TY  - JOUR
AU  - Obradović, N.
AU  - Gigov, M.
AU  - Djordjević, A.
AU  - Kern, F.
AU  - Dmitrović, S.
AU  - Matović, B.
AU  - Djordjević, A.
AU  - Tshantshapanyan, A.
AU  - Vlahović, Branislav
AU  - Petrović, P.
AU  - Pavlović, Vladimir
PY  - 2019
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/5126
AB  - The paper presents results of the influence of mechanical activation of shungite, a carbon-mineral rock material rich in silica and carbon, on its sintering behaviour, and obtaining of pure SiC ceramics. The mechanical activation of the starting powder was performed in a high-energy ball mill in time intervals from 30 to 480 min. The phase composition of the starting powders and sintered samples was analysed by the X-ray diffraction method. The first traces of SiC were detected after sintering at 1350 °C for 2 h in an Ar atmosphere, along with traces of unreacted SiO2. The scanning electron microscopy was performed in order to determine changes in the microstructure. Sintering was performed at various temperatures for 2 h, in an Ar atmosphere and a vacuum. Dielectric properties of the sintered samples were measured in the frequency range from 1 to 500 MHz. The obtained results indicate that the sintered powder is a good candidate for applications as an absorber of electromagnetic waves in microwave engineering.
PB  - Univerzitet u Novom Sadu - Tehnološki fakultet, Novi Sad
T2  - Processing and Application of Ceramics
T1  - Shungite – a carbon-mineral rock material: Its sinterability and possible applications
EP  - 97
IS  - 1
SP  - 89
VL  - 13
DO  - 10.2298/PAC1901089O
ER  - 

@article{
author = "Obradović, N. and Gigov, M. and Djordjević, A. and Kern, F. and Dmitrović, S. and Matović, B. and Djordjević, A. and Tshantshapanyan, A. and Vlahović, Branislav and Petrović, P. and Pavlović, Vladimir",
year = "2019",
abstract = "The paper presents results of the influence of mechanical activation of shungite, a carbon-mineral rock material rich in silica and carbon, on its sintering behaviour, and obtaining of pure SiC ceramics. The mechanical activation of the starting powder was performed in a high-energy ball mill in time intervals from 30 to 480 min. The phase composition of the starting powders and sintered samples was analysed by the X-ray diffraction method. The first traces of SiC were detected after sintering at 1350 °C for 2 h in an Ar atmosphere, along with traces of unreacted SiO2. The scanning electron microscopy was performed in order to determine changes in the microstructure. Sintering was performed at various temperatures for 2 h, in an Ar atmosphere and a vacuum. Dielectric properties of the sintered samples were measured in the frequency range from 1 to 500 MHz. The obtained results indicate that the sintered powder is a good candidate for applications as an absorber of electromagnetic waves in microwave engineering.",
publisher = "Univerzitet u Novom Sadu - Tehnološki fakultet, Novi Sad",
journal = "Processing and Application of Ceramics",
title = "Shungite – a carbon-mineral rock material: Its sinterability and possible applications",
pages = "97-89",
number = "1",
volume = "13",
doi = "10.2298/PAC1901089O"
}

Obradović, N., Gigov, M., Djordjević, A., Kern, F., Dmitrović, S., Matović, B., Djordjević, A., Tshantshapanyan, A., Vlahović, B., Petrović, P.,& Pavlović, V.. (2019). Shungite – a carbon-mineral rock material: Its sinterability and possible applications. in Processing and Application of Ceramics
Univerzitet u Novom Sadu - Tehnološki fakultet, Novi Sad., 13(1), 89-97.
https://doi.org/10.2298/PAC1901089O

Obradović N, Gigov M, Djordjević A, Kern F, Dmitrović S, Matović B, Djordjević A, Tshantshapanyan A, Vlahović B, Petrović P, Pavlović V. Shungite – a carbon-mineral rock material: Its sinterability and possible applications. in Processing and Application of Ceramics. 2019;13(1):89-97.
doi:10.2298/PAC1901089O .

