TY  - JOUR
AU  - Nikolić, Maria Vesna
AU  - Sekulic, Dalibor L
AU  - Nikolić, Nenad
AU  - Slankamenac, Milos P
AU  - Aleksić, Obrad
AU  - Danninger, H
AU  - Halwax, E
AU  - Pavlović, Vladimir B
AU  - Nikolić, Pantelija M.
PY  - 2013
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/657
AB  - In this work we have analyzed the effects of Ti doping on structural and electrical properties of alpha-Fe2O3. When the amount of added Ti (5 wt.% TiO2) was within the solubility degree and XRD, SEM and EDS analysis revealed a homogenous hematite structure, with lattice parameters a= 5.03719(3), c= 13.7484(1) slightly increased due to incorporation of Ti into the rhombohedral hematite lattice. Higher amounts of Ti (10 wt.% TiO2) resulted in the formation of pseudobrookite, besides hematite, confirmed by SEM and EDS analysis. Studies of electric properties in the temperature range 25-225oC at different frequencies (100-1Mz) showed that Ti doping improved electrical conductivity. Impedance analysis was performed using an equivalent circuit, showing one relaxation process and suggesting dominant grain boundary contribution.
PB  - Međunarodni Institut za nauku o sinterovanju, Beograd
T2  - Science of Sintering
T1  - Structural and Electrical Properties of Ti Doped alpha-Fe2O3
EP  - 292
IS  - 3
SP  - 281
VL  - 45
DO  - 10.2298/SOS1303281N
ER  - 

@article{
author = "Nikolić, Maria Vesna and Sekulic, Dalibor L and Nikolić, Nenad and Slankamenac, Milos P and Aleksić, Obrad and Danninger, H and Halwax, E and Pavlović, Vladimir B and Nikolić, Pantelija M.",
year = "2013",
abstract = "In this work we have analyzed the effects of Ti doping on structural and electrical properties of alpha-Fe2O3. When the amount of added Ti (5 wt.% TiO2) was within the solubility degree and XRD, SEM and EDS analysis revealed a homogenous hematite structure, with lattice parameters a= 5.03719(3), c= 13.7484(1) slightly increased due to incorporation of Ti into the rhombohedral hematite lattice. Higher amounts of Ti (10 wt.% TiO2) resulted in the formation of pseudobrookite, besides hematite, confirmed by SEM and EDS analysis. Studies of electric properties in the temperature range 25-225oC at different frequencies (100-1Mz) showed that Ti doping improved electrical conductivity. Impedance analysis was performed using an equivalent circuit, showing one relaxation process and suggesting dominant grain boundary contribution.",
publisher = "Međunarodni Institut za nauku o sinterovanju, Beograd",
journal = "Science of Sintering",
title = "Structural and Electrical Properties of Ti Doped alpha-Fe2O3",
pages = "292-281",
number = "3",
volume = "45",
doi = "10.2298/SOS1303281N"
}

Nikolić, M. V., Sekulic, D. L., Nikolić, N., Slankamenac, M. P., Aleksić, O., Danninger, H., Halwax, E., Pavlović, V. B.,& Nikolić, P. M.. (2013). Structural and Electrical Properties of Ti Doped alpha-Fe2O3. in Science of Sintering
Međunarodni Institut za nauku o sinterovanju, Beograd., 45(3), 281-292.
https://doi.org/10.2298/SOS1303281N

Nikolić MV, Sekulic DL, Nikolić N, Slankamenac MP, Aleksić O, Danninger H, Halwax E, Pavlović VB, Nikolić PM. Structural and Electrical Properties of Ti Doped alpha-Fe2O3. in Science of Sintering. 2013;45(3):281-292.
doi:10.2298/SOS1303281N .

Nikolić, Maria Vesna, Sekulic, Dalibor L, Nikolić, Nenad, Slankamenac, Milos P, Aleksić, Obrad, Danninger, H, Halwax, E, Pavlović, Vladimir B, Nikolić, Pantelija M., "Structural and Electrical Properties of Ti Doped alpha-Fe2O3" in Science of Sintering, 45, no. 3 (2013):281-292,
https://doi.org/10.2298/SOS1303281N . .

