TY  - JOUR
AU  - Brajović, Dragan
AU  - Jokanović, Bojan
AU  - Bebić, Milan
AU  - Kartalović, Nenad
AU  - Nikezić, Dušan P.
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10642
AB  - The study aims to achieve a simple, reliable, and significant lifetime extension of the high-voltage asynchronous machine in relation to the voltage endurance test. To achieve this goal, the focus was on achieving longer-lasting and more stable insulation of the stator package of an asynchronous machine. Longer-lasting and more stable insulation of a stator is achieved by reinforcing the weak points on its prefabricated multiturn coils. These reinforcements were performed with standard insulating materials that are used for the production of the prefabricated multiturn coils (because there is no data regarding the long-term behavior of new materials that show some better properties in laboratories, but only during short-term tests). With such reinforced weak spots based on prefabricated models, they were made by the classical procedure with the use of standardized tools. To track the effects of the improvement of the insulation characteristics of a stator, an algorithm was developed based on the law of increasing probability and the determination of lifetime curves to the voltage endurance test. The lifetime curves were determined by the method of increasing voltage with the transformation of the obtained results to the corresponding results by the constant voltage method. The applied algorithm that was formed for this study, had been verified with statistical reliability of 95%. The combined measurement uncertainty of the measurement procedure was about 5%.
T2  - Electrical Engineering
T1  - Lifetime extension of the high voltage asynchronous machine in relation to the voltage endurance test
VL  - 105
SP  - 1643
EP  - 1653
DO  - 10.1007/s00202-023-01767-w
ER  - 

@article{
author = "Brajović, Dragan and Jokanović, Bojan and Bebić, Milan and Kartalović, Nenad and Nikezić, Dušan P.",
year = "2023",
abstract = "The study aims to achieve a simple, reliable, and significant lifetime extension of the high-voltage asynchronous machine in relation to the voltage endurance test. To achieve this goal, the focus was on achieving longer-lasting and more stable insulation of the stator package of an asynchronous machine. Longer-lasting and more stable insulation of a stator is achieved by reinforcing the weak points on its prefabricated multiturn coils. These reinforcements were performed with standard insulating materials that are used for the production of the prefabricated multiturn coils (because there is no data regarding the long-term behavior of new materials that show some better properties in laboratories, but only during short-term tests). With such reinforced weak spots based on prefabricated models, they were made by the classical procedure with the use of standardized tools. To track the effects of the improvement of the insulation characteristics of a stator, an algorithm was developed based on the law of increasing probability and the determination of lifetime curves to the voltage endurance test. The lifetime curves were determined by the method of increasing voltage with the transformation of the obtained results to the corresponding results by the constant voltage method. The applied algorithm that was formed for this study, had been verified with statistical reliability of 95%. The combined measurement uncertainty of the measurement procedure was about 5%.",
journal = "Electrical Engineering",
title = "Lifetime extension of the high voltage asynchronous machine in relation to the voltage endurance test",
volume = "105",
pages = "1643-1653",
doi = "10.1007/s00202-023-01767-w"
}

Brajović, D., Jokanović, B., Bebić, M., Kartalović, N.,& Nikezić, D. P.. (2023). Lifetime extension of the high voltage asynchronous machine in relation to the voltage endurance test. in Electrical Engineering, 105, 1643-1653.
https://doi.org/10.1007/s00202-023-01767-w

Brajović D, Jokanović B, Bebić M, Kartalović N, Nikezić DP. Lifetime extension of the high voltage asynchronous machine in relation to the voltage endurance test. in Electrical Engineering. 2023;105:1643-1653.
doi:10.1007/s00202-023-01767-w .

Brajović, Dragan, Jokanović, Bojan, Bebić, Milan, Kartalović, Nenad, Nikezić, Dušan P., "Lifetime extension of the high voltage asynchronous machine in relation to the voltage endurance test" in Electrical Engineering, 105 (2023):1643-1653,
https://doi.org/10.1007/s00202-023-01767-w . .

TY  - JOUR
AU  - Brajović, Dragan
AU  - Jokanović, Bojan
AU  - Bebić, Milan
AU  - Kartalović, Nenad
AU  - Nikezić, Dušan P.
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10648
AB  - The study aims to achieve a simple, reliable, and significant lifetime extension of the high-voltage asynchronous machine in relation to the voltage endurance test. To achieve this goal, the focus was on achieving longer-lasting and more stable insulation of the stator package of an asynchronous machine. Longer-lasting and more stable insulation of a stator is achieved by reinforcing the weak points on its prefabricated multiturn coils. These reinforcements were performed with standard insulating materials that are used for the production of the prefabricated multiturn coils (because there is no data regarding the long-term behavior of new materials that show some better properties in laboratories, but only during short-term tests). With such reinforced weak spots based on prefabricated models, they were made by the classical procedure with the use of standardized tools. To track the effects of the improvement of the insulation characteristics of a stator, an algorithm was developed based on the law of increasing probability and the determination of lifetime curves to the voltage endurance test. The lifetime curves were determined by the method of increasing voltage with the transformation of the obtained results to the corresponding results by the constant voltage method. The applied algorithm that was formed for this study, had been verified with statistical reliability of 95%. The combined measurement uncertainty of the measurement procedure was about 5%.
T2  - Electrical Engineering
T1  - Lifetime extension of the high voltage asynchronous machine in relation to the voltage endurance test
VL  - 105
SP  - 1643
EP  - 1653
DO  - 10.21203/rs.3.rs-2254547/v1
ER  - 