Obradović, N., Gigov, M., Djordjević, A., Kern, F., Dmitrović, S., Matović, B., Djordjević, A., Tshantshapanyan, A., Vlahović, Branislav, Petrović, P., Pavlović, Vladimir, "Shungite – a carbon-mineral rock material: Its sinterability and possible applications" in Processing and Application of Ceramics, 13, no. 1 (2019):89-97,
https://doi.org/10.2298/PAC1901089O . .

TY  - JOUR
AU  - Filipović, Suzana
AU  - Obradović, N.
AU  - Kosanović, Darko
AU  - Pavlović, Vladimir
AU  - Djordjević, A.
PY  - 2013
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/3175
AB  - Mixtures of MgO-TiO2 powders were mechanically activated in a planetary ball mill for a time interval from 0 to 120 minutes. The influence of the mechanical activation on the phase composition and crystal structure have been analyzed by X-ray diffraction (XRD), while the effect of the activation and sintering process on the microstructure was investigated by scanning electron microscopy (SEM). Using the data obtained from XRD microstructural parameters, the volume averaged crystallite size (D), the density of dislocations (rho D) and the lattice strain (e(hkl)) values were calculated. Dielectric measurements were performed in order to show the variations in the dielectric constant as a function of the time of mechanical activation.
T2  - Journal of Ceramic Processing Research
T1  - Sintering of the mechanically activated MgO-TiO2 system
EP  - 34
IS  - 1
SP  - 31
VL  - 14
UR  - https://hdl.handle.net/21.15107/rcub_dais_349
ER  - 

@article{
author = "Filipović, Suzana and Obradović, N. and Kosanović, Darko and Pavlović, Vladimir and Djordjević, A.",
year = "2013",
abstract = "Mixtures of MgO-TiO2 powders were mechanically activated in a planetary ball mill for a time interval from 0 to 120 minutes. The influence of the mechanical activation on the phase composition and crystal structure have been analyzed by X-ray diffraction (XRD), while the effect of the activation and sintering process on the microstructure was investigated by scanning electron microscopy (SEM). Using the data obtained from XRD microstructural parameters, the volume averaged crystallite size (D), the density of dislocations (rho D) and the lattice strain (e(hkl)) values were calculated. Dielectric measurements were performed in order to show the variations in the dielectric constant as a function of the time of mechanical activation.",
journal = "Journal of Ceramic Processing Research",
title = "Sintering of the mechanically activated MgO-TiO2 system",
pages = "34-31",
number = "1",
volume = "14",
url = "https://hdl.handle.net/21.15107/rcub_dais_349"
}

Filipović, S., Obradović, N., Kosanović, D., Pavlović, V.,& Djordjević, A.. (2013). Sintering of the mechanically activated MgO-TiO2 system. in Journal of Ceramic Processing Research, 14(1), 31-34.
https://hdl.handle.net/21.15107/rcub_dais_349

Filipović S, Obradović N, Kosanović D, Pavlović V, Djordjević A. Sintering of the mechanically activated MgO-TiO2 system. in Journal of Ceramic Processing Research. 2013;14(1):31-34.
https://hdl.handle.net/21.15107/rcub_dais_349 .

Filipović, Suzana, Obradović, N., Kosanović, Darko, Pavlović, Vladimir, Djordjević, A., "Sintering of the mechanically activated MgO-TiO2 system" in Journal of Ceramic Processing Research, 14, no. 1 (2013):31-34,
https://hdl.handle.net/21.15107/rcub_dais_349 .

