TY  - JOUR
AU  - Nikolić, Aleksandar S.
AU  - Osmokrovic, P.
AU  - Manojlović, Dragan D.
AU  - Šojić, Nešo
AU  - Pavlović, Miodrag B.
PY  - 2008
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/949
AB  - Nickel ferrites are among the most abundant members of the soft magnetic materials. In the last few decades, the interest for new methods of their preparation has increased, due to the fact that physical and chemical properties of these materials depend strongly on preparation conditions. In this paper, samples of NiFe2O4 were synthesized by standard sintering and via a chemical procedure from complex compounds with acetylacetonato ligands. Formation of the NiFe2O4 spinel phase was monitored by SEM, TEM, and XRID measurements. Average particle size was 20x20x4 nm (slabs). Masurements of the real and imaginary parts of permittivity and permeability were conducted on the obtained nickel ferrite samples in the 7-12 GHz frequency range. In addition to this, the electromegnetic radiation (EMR) absorption coefficient was calculated for all samples, using the Nicolson-Ross analysis. Examination of the obtained results lead to the conclusion that the method of synthesis, as well as final particle size, influence the EMR absorption coefficient in the observed frequency range.
PB  - Natl Inst Optoelectronics, Bucharest-Magurele
T2  - Journal of Optoelectronics and Advanced Materials
T1  - Dependence of nickel ferrite EMR absorption coefficient on the method of preparation
VL  - 10
IS  - 6
SP  - 1390
EP  - 1395
UR  - https://hdl.handle.net/21.15107/rcub_cherry_949
ER  - 

@article{
author = "Nikolić, Aleksandar S. and Osmokrovic, P. and Manojlović, Dragan D. and Šojić, Nešo and Pavlović, Miodrag B.",
year = "2008",
abstract = "Nickel ferrites are among the most abundant members of the soft magnetic materials. In the last few decades, the interest for new methods of their preparation has increased, due to the fact that physical and chemical properties of these materials depend strongly on preparation conditions. In this paper, samples of NiFe2O4 were synthesized by standard sintering and via a chemical procedure from complex compounds with acetylacetonato ligands. Formation of the NiFe2O4 spinel phase was monitored by SEM, TEM, and XRID measurements. Average particle size was 20x20x4 nm (slabs). Masurements of the real and imaginary parts of permittivity and permeability were conducted on the obtained nickel ferrite samples in the 7-12 GHz frequency range. In addition to this, the electromegnetic radiation (EMR) absorption coefficient was calculated for all samples, using the Nicolson-Ross analysis. Examination of the obtained results lead to the conclusion that the method of synthesis, as well as final particle size, influence the EMR absorption coefficient in the observed frequency range.",
publisher = "Natl Inst Optoelectronics, Bucharest-Magurele",
journal = "Journal of Optoelectronics and Advanced Materials",
title = "Dependence of nickel ferrite EMR absorption coefficient on the method of preparation",
volume = "10",
number = "6",
pages = "1390-1395",
url = "https://hdl.handle.net/21.15107/rcub_cherry_949"
}

Nikolić, A. S., Osmokrovic, P., Manojlović, D. D., Šojić, N.,& Pavlović, M. B.. (2008). Dependence of nickel ferrite EMR absorption coefficient on the method of preparation. in Journal of Optoelectronics and Advanced Materials
Natl Inst Optoelectronics, Bucharest-Magurele., 10(6), 1390-1395.
https://hdl.handle.net/21.15107/rcub_cherry_949

Nikolić AS, Osmokrovic P, Manojlović DD, Šojić N, Pavlović MB. Dependence of nickel ferrite EMR absorption coefficient on the method of preparation. in Journal of Optoelectronics and Advanced Materials. 2008;10(6):1390-1395.
https://hdl.handle.net/21.15107/rcub_cherry_949 .

Nikolić, Aleksandar S., Osmokrovic, P., Manojlović, Dragan D., Šojić, Nešo, Pavlović, Miodrag B., "Dependence of nickel ferrite EMR absorption coefficient on the method of preparation" in Journal of Optoelectronics and Advanced Materials, 10, no. 6 (2008):1390-1395,
https://hdl.handle.net/21.15107/rcub_cherry_949 .