@article{
author = "Brajović, Dragan and Jokanović, Bojan and Bebić, Milan and Kartalović, Nenad and Nikezić, Dušan P.",
year = "2023",
abstract = "The study aims to achieve a simple, reliable, and significant lifetime extension of the high-voltage asynchronous machine in relation to the voltage endurance test. To achieve this goal, the focus was on achieving longer-lasting and more stable insulation of the stator package of an asynchronous machine. Longer-lasting and more stable insulation of a stator is achieved by reinforcing the weak points on its prefabricated multiturn coils. These reinforcements were performed with standard insulating materials that are used for the production of the prefabricated multiturn coils (because there is no data regarding the long-term behavior of new materials that show some better properties in laboratories, but only during short-term tests). With such reinforced weak spots based on prefabricated models, they were made by the classical procedure with the use of standardized tools. To track the effects of the improvement of the insulation characteristics of a stator, an algorithm was developed based on the law of increasing probability and the determination of lifetime curves to the voltage endurance test. The lifetime curves were determined by the method of increasing voltage with the transformation of the obtained results to the corresponding results by the constant voltage method. The applied algorithm that was formed for this study, had been verified with statistical reliability of 95%. The combined measurement uncertainty of the measurement procedure was about 5%.",
journal = "Electrical Engineering",
title = "Lifetime extension of the high voltage asynchronous machine in relation to the voltage endurance test",
volume = "105",
pages = "1643-1653",
doi = "10.21203/rs.3.rs-2254547/v1"
}

Brajović, D., Jokanović, B., Bebić, M., Kartalović, N.,& Nikezić, D. P.. (2023). Lifetime extension of the high voltage asynchronous machine in relation to the voltage endurance test. in Electrical Engineering, 105, 1643-1653.
https://doi.org/10.21203/rs.3.rs-2254547/v1

Brajović D, Jokanović B, Bebić M, Kartalović N, Nikezić DP. Lifetime extension of the high voltage asynchronous machine in relation to the voltage endurance test. in Electrical Engineering. 2023;105:1643-1653.
doi:10.21203/rs.3.rs-2254547/v1 .

Brajović, Dragan, Jokanović, Bojan, Bebić, Milan, Kartalović, Nenad, Nikezić, Dušan P., "Lifetime extension of the high voltage asynchronous machine in relation to the voltage endurance test" in Electrical Engineering, 105 (2023):1643-1653,
https://doi.org/10.21203/rs.3.rs-2254547/v1 . .

TY  - JOUR
AU  - Jokanović, Vukoman R.
AU  - Bundaleski, Nenad
AU  - Petrović, Božana
AU  - Ferarra, Manuela
AU  - Jokanović, Bojan
AU  - Živković, Slavoljub
AU  - Nasov, Ilija
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10029
AB  - Thin films on the base of titanium oxynitrides and copper doped titanium nitride were obtained by a combination of different PVD techniques on the surface of glass substrate and their physicochemical properties were analyzed in details. Phase composition of the samples was analyzed by XRD and FTIR methods, while microstructure of the samples was analyzed by SEM. XPS was used for depth profiling of the samples, which enabled determination of the oxidative state of titanium and corresponding phases through various film layers from the surface to the substrate. The depth of the various layers and their extinction coefficients and refractory indexes were estimated by spectroscopic ellipsometry.
T2  - Vacuum
T1  - Detailed phisyco-chemical characterization of the multilayered thin films based on titanium oxynitride and copper doped titanium nitride obtained by different PVD techniques
VL  - 195
SP  - 110708
DO  - 10.1016/j.vacuum.2021.110708
ER  - 

@article{
author = "Jokanović, Vukoman R. and Bundaleski, Nenad and Petrović, Božana and Ferarra, Manuela and Jokanović, Bojan and Živković, Slavoljub and Nasov, Ilija",
year = "2022",
abstract = "Thin films on the base of titanium oxynitrides and copper doped titanium nitride were obtained by a combination of different PVD techniques on the surface of glass substrate and their physicochemical properties were analyzed in details. Phase composition of the samples was analyzed by XRD and FTIR methods, while microstructure of the samples was analyzed by SEM. XPS was used for depth profiling of the samples, which enabled determination of the oxidative state of titanium and corresponding phases through various film layers from the surface to the substrate. The depth of the various layers and their extinction coefficients and refractory indexes were estimated by spectroscopic ellipsometry.",
journal = "Vacuum",
title = "Detailed phisyco-chemical characterization of the multilayered thin films based on titanium oxynitride and copper doped titanium nitride obtained by different PVD techniques",
volume = "195",
pages = "110708",
doi = "10.1016/j.vacuum.2021.110708"
}