TY  - JOUR
AU  - Tomić, Zorica
AU  - Djordjević, A.R.
AU  - Rajković, Miloš
AU  - Vukašinović, Ivana
AU  - Nikolić, N.S.
AU  - Pavlović, Vladimir
AU  - Lačnjevac, Časlav
PY  - 2011
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/2420
AB  - Primordial radionuclides present in the rocks and minerals of the earth's crust are naturally occurring source of radiation that has important impact on human health. Therefore, it is essential to evaluate origin, mobility and transfer of natural radionuclides in ecosystem. Our paper represents the results of influence of mineral composition, sand-, silt-, and clay-size mechanical fraction and heavy mineral fraction on distribution and mobility of natural radionuclides 238U, 232Th, 226Ra and 40K in profiles of soil type rigosol, from the area of school estate good "Radmilovac" of Faculty of Agriculture, Zemun, University of Belgrade. Methods used were X-ray powder diffraction, heavy liquid mineral separation, HCBr3, scanning electron microscopy (SEM) and gamma-ray spectrometry. Analysis of the results showed correlation of natural radionuclides with heavy mineral fraction (Fe oxides and hydroxides, epidote, ilmeniterutile, staurolite and zircon, garnet, amphibole) and secondary minerals (Ca montmorillonite, mix layer silicates (MSS), illite, kaolinite and vermiculite).
T2  - Sensors and Transducers
T1  - Impact of mineral composition on the distribution of natural radionuclides in rigosol-anthrosol
EP  - 130
IS  - 2
SP  - 115
VL  - 125
UR  - https://hdl.handle.net/21.15107/rcub_agrospace_2420
ER  - 

@article{
author = "Tomić, Zorica and Djordjević, A.R. and Rajković, Miloš and Vukašinović, Ivana and Nikolić, N.S. and Pavlović, Vladimir and Lačnjevac, Časlav",
year = "2011",
abstract = "Primordial radionuclides present in the rocks and minerals of the earth's crust are naturally occurring source of radiation that has important impact on human health. Therefore, it is essential to evaluate origin, mobility and transfer of natural radionuclides in ecosystem. Our paper represents the results of influence of mineral composition, sand-, silt-, and clay-size mechanical fraction and heavy mineral fraction on distribution and mobility of natural radionuclides 238U, 232Th, 226Ra and 40K in profiles of soil type rigosol, from the area of school estate good "Radmilovac" of Faculty of Agriculture, Zemun, University of Belgrade. Methods used were X-ray powder diffraction, heavy liquid mineral separation, HCBr3, scanning electron microscopy (SEM) and gamma-ray spectrometry. Analysis of the results showed correlation of natural radionuclides with heavy mineral fraction (Fe oxides and hydroxides, epidote, ilmeniterutile, staurolite and zircon, garnet, amphibole) and secondary minerals (Ca montmorillonite, mix layer silicates (MSS), illite, kaolinite and vermiculite).",
journal = "Sensors and Transducers",
title = "Impact of mineral composition on the distribution of natural radionuclides in rigosol-anthrosol",
pages = "130-115",
number = "2",
volume = "125",
url = "https://hdl.handle.net/21.15107/rcub_agrospace_2420"
}

Tomić, Z., Djordjević, A.R., Rajković, M., Vukašinović, I., Nikolić, N.S., Pavlović, V.,& Lačnjevac, Č.. (2011). Impact of mineral composition on the distribution of natural radionuclides in rigosol-anthrosol. in Sensors and Transducers, 125(2), 115-130.
https://hdl.handle.net/21.15107/rcub_agrospace_2420

Tomić Z, Djordjević A, Rajković M, Vukašinović I, Nikolić N, Pavlović V, Lačnjevac Č. Impact of mineral composition on the distribution of natural radionuclides in rigosol-anthrosol. in Sensors and Transducers. 2011;125(2):115-130.
https://hdl.handle.net/21.15107/rcub_agrospace_2420 .

Tomić, Zorica, Djordjević, A.R., Rajković, Miloš, Vukašinović, Ivana, Nikolić, N.S., Pavlović, Vladimir, Lačnjevac, Časlav, "Impact of mineral composition on the distribution of natural radionuclides in rigosol-anthrosol" in Sensors and Transducers, 125, no. 2 (2011):115-130,
https://hdl.handle.net/21.15107/rcub_agrospace_2420 .