TY  - JOUR
AU  - Nikolić, Aleksandar S.
AU  - Puzovic, J. M.
AU  - Pavlović, Miodrag B.
AU  - Osmokrovic, P.
AU  - Lazarevic, Z.
PY  - 2007
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/881
AB  - Ultrafine nickel-ferrite materials were prepared from complex compounds with acetylacetonato-ligands, according to a previously developed method. The influence of different atmospheres (air, oxygen and nitrogen) applied during thermal decomposition of precursors was studied. Thermal decomposition was carried out with the heating rate of 10 degrees C/min and the cooling rate of 20 degrees C/min. Characterization of the final products was performed by X-ray and TEM analysis. Reviewing the products, we concluded that the optimal temperatures for the preparation of pure ultrafine ferrite materials were 400 degrees C for air atmosphere, and 500 degrees C for O-2 and N-2 atmospheres. All samples prepared at lower temperatures show the presence of the nickel-phase, while all samples prepared at higher temperatures show the presence of the hematite-phase.
PB  - Natl Inst Optoelectronics, Bucharest-Magurele
T2  - Journal of Optoelectronics and Advanced Materials
T1  - Preparation of nickel-ferrites from complex compounds with acetylacetonato-ligands in different atmosphere conditions
VL  - 9
IS  - 9
SP  - 2731
EP  - 2733
UR  - https://hdl.handle.net/21.15107/rcub_cherry_881
ER  - 

@article{
author = "Nikolić, Aleksandar S. and Puzovic, J. M. and Pavlović, Miodrag B. and Osmokrovic, P. and Lazarevic, Z.",
year = "2007",
abstract = "Ultrafine nickel-ferrite materials were prepared from complex compounds with acetylacetonato-ligands, according to a previously developed method. The influence of different atmospheres (air, oxygen and nitrogen) applied during thermal decomposition of precursors was studied. Thermal decomposition was carried out with the heating rate of 10 degrees C/min and the cooling rate of 20 degrees C/min. Characterization of the final products was performed by X-ray and TEM analysis. Reviewing the products, we concluded that the optimal temperatures for the preparation of pure ultrafine ferrite materials were 400 degrees C for air atmosphere, and 500 degrees C for O-2 and N-2 atmospheres. All samples prepared at lower temperatures show the presence of the nickel-phase, while all samples prepared at higher temperatures show the presence of the hematite-phase.",
publisher = "Natl Inst Optoelectronics, Bucharest-Magurele",
journal = "Journal of Optoelectronics and Advanced Materials",
title = "Preparation of nickel-ferrites from complex compounds with acetylacetonato-ligands in different atmosphere conditions",
volume = "9",
number = "9",
pages = "2731-2733",
url = "https://hdl.handle.net/21.15107/rcub_cherry_881"
}

Nikolić, A. S., Puzovic, J. M., Pavlović, M. B., Osmokrovic, P.,& Lazarevic, Z.. (2007). Preparation of nickel-ferrites from complex compounds with acetylacetonato-ligands in different atmosphere conditions. in Journal of Optoelectronics and Advanced Materials
Natl Inst Optoelectronics, Bucharest-Magurele., 9(9), 2731-2733.
https://hdl.handle.net/21.15107/rcub_cherry_881

Nikolić AS, Puzovic JM, Pavlović MB, Osmokrovic P, Lazarevic Z. Preparation of nickel-ferrites from complex compounds with acetylacetonato-ligands in different atmosphere conditions. in Journal of Optoelectronics and Advanced Materials. 2007;9(9):2731-2733.
https://hdl.handle.net/21.15107/rcub_cherry_881 .

Nikolić, Aleksandar S., Puzovic, J. M., Pavlović, Miodrag B., Osmokrovic, P., Lazarevic, Z., "Preparation of nickel-ferrites from complex compounds with acetylacetonato-ligands in different atmosphere conditions" in Journal of Optoelectronics and Advanced Materials, 9, no. 9 (2007):2731-2733,
https://hdl.handle.net/21.15107/rcub_cherry_881 .