Jokanović, V. R., Bundaleski, N., Petrović, B., Ferarra, M., Jokanović, B., Živković, S.,& Nasov, I.. (2022). Detailed phisyco-chemical characterization of the multilayered thin films based on titanium oxynitride and copper doped titanium nitride obtained by different PVD techniques. in Vacuum, 195, 110708.
https://doi.org/10.1016/j.vacuum.2021.110708

Jokanović VR, Bundaleski N, Petrović B, Ferarra M, Jokanović B, Živković S, Nasov I. Detailed phisyco-chemical characterization of the multilayered thin films based on titanium oxynitride and copper doped titanium nitride obtained by different PVD techniques. in Vacuum. 2022;195:110708.
doi:10.1016/j.vacuum.2021.110708 .

Jokanović, Vukoman R., Bundaleski, Nenad, Petrović, Božana, Ferarra, Manuela, Jokanović, Bojan, Živković, Slavoljub, Nasov, Ilija, "Detailed phisyco-chemical characterization of the multilayered thin films based on titanium oxynitride and copper doped titanium nitride obtained by different PVD techniques" in Vacuum, 195 (2022):110708,
https://doi.org/10.1016/j.vacuum.2021.110708 . .

TY  - JOUR
AU  - Jokanović, Vukoman R.
AU  - Bundaleski, Nenad
AU  - Čolović, Božana M.
AU  - Ferarra, Manuela
AU  - Jokanović, Bojan
AU  - Nasov, Ilija
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9891
AB  - Physicochemical properties of thin films on the base of titanium oxides, obtained by a cathodic arc evaporation on the surface of glass substrate are analysed in details. The analysis of these films was made by using XRD, FTIR, SEM, XPS analysis and ellipsometry. On the basis of these analyses, particularly analysis obtained by XPS, the oxidative state Ti and corresponding phases are determined through various film layers from the surface to the substrate. The depth of the various levels and their extinction coefficients and refractory indexes are estimated by ellipsometry.
T2  - Zaštita materijala
T1  - Detailed characterization of the Ti-O based thin films obtained by cathodic arc evaporation
VL  - 62
IS  - 1
SP  - 41
EP  - 50
DO  - 10.5937/zasmat2101041J
ER  - 

@article{
author = "Jokanović, Vukoman R. and Bundaleski, Nenad and Čolović, Božana M. and Ferarra, Manuela and Jokanović, Bojan and Nasov, Ilija",
year = "2021",
abstract = "Physicochemical properties of thin films on the base of titanium oxides, obtained by a cathodic arc evaporation on the surface of glass substrate are analysed in details. The analysis of these films was made by using XRD, FTIR, SEM, XPS analysis and ellipsometry. On the basis of these analyses, particularly analysis obtained by XPS, the oxidative state Ti and corresponding phases are determined through various film layers from the surface to the substrate. The depth of the various levels and their extinction coefficients and refractory indexes are estimated by ellipsometry.",
journal = "Zaštita materijala",
title = "Detailed characterization of the Ti-O based thin films obtained by cathodic arc evaporation",
volume = "62",
number = "1",
pages = "41-50",
doi = "10.5937/zasmat2101041J"
}

Jokanović, V. R., Bundaleski, N., Čolović, B. M., Ferarra, M., Jokanović, B.,& Nasov, I.. (2021). Detailed characterization of the Ti-O based thin films obtained by cathodic arc evaporation. in Zaštita materijala, 62(1), 41-50.
https://doi.org/10.5937/zasmat2101041J

Jokanović VR, Bundaleski N, Čolović BM, Ferarra M, Jokanović B, Nasov I. Detailed characterization of the Ti-O based thin films obtained by cathodic arc evaporation. in Zaštita materijala. 2021;62(1):41-50.
doi:10.5937/zasmat2101041J .

Jokanović, Vukoman R., Bundaleski, Nenad, Čolović, Božana M., Ferarra, Manuela, Jokanović, Bojan, Nasov, Ilija, "Detailed characterization of the Ti-O based thin films obtained by cathodic arc evaporation" in Zaštita materijala, 62, no. 1 (2021):41-50,
https://doi.org/10.5937/zasmat2101041J . .

TY  - JOUR
AU  - Jokanović, Vukoman R.
AU  - Čolović, Božana M.
AU  - Trajkovska Petkoska, Anka
AU  - Mraković, Ana Đ.
AU  - Jokanović, Bojan
AU  - Nenadović, Miloš
AU  - Ferrara, Manuela
AU  - Nasov, Ilija
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1871
AB  - Structural and optical properties of nanometric titanium oxide (TixOy) films obtained by cathodic arc plasma deposition were investigated. Phase analysis by x-ray diffraction and Fourier-transform infrared spectroscopy showed the presence of anatase, rutile, Ti2O3, Ti4O7 and amorphous phases. Scanning electron microscopy images showed well-developed surface morphology with nano-patterns. Spectroscopic ellipsometry revealed film thicknesses of 53 and 50 nm, variable refractive indices dependent on the light wavelength and close to zero extinction coefficients for wavelengths higher than 500 nm. On the basis of ultraviolet-visible spectroscopy data and using the Tauc equation, band gap values for direct and indirect electron transitions were determined.
T2  - Plasma Science and Technology
T1  - Optical properties of titanium oxide films obtained by cathodic arc plasma deposition
VL  - 19
IS  - 12
DO  - 10.1088/2058-6272/aa8806
ER  - 

