain size, porosity and values of the hardness and fracture toughness. The results showed that doping with Cu(2+ )ions caused the lowest porosity of the ceramics and the highest values of hardness and fracture toughness. The ceramics obtained from hydroxyapatite doped with Ag( )(+)and Zn2+ ions exhibited worse mechanical properties due to the higher porosity even in the case of microwave sintering, which provide denser ceramics than conventional sintering.",
publisher = "University of Novi Sad, Faculty of Technology",
journal = "Processing and Application of Ceramics",
title = "Ag+, Cu2+ and Zn2+ doped hydroxyapatite/tricalcium phosphate bioceramics: Influence of doping and sintering technique on mechanical properties",
pages = "276-268",
number = "3",
volume = "12",
doi = "10.2298/PAC1803268R"
}

Radovanović, Ž., Veljović, Đ., Radovanović, L., Zalite, I., Palcevskis, E., Petrović, R.,& Janaćković, Đ.. (2018). Ag+, Cu2+ and Zn2+ doped hydroxyapatite/tricalcium phosphate bioceramics: Influence of doping and sintering technique on mechanical properties. in Processing and Application of Ceramics
University of Novi Sad, Faculty of Technology., 12(3), 268-276.
https://doi.org/10.2298/PAC1803268R

Radovanović Ž, Veljović Đ, Radovanović L, Zalite I, Palcevskis E, Petrović R, Janaćković Đ. Ag+, Cu2+ and Zn2+ doped hydroxyapatite/tricalcium phosphate bioceramics: Influence of doping and sintering technique on mechanical properties. in Processing and Application of Ceramics. 2018;12(3):268-276.
doi:10.2298/PAC1803268R .

Radovanović, Željko, Veljović, Đorđe, Radovanović, Lidija, Zalite, Ilmars, Palcevskis, Eriks, Petrović, Rada, Janaćković, Đorđe, "Ag+, Cu2+ and Zn2+ doped hydroxyapatite/tricalcium phosphate bioceramics: Influence of doping and sintering technique on mechanical properties" in Processing and Application of Ceramics, 12, no. 3 (2018):268-276,
https://doi.org/10.2298/PAC1803268R . .

TY  - JOUR
AU  - Veljović, Đorđe
AU  - Palcevskis, Eriks
AU  - Zalite, Ilmars
AU  - Petrović, Rada
AU  - Janaćković, Đorđe
PY  - 2013
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2537
AB  - Two-step microwave sintering was applied in this study to process dense nano-structured bioceramics coupled with improved mechanical properties. The decrease in the average grain size to the nanolevel resulting from decreasing the sintering temperature to 850 degrees C during two-step microwave sintering, led to an increase in the fracture toughness compared to conventionally two-step sintered bioceramic. The two-step microwave sintering could be a promising technique for the processing of nanostructured HAP bioceramics.
PB  - Elsevier Science Bv, Amsterdam
T2  - Materials Letters
T1  - Two-step microwave sintering-A promising technique for the processing of nanostructured bioceramics
EP  - 253
SP  - 251
VL  - 93
DO  - 10.1016/j.matlet.2012.11.095
ER  - 

@article{
author = "Veljović, Đorđe and Palcevskis, Eriks and Zalite, Ilmars and Petrović, Rada and Janaćković, Đorđe",
year = "2013",
abstract = "Two-step microwave sintering was applied in this study to process dense nano-structured bioceramics coupled with improved mechanical properties. The decrease in the average grain size to the nanolevel resulting from decreasing the sintering temperature to 850 degrees C during two-step microwave sintering, led to an increase in the fracture toughness compared to conventionally two-step sintered bioceramic. The two-step microwave sintering could be a promising technique for the processing of nanostructured HAP bioceramics.",
publisher = "Elsevier Science Bv, Amsterdam",
journal = "Materials Letters",
title = "Two-step microwave sintering-A promising technique for the processing of nanostructured bioceramics",
pages = "253-251",
volume = "93",
doi = "10.1016/j.matlet.2012.11.095"
}

Veljović, Đ., Palcevskis, E., Zalite, I., Petrović, R.,& Janaćković, Đ.. (2013). Two-step microwave sintering-A promising technique for the processing of nanostructured bioceramics. in Materials Letters
Elsevier Science Bv, Amsterdam., 93, 251-253.
https://doi.org/10.1016/j.matlet.2012.11.095

Veljović Đ, Palcevskis E, Zalite I, Petrović R, Janaćković Đ. Two-step microwave sintering-A promising technique for the processing of nanostructured bioceramics. in Materials Letters. 2013;93:251-253.
doi:10.1016/j.matlet.2012.11.095 .