TY  - JOUR
AU  - Osmokrovic, P
AU  - Jovalekic, C
AU  - Manojlović, Dragan D.
AU  - Pavlović, Miodrag B.
PY  - 2006
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/758
AB  - The influence of long-term milling of a mixture of MnCO3 and alpha-Fe2O3, and of MnO2 and alpha-Fe2O3 powders in a planetary ball mill on the reaction synthesis of nanosized MnFe2O4 ferrites was studied. The mechano-chemical reaction leading to formation of the MnFe2O4 spinel phase was followed by X-ray diffraction. The spinel phase was first observed after 10 h of milling and its formation was completed after 20 h in case of the MnCO3 - alpha-Fe2O3 mixture. The synthesized MnFe2O4 ferrite has a nanocrystalline structure with a crystallite size of about 28 nm. The thermal treatment of the as-milled powder at 400 degrees C for 4 h led to formation of the MnFe2O4 crystalline phase in case of the mixture of MnCO3 and alpha-Fe2O3, but in MnO2 alpha-Fe2O3 case thermal treatment at temperatures of 400 degrees C and higher leads to formation of (Mn,Fe)203 and separation of Mn2O3 and Fe2O3.
PB  - Natl Inst Optoelectronics, Bucharest-Magurele
T2  - Journal of Optoelectronics and Advanced Materials
T1  - Synthesis of MnFe2O4 nanoparticles by mechanochemical reaction
VL  - 8
IS  - 1
SP  - 312
EP  - 314
UR  - https://hdl.handle.net/21.15107/rcub_cherry_758
ER  - 

@article{
author = "Osmokrovic, P and Jovalekic, C and Manojlović, Dragan D. and Pavlović, Miodrag B.",
year = "2006",
abstract = "The influence of long-term milling of a mixture of MnCO3 and alpha-Fe2O3, and of MnO2 and alpha-Fe2O3 powders in a planetary ball mill on the reaction synthesis of nanosized MnFe2O4 ferrites was studied. The mechano-chemical reaction leading to formation of the MnFe2O4 spinel phase was followed by X-ray diffraction. The spinel phase was first observed after 10 h of milling and its formation was completed after 20 h in case of the MnCO3 - alpha-Fe2O3 mixture. The synthesized MnFe2O4 ferrite has a nanocrystalline structure with a crystallite size of about 28 nm. The thermal treatment of the as-milled powder at 400 degrees C for 4 h led to formation of the MnFe2O4 crystalline phase in case of the mixture of MnCO3 and alpha-Fe2O3, but in MnO2 alpha-Fe2O3 case thermal treatment at temperatures of 400 degrees C and higher leads to formation of (Mn,Fe)203 and separation of Mn2O3 and Fe2O3.",
publisher = "Natl Inst Optoelectronics, Bucharest-Magurele",
journal = "Journal of Optoelectronics and Advanced Materials",
title = "Synthesis of MnFe2O4 nanoparticles by mechanochemical reaction",
volume = "8",
number = "1",
pages = "312-314",
url = "https://hdl.handle.net/21.15107/rcub_cherry_758"
}

Osmokrovic, P., Jovalekic, C., Manojlović, D. D.,& Pavlović, M. B.. (2006). Synthesis of MnFe2O4 nanoparticles by mechanochemical reaction. in Journal of Optoelectronics and Advanced Materials
Natl Inst Optoelectronics, Bucharest-Magurele., 8(1), 312-314.
https://hdl.handle.net/21.15107/rcub_cherry_758

Osmokrovic P, Jovalekic C, Manojlović DD, Pavlović MB. Synthesis of MnFe2O4 nanoparticles by mechanochemical reaction. in Journal of Optoelectronics and Advanced Materials. 2006;8(1):312-314.
https://hdl.handle.net/21.15107/rcub_cherry_758 .

Osmokrovic, P, Jovalekic, C, Manojlović, Dragan D., Pavlović, Miodrag B., "Synthesis of MnFe2O4 nanoparticles by mechanochemical reaction" in Journal of Optoelectronics and Advanced Materials, 8, no. 1 (2006):312-314,
https://hdl.handle.net/21.15107/rcub_cherry_758 .