@article{
author = "Jokanović, Vukoman R. and Čolović, Božana M. and Trajkovska Petkoska, Anka and Mraković, Ana Đ. and Jokanović, Bojan and Nenadović, Miloš and Ferrara, Manuela and Nasov, Ilija",
year = "2017",
abstract = "Structural and optical properties of nanometric titanium oxide (TixOy) films obtained by cathodic arc plasma deposition were investigated. Phase analysis by x-ray diffraction and Fourier-transform infrared spectroscopy showed the presence of anatase, rutile, Ti2O3, Ti4O7 and amorphous phases. Scanning electron microscopy images showed well-developed surface morphology with nano-patterns. Spectroscopic ellipsometry revealed film thicknesses of 53 and 50 nm, variable refractive indices dependent on the light wavelength and close to zero extinction coefficients for wavelengths higher than 500 nm. On the basis of ultraviolet-visible spectroscopy data and using the Tauc equation, band gap values for direct and indirect electron transitions were determined.",
journal = "Plasma Science and Technology",
title = "Optical properties of titanium oxide films obtained by cathodic arc plasma deposition",
volume = "19",
number = "12",
doi = "10.1088/2058-6272/aa8806"
}

Jokanović, V. R., Čolović, B. M., Trajkovska Petkoska, A., Mraković, A. Đ., Jokanović, B., Nenadović, M., Ferrara, M.,& Nasov, I.. (2017). Optical properties of titanium oxide films obtained by cathodic arc plasma deposition. in Plasma Science and Technology, 19(12).
https://doi.org/10.1088/2058-6272/aa8806

Jokanović VR, Čolović BM, Trajkovska Petkoska A, Mraković AĐ, Jokanović B, Nenadović M, Ferrara M, Nasov I. Optical properties of titanium oxide films obtained by cathodic arc plasma deposition. in Plasma Science and Technology. 2017;19(12).
doi:10.1088/2058-6272/aa8806 .

Jokanović, Vukoman R., Čolović, Božana M., Trajkovska Petkoska, Anka, Mraković, Ana Đ., Jokanović, Bojan, Nenadović, Miloš, Ferrara, Manuela, Nasov, Ilija, "Optical properties of titanium oxide films obtained by cathodic arc plasma deposition" in Plasma Science and Technology, 19, no. 12 (2017),
https://doi.org/10.1088/2058-6272/aa8806 . .

TY  - JOUR
AU  - Jokanović, Vukoman R.
AU  - Nenadović, Miloš
AU  - Trajkovska Petkoska, Anka
AU  - Mitrić, Miodrag
AU  - Jokanović, Bojan
AU  - Nasov, Ilija
PY  - 2016
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1051
AB  - Metamaterials based on TixOy with ultra-high and near-zero refractive indices were obtained by DC magnetron sputtering. The data on refractive indices, extinction coefficients, film thickness, and band gaps, obtained by spectroscopic ellipsometry, showed very high potential of these materials as metamaterials. Phase analysis performed by XRD revealed the presence of titanium phases with lower titanium oxidation states resulting from high concentration of oxygen vacancies, which are crucial for such extraordinary jumps and drops of refractive indices. Numerous band gaps for direct and indirect electron transitions additionally confirmed unique properties of these materials.
T2  - Advances in Materials Science and Engineering
T1  - Ultra-High and Near-Zero Refractive Indices of Magnetron Sputtered Thin-Film Metamaterials Based on TixOy
DO  - 10.1155/2016/4565493
ER  - 

@article{
author = "Jokanović, Vukoman R. and Nenadović, Miloš and Trajkovska Petkoska, Anka and Mitrić, Miodrag and Jokanović, Bojan and Nasov, Ilija",
year = "2016",
abstract = "Metamaterials based on TixOy with ultra-high and near-zero refractive indices were obtained by DC magnetron sputtering. The data on refractive indices, extinction coefficients, film thickness, and band gaps, obtained by spectroscopic ellipsometry, showed very high potential of these materials as metamaterials. Phase analysis performed by XRD revealed the presence of titanium phases with lower titanium oxidation states resulting from high concentration of oxygen vacancies, which are crucial for such extraordinary jumps and drops of refractive indices. Numerous band gaps for direct and indirect electron transitions additionally confirmed unique properties of these materials.",
journal = "Advances in Materials Science and Engineering",
title = "Ultra-High and Near-Zero Refractive Indices of Magnetron Sputtered Thin-Film Metamaterials Based on TixOy",
doi = "10.1155/2016/4565493"
}

Jokanović, V. R., Nenadović, M., Trajkovska Petkoska, A., Mitrić, M., Jokanović, B.,& Nasov, I.. (2016). Ultra-High and Near-Zero Refractive Indices of Magnetron Sputtered Thin-Film Metamaterials Based on TixOy. in Advances in Materials Science and Engineering.
https://doi.org/10.1155/2016/4565493

Jokanović VR, Nenadović M, Trajkovska Petkoska A, Mitrić M, Jokanović B, Nasov I. Ultra-High and Near-Zero Refractive Indices of Magnetron Sputtered Thin-Film Metamaterials Based on TixOy. in Advances in Materials Science and Engineering. 2016;.
doi:10.1155/2016/4565493 .