Veljović, Đorđe, Palcevskis, Eriks, Zalite, Ilmars, Petrović, Rada, Janaćković, Đorđe, "Two-step microwave sintering-A promising technique for the processing of nanostructured bioceramics" in Materials Letters, 93 (2013):251-253,
https://doi.org/10.1016/j.matlet.2012.11.095 . .

TY  - JOUR
AU  - Veljović, Đorđe
AU  - Zalite, Ilmars
AU  - Palcevskis, Eriks
AU  - Smičiklas, Ivana D.
AU  - Petrović, Rada
AU  - Janaćković, Đorđe
PY  - 2010
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1683
AB  - The effect of microwave sintering conditions on the microstructure, phase composition and mechanical properties of materials based on hydroxyapatite (HAP) and tricalcium phosphate (TCP) was investigated. Fine grained monophase HAP and biphasic HAP/TCP biomaterials were processed starting from stoichiometric and calcium deficient nanosized HAP powders. The HAP samples microwave (MAT) sintered for 15 min at 900 degrees C, with average grain size of 130 nm, showed better densification, higher density and certainly higher hardness and fracture toughness than samples conventionally sintered for 2 h at the same temperature. By comparing MW sintered HAP and HAP/TCP samples, it was concluded that pure HAP ceramics have superior mechanical properties. For monophase MW sintered HAP samples, the decrease in the grain size from 1.59 mu m to 130 nm led to an increase in the fracture toughness from 0.85 MPa m(1/2) to 1.3 MPa m(1/2).
PB  - Elsevier Sci Ltd, Oxford
T2  - Ceramics International
T1  - Microwave sintering of fine grained HAP and HAP/TCP bioceramics
EP  - 603
IS  - 2
SP  - 595
VL  - 36
DO  - 10.1016/j.ceramint.2009.09.038
ER  - 

@article{
author = "Veljović, Đorđe and Zalite, Ilmars and Palcevskis, Eriks and Smičiklas, Ivana D. and Petrović, Rada and Janaćković, Đorđe",
year = "2010",
abstract = "The effect of microwave sintering conditions on the microstructure, phase composition and mechanical properties of materials based on hydroxyapatite (HAP) and tricalcium phosphate (TCP) was investigated. Fine grained monophase HAP and biphasic HAP/TCP biomaterials were processed starting from stoichiometric and calcium deficient nanosized HAP powders. The HAP samples microwave (MAT) sintered for 15 min at 900 degrees C, with average grain size of 130 nm, showed better densification, higher density and certainly higher hardness and fracture toughness than samples conventionally sintered for 2 h at the same temperature. By comparing MW sintered HAP and HAP/TCP samples, it was concluded that pure HAP ceramics have superior mechanical properties. For monophase MW sintered HAP samples, the decrease in the grain size from 1.59 mu m to 130 nm led to an increase in the fracture toughness from 0.85 MPa m(1/2) to 1.3 MPa m(1/2).",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Ceramics International",
title = "Microwave sintering of fine grained HAP and HAP/TCP bioceramics",
pages = "603-595",
number = "2",
volume = "36",
doi = "10.1016/j.ceramint.2009.09.038"
}

Veljović, Đ., Zalite, I., Palcevskis, E., Smičiklas, I. D., Petrović, R.,& Janaćković, Đ.. (2010). Microwave sintering of fine grained HAP and HAP/TCP bioceramics. in Ceramics International
Elsevier Sci Ltd, Oxford., 36(2), 595-603.
https://doi.org/10.1016/j.ceramint.2009.09.038

Veljović Đ, Zalite I, Palcevskis E, Smičiklas ID, Petrović R, Janaćković Đ. Microwave sintering of fine grained HAP and HAP/TCP bioceramics. in Ceramics International. 2010;36(2):595-603.
doi:10.1016/j.ceramint.2009.09.038 .

Veljović, Đorđe, Zalite, Ilmars, Palcevskis, Eriks, Smičiklas, Ivana D., Petrović, Rada, Janaćković, Đorđe, "Microwave sintering of fine grained HAP and HAP/TCP bioceramics" in Ceramics International, 36, no. 2 (2010):595-603,
https://doi.org/10.1016/j.ceramint.2009.09.038 . .