Jokanović, Vukoman R., Nenadović, Miloš, Trajkovska Petkoska, Anka, Mitrić, Miodrag, Jokanović, Bojan, Nasov, Ilija, "Ultra-High and Near-Zero Refractive Indices of Magnetron Sputtered Thin-Film Metamaterials Based on TixOy" in Advances in Materials Science and Engineering (2016),
https://doi.org/10.1155/2016/4565493 . .

TY  - JOUR
AU  - Jokanović, Vukoman R.
AU  - Čolović, Božana M.
AU  - Jokanović, Bojan
AU  - Zivkovic, Slavoljub
PY  - 2015
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/541
AB  - The aim of this study was to synthesize and characterize new superplastic endodontic mixtures (named as ALBO-MPSA) with strongly accelerated hydration rate. Two different ALBO-MPSA mixtures were prepared using combination of hydrothermal and high-temperature self-propagating method. Phase analysis of the mixtures, before and after hydration, was carried out by X-ray diffraction (XRD), while morphological analysis was performed by scanning electron microscopy (SEM). Investigations of mechanical properties showed that new superplastic, quick-bonding endodontic mixtures with good mechanical properties were obtained (compressive strength after 28days aging was from 35.7 +/- 0.5 and 37.4 +/- 0.5 MPa). The final phase compositions after hydration of the mixtures were determined on the base of XRD data, assumed mechanism of hydration and rational chemical analysis. The constitutive phases were tobermorite, portlandite, and amorphous Ca(OH)(2), ettringite and amorphous like ettringite phase, gypsum, hydroxyapatite and barite.
T2  - International Journal of Applied Ceramic Technology
T1  - Superplastic, Quick-Bonding Endodontic Mixtures and Their Hydration
VL  - 12
IS  - SI
SP  - E83
EP  - E91
DO  - 10.1111/ijac.12234
ER  - 

@article{
author = "Jokanović, Vukoman R. and Čolović, Božana M. and Jokanović, Bojan and Zivkovic, Slavoljub",
year = "2015",
abstract = "The aim of this study was to synthesize and characterize new superplastic endodontic mixtures (named as ALBO-MPSA) with strongly accelerated hydration rate. Two different ALBO-MPSA mixtures were prepared using combination of hydrothermal and high-temperature self-propagating method. Phase analysis of the mixtures, before and after hydration, was carried out by X-ray diffraction (XRD), while morphological analysis was performed by scanning electron microscopy (SEM). Investigations of mechanical properties showed that new superplastic, quick-bonding endodontic mixtures with good mechanical properties were obtained (compressive strength after 28days aging was from 35.7 +/- 0.5 and 37.4 +/- 0.5 MPa). The final phase compositions after hydration of the mixtures were determined on the base of XRD data, assumed mechanism of hydration and rational chemical analysis. The constitutive phases were tobermorite, portlandite, and amorphous Ca(OH)(2), ettringite and amorphous like ettringite phase, gypsum, hydroxyapatite and barite.",
journal = "International Journal of Applied Ceramic Technology",
title = "Superplastic, Quick-Bonding Endodontic Mixtures and Their Hydration",
volume = "12",
number = "SI",
pages = "E83-E91",
doi = "10.1111/ijac.12234"
}

Jokanović, V. R., Čolović, B. M., Jokanović, B.,& Zivkovic, S.. (2015). Superplastic, Quick-Bonding Endodontic Mixtures and Their Hydration. in International Journal of Applied Ceramic Technology, 12(SI), E83-E91.
https://doi.org/10.1111/ijac.12234

Jokanović VR, Čolović BM, Jokanović B, Zivkovic S. Superplastic, Quick-Bonding Endodontic Mixtures and Their Hydration. in International Journal of Applied Ceramic Technology. 2015;12(SI):E83-E91.
doi:10.1111/ijac.12234 .

Jokanović, Vukoman R., Čolović, Božana M., Jokanović, Bojan, Zivkovic, Slavoljub, "Superplastic, Quick-Bonding Endodontic Mixtures and Their Hydration" in International Journal of Applied Ceramic Technology, 12, no. SI (2015):E83-E91,
https://doi.org/10.1111/ijac.12234 . .

TY  - JOUR
AU  - Čolović, Božana M.
AU  - Jokanović, Vukoman R.
AU  - Jokanović, Bojan
AU  - Jović, Nataša G.
PY  - 2014
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5931
AB  - The biomimetic deposition of hydroxyapatite (HA) on the surface of SiO2 thin film coated metal substrates was developed and investigated. The structural investigations of HA were made by XRD and FTIR-ATR, while morphological and chemical changes during HA biomimetic deposition on the surfaces of silica thin films were investigated by SEM with EDS. The HA film thicknesses were estimated from the mass changes of samples including the corresponding correction of the pore volume inside of them, which was calculated by the Lecloux and Pirard method based on the Dollimore-Heal method. (c) 2013 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
T2  - Ceramics International
T1  - Biomimetic deposition of hydroxyapatite on the surface of silica thin film covered steel tape
VL  - 40
IS  - 5
SP  - 6949
EP  - 6955
DO  - 10.1016/j.ceramint.2013.12.018
ER  - 

@article{
author = "Čolović, Božana M. and Jokanović, Vukoman R. and Jokanović, Bojan and Jović, Nataša G.",
year = "2014",
abstract = "The biomimetic deposition of hydroxyapatite (HA) on the surface of SiO2 thin film coated metal substrates was developed and investigated. The structural investigations of HA were made by XRD and FTIR-ATR, while morphological and chemical changes during HA biomimetic deposition on the surfaces of silica thin films were investigated by SEM with EDS. The HA film thicknesses were estimated from the mass changes of samples including the corresponding correction of the pore volume inside of them, which was calculated by the Lecloux and Pirard method based on the Dollimore-Heal method. (c) 2013 Elsevier Ltd and Techna Group S.r.l. All rights reserved.",
journal = "Ceramics International",
title = "Biomimetic deposition of hydroxyapatite on the surface of silica thin film covered steel tape",
volume = "40",
number = "5",
pages = "6949-6955",
doi = "10.1016/j.ceramint.2013.12.018"
}

Čolović, B. M., Jokanović, V. R., Jokanović, B.,& Jović, N. G.. (2014). Biomimetic deposition of hydroxyapatite on the surface of silica thin film covered steel tape. in Ceramics International, 40(5), 6949-6955.
https://doi.org/10.1016/j.ceramint.2013.12.018

Čolović BM, Jokanović VR, Jokanović B, Jović NG. Biomimetic deposition of hydroxyapatite on the surface of silica thin film covered steel tape. in Ceramics International. 2014;40(5):6949-6955.
doi:10.1016/j.ceramint.2013.12.018 .

Čolović, Božana M., Jokanović, Vukoman R., Jokanović, Bojan, Jović, Nataša G., "Biomimetic deposition of hydroxyapatite on the surface of silica thin film covered steel tape" in Ceramics International, 40, no. 5 (2014):6949-6955,
https://doi.org/10.1016/j.ceramint.2013.12.018 . .

TY  - JOUR
AU  - Jokanović, Vukoman R.
AU  - Vilotijević, Miroljub N.
AU  - Jokanović, Bojan
AU  - Jenko, Monika
AU  - Anzel, Ivan
AU  - Stamenkovic, Dragoslav
AU  - Lazić, Vojkan
AU  - Rudolf, Rebeka
PY  - 2014
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5936
AB  - In this research, the structure changes along the depth gradient layers of titanium substrate, after etching with NaOH and subsequent thermal treatment at various temperatures between 300 and 800 degrees C, were investigated by XRD, FTIR and AES. Particularly, the changes of Ti substrate after etching with NaOH, subsequent ionic exchange of Na+ with Ca2+ ions and thermal treatment at 700 degrees C were analysed. Due to this approach, it was possible to get insight into the chemical changes and changes of Ti oxidation states and consequent phase analysis, along the depth of the titanium oxide coatings. In addition, Secondary Electron Imaging (SEI) showed very interesting nanotopology of all samples. Particularly interesting topology, consisting of very thin nano-designed walls between mutually interconnected pores, was observed for the sample in which Na+ were replaced with Ca2+ ions. This structure might be suitable for deposition of hydroxyapatite by biomimetic or plasma methods and as an appropriate scaffold for cell adhesion and proliferation. (C) 2014 Elsevier Ltd. All rights reserved.
T2  - Corrosion Science
T1  - Investigations of corrosion on the surface of titanium substrate caused by combined alkaline and heat treatment
VL  - 82
SP  - 180
EP  - 190
DO  - 10.1016/j.corsci.2014.01.014
ER  - 

@article{
author = "Jokanović, Vukoman R. and Vilotijević, Miroljub N. and Jokanović, Bojan and Jenko, Monika and Anzel, Ivan and Stamenkovic, Dragoslav and Lazić, Vojkan and Rudolf, Rebeka",
year = "2014",
abstract = "In this research, the structure changes along the depth gradient layers of titanium substrate, after etching with NaOH and subsequent thermal treatment at various temperatures between 300 and 800 degrees C, were investigated by XRD, FTIR and AES. Particularly, the changes of Ti substrate after etching with NaOH, subsequent ionic exchange of Na+ with Ca2+ ions and thermal treatment at 700 degrees C were analysed. Due to this approach, it was possible to get insight into the chemical changes and changes of Ti oxidation states and consequent phase analysis, along the depth of the titanium oxide coatings. In addition, Secondary Electron Imaging (SEI) showed very interesting nanotopology of all samples. Particularly interesting topology, consisting of very thin nano-designed walls between mutually interconnected pores, was observed for the sample in which Na+ were replaced with Ca2+ ions. This structure might be suitable for deposition of hydroxyapatite by biomimetic or plasma methods and as an appropriate scaffold for cell adhesion and proliferation. (C) 2014 Elsevier Ltd. All rights reserved.",
journal = "Corrosion Science",
title = "Investigations of corrosion on the surface of titanium substrate caused by combined alkaline and heat treatment",
volume = "82",
pages = "180-190",
doi = "10.1016/j.corsci.2014.01.014"
}

Jokanović, V. R., Vilotijević, M. N., Jokanović, B., Jenko, M., Anzel, I., Stamenkovic, D., Lazić, V.,& Rudolf, R.. (2014). Investigations of corrosion on the surface of titanium substrate caused by combined alkaline and heat treatment. in Corrosion Science, 82, 180-190.
https://doi.org/10.1016/j.corsci.2014.01.014

Jokanović VR, Vilotijević MN, Jokanović B, Jenko M, Anzel I, Stamenkovic D, Lazić V, Rudolf R. Investigations of corrosion on the surface of titanium substrate caused by combined alkaline and heat treatment. in Corrosion Science. 2014;82:180-190.
doi:10.1016/j.corsci.2014.01.014 .

Jokanović, Vukoman R., Vilotijević, Miroljub N., Jokanović, Bojan, Jenko, Monika, Anzel, Ivan, Stamenkovic, Dragoslav, Lazić, Vojkan, Rudolf, Rebeka, "Investigations of corrosion on the surface of titanium substrate caused by combined alkaline and heat treatment" in Corrosion Science, 82 (2014):180-190,
https://doi.org/10.1016/j.corsci.2014.01.014 . .

TY  - JOUR
AU  - Jokanović, Vukoman R.
AU  - Čolović, Božana M.
AU  - Jović, Nataša G.
AU  - Babić-Stojić, Branka S.
AU  - Jokanović, Bojan
PY  - 2013
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5737
AB  - Low-temperature synthesis of fluorapatite/fluorohydroxyapatite with precursor mixture previously mechanochemically treated is described in this article. Ethylene vinylacetate/versatate copolymer as a surface active substance was mechanically treated to obtain a core-shell system with strongly controlled grain size. Despite usual behavior of mechanically activated systems, only an amorphous phase formed from precursor ions present in the mixture composed of -Ca2P2O7, CaCO3, CaF2, and unreacted Ca(OH)(2) was obtained during milling for 5min to 8h. The mixture contained depots of labile F- ions conserved in micelles cages, which are useful for teeth protection from carries. For transformation of these amorphous phases into fluorapatite, an additional low thermal treatment was necessary. The mechanism of the precursor mixture transformation into fluorapatite during milling and thermal treatment was investigated using FTIR spectroscopy and X-ray diffraction. The morphology and size distribution of the obtained powders was studied using SEM and TEM.
T2  - International Journal of Applied Ceramic Technology
T1  - Mechanochemical and Low-Temperature Synthesis of Nanocrystalline Fluorohydroxyapatite/Fluorapatite
VL  - 10
IS  - 6
SP  - 957
EP  - 969
DO  - 10.1111/j.1744-7402.2012.02821.x
ER  - 

@article{
author = "Jokanović, Vukoman R. and Čolović, Božana M. and Jović, Nataša G. and Babić-Stojić, Branka S. and Jokanović, Bojan",
year = "2013",
abstract = "Low-temperature synthesis of fluorapatite/fluorohydroxyapatite with precursor mixture previously mechanochemically treated is described in this article. Ethylene vinylacetate/versatate copolymer as a surface active substance was mechanically treated to obtain a core-shell system with strongly controlled grain size. Despite usual behavior of mechanically activated systems, only an amorphous phase formed from precursor ions present in the mixture composed of -Ca2P2O7, CaCO3, CaF2, and unreacted Ca(OH)(2) was obtained during milling for 5min to 8h. The mixture contained depots of labile F- ions conserved in micelles cages, which are useful for teeth protection from carries. For transformation of these amorphous phases into fluorapatite, an additional low thermal treatment was necessary. The mechanism of the precursor mixture transformation into fluorapatite during milling and thermal treatment was investigated using FTIR spectroscopy and X-ray diffraction. The morphology and size distribution of the obtained powders was studied using SEM and TEM.",
journal = "International Journal of Applied Ceramic Technology",
title = "Mechanochemical and Low-Temperature Synthesis of Nanocrystalline Fluorohydroxyapatite/Fluorapatite",
volume = "10",
number = "6",
pages = "957-969",
doi = "10.1111/j.1744-7402.2012.02821.x"
}

Jokanović, V. R., Čolović, B. M., Jović, N. G., Babić-Stojić, B. S.,& Jokanović, B.. (2013). Mechanochemical and Low-Temperature Synthesis of Nanocrystalline Fluorohydroxyapatite/Fluorapatite. in International Journal of Applied Ceramic Technology, 10(6), 957-969.
https://doi.org/10.1111/j.1744-7402.2012.02821.x

Jokanović VR, Čolović BM, Jović NG, Babić-Stojić BS, Jokanović B. Mechanochemical and Low-Temperature Synthesis of Nanocrystalline Fluorohydroxyapatite/Fluorapatite. in International Journal of Applied Ceramic Technology. 2013;10(6):957-969.
doi:10.1111/j.1744-7402.2012.02821.x .

Jokanović, Vukoman R., Čolović, Božana M., Jović, Nataša G., Babić-Stojić, Branka S., Jokanović, Bojan, "Mechanochemical and Low-Temperature Synthesis of Nanocrystalline Fluorohydroxyapatite/Fluorapatite" in International Journal of Applied Ceramic Technology, 10, no. 6 (2013):957-969,
https://doi.org/10.1111/j.1744-7402.2012.02821.x . .

TY  - CONF
AU  - Jokanović, Vukoman
AU  - Dramićanin, Miroslav
AU  - Andrić, Željka
AU  - Jokanović, Bojan
PY  - 2005
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12748
AB  - Theoretical model describing the mechanism of droplet formation and structure of GdSiO5:Eu3+ spheres prepared by the process of ultrasonic spray pyrolysis, using colloidal solution consisting of the 7.5 nm SiO2 nano-particles and gadolinium and europium nitrate as a precursor, is developed. The proposed model quantitatively defines each line in the size distribution spectrum. Agreement between theoretically obtained basic structural parameters (size distribution and geometry) and experimentally determined values was found. Luminescence and phosphorescence properties in such structured powders and thin films are investigated. It is shown that very intense emission spectra can be obtained for mixture of 1M silica and stoichiometric quantity of gadolinium for obtaining GdSiO5 doped with 1 at.% Eu. Very clear, magnetic -dipole transition 5D0 - 7F1 at 590 nm, electrical hypersensitive transition 5D0 - 7F2 at 620 nm, red shifted in our case to 613 nm, as a transitions 5D0 - 7F3 and 5D0 - 7F 4 at 653 nm and 707 nm, respectively, are appeared.
C3  - AIChE Annual Meeting : Proceedings
T1  - Nanodesigning of Gdsio5: Eu3+particles obtained by spray pyrolysis method and their luminescence properties
SP  - 66925
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12748
ER  - 

@conference{
author = "Jokanović, Vukoman and Dramićanin, Miroslav and Andrić, Željka and Jokanović, Bojan",
year = "2005",
abstract = "Theoretical model describing the mechanism of droplet formation and structure of GdSiO5:Eu3+ spheres prepared by the process of ultrasonic spray pyrolysis, using colloidal solution consisting of the 7.5 nm SiO2 nano-particles and gadolinium and europium nitrate as a precursor, is developed. The proposed model quantitatively defines each line in the size distribution spectrum. Agreement between theoretically obtained basic structural parameters (size distribution and geometry) and experimentally determined values was found. Luminescence and phosphorescence properties in such structured powders and thin films are investigated. It is shown that very intense emission spectra can be obtained for mixture of 1M silica and stoichiometric quantity of gadolinium for obtaining GdSiO5 doped with 1 at.% Eu. Very clear, magnetic -dipole transition 5D0 - 7F1 at 590 nm, electrical hypersensitive transition 5D0 - 7F2 at 620 nm, red shifted in our case to 613 nm, as a transitions 5D0 - 7F3 and 5D0 - 7F 4 at 653 nm and 707 nm, respectively, are appeared.",
journal = "AIChE Annual Meeting : Proceedings",
title = "Nanodesigning of Gdsio5: Eu3+particles obtained by spray pyrolysis method and their luminescence properties",
pages = "66925",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12748"
}

Jokanović, V., Dramićanin, M., Andrić, Ž.,& Jokanović, B.. (2005). Nanodesigning of Gdsio5: Eu3+particles obtained by spray pyrolysis method and their luminescence properties. in AIChE Annual Meeting : Proceedings, 66925.
https://hdl.handle.net/21.15107/rcub_vinar_12748

Jokanović V, Dramićanin M, Andrić Ž, Jokanović B. Nanodesigning of Gdsio5: Eu3+particles obtained by spray pyrolysis method and their luminescence properties. in AIChE Annual Meeting : Proceedings. 2005;:66925.
https://hdl.handle.net/21.15107/rcub_vinar_12748 .

Jokanović, Vukoman, Dramićanin, Miroslav, Andrić, Željka, Jokanović, Bojan, "Nanodesigning of Gdsio5: Eu3+particles obtained by spray pyrolysis method and their luminescence properties" in AIChE Annual Meeting : Proceedings (2005):66925,
https://hdl.handle.net/21.15107/rcub_vinar_12748 .