TY  - JOUR
AU  - Zlatkov, B.S.
AU  - Mitrović, Nebojša S.
AU  - Nikolić, Maria Vesna
AU  - Maricic, Aleksa M
AU  - Danninger, H
AU  - Aleksić, Obrad
AU  - Halwax, E
PY  - 2010
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/375
AB  - In this work, manganese zinc ferrite components were manufactured by powder injection molding-PIM technology. A fine powder consisting of Mn1-xZnxFe2O4 with small addition of hematite alpha-Fe2O3 as used in mass ferrite production was mixed with an organic binder (Solvent System) to form ferrite feedstock for powder injection molding-PIM technology. Excess of Fe2O3 was present in the starting powder in order to suppress conversion of Fe3+ to Fe2+ ions which would lower the permeability. The ferrite feedstock was injected in a mold with a cavity shaped like a small cylinder with a hole on the main axis. Injection molded samples were then solvent and thermally debinded and sintered in different atmospheres: air, argon and nitrogen. The starting powder, injected green samples and sintered samples were characterized using X-ray diffractometry, scanning electron microscopy, thermogravimetry, differential thermal analysis as well as by magnetic measurements. Rietveld refinement of measured X-ray patterns was done to detect possible phase transformations of Fe2O3 to other iron oxides through reduction by binder residues (carbon) at elevated temperatures during thermal debinding and sintering. Finally, the magnetic properties were measured by hysteresis graph and mutually compared for the injected samples that were sintered in air, argon and nitrogen. The obtained magnetic characteristics where found to be comparable with commercial samples prepared by traditional sintering technology.
PB  - Elsevier Science Bv, Amsterdam
T2  - Materials Science and Engineering B-Solid State Materials for Advanced Technology
T1  - Properties of MnZn ferrites prepared by powder injection molding technology
EP  - 222
IS  - 3
SP  - 217
VL  - 175
DO  - 10.1016/j.mseb.2010.07.031
ER  - 

@article{
author = "Zlatkov, B.S. and Mitrović, Nebojša S. and Nikolić, Maria Vesna and Maricic, Aleksa M and Danninger, H and Aleksić, Obrad and Halwax, E",
year = "2010",
abstract = "In this work, manganese zinc ferrite components were manufactured by powder injection molding-PIM technology. A fine powder consisting of Mn1-xZnxFe2O4 with small addition of hematite alpha-Fe2O3 as used in mass ferrite production was mixed with an organic binder (Solvent System) to form ferrite feedstock for powder injection molding-PIM technology. Excess of Fe2O3 was present in the starting powder in order to suppress conversion of Fe3+ to Fe2+ ions which would lower the permeability. The ferrite feedstock was injected in a mold with a cavity shaped like a small cylinder with a hole on the main axis. Injection molded samples were then solvent and thermally debinded and sintered in different atmospheres: air, argon and nitrogen. The starting powder, injected green samples and sintered samples were characterized using X-ray diffractometry, scanning electron microscopy, thermogravimetry, differential thermal analysis as well as by magnetic measurements. Rietveld refinement of measured X-ray patterns was done to detect possible phase transformations of Fe2O3 to other iron oxides through reduction by binder residues (carbon) at elevated temperatures during thermal debinding and sintering. Finally, the magnetic properties were measured by hysteresis graph and mutually compared for the injected samples that were sintered in air, argon and nitrogen. The obtained magnetic characteristics where found to be comparable with commercial samples prepared by traditional sintering technology.",
publisher = "Elsevier Science Bv, Amsterdam",
journal = "Materials Science and Engineering B-Solid State Materials for Advanced Technology",
title = "Properties of MnZn ferrites prepared by powder injection molding technology",
pages = "222-217",
number = "3",
volume = "175",
doi = "10.1016/j.mseb.2010.07.031"
}

Zlatkov, B.S., Mitrović, N. S., Nikolić, M. V., Maricic, A. M., Danninger, H., Aleksić, O.,& Halwax, E.. (2010). Properties of MnZn ferrites prepared by powder injection molding technology. in Materials Science and Engineering B-Solid State Materials for Advanced Technology
Elsevier Science Bv, Amsterdam., 175(3), 217-222.
https://doi.org/10.1016/j.mseb.2010.07.031

Zlatkov B, Mitrović NS, Nikolić MV, Maricic AM, Danninger H, Aleksić O, Halwax E. Properties of MnZn ferrites prepared by powder injection molding technology. in Materials Science and Engineering B-Solid State Materials for Advanced Technology. 2010;175(3):217-222.
doi:10.1016/j.mseb.2010.07.031 .

Zlatkov, B.S., Mitrović, Nebojša S., Nikolić, Maria Vesna, Maricic, Aleksa M, Danninger, H, Aleksić, Obrad, Halwax, E, "Properties of MnZn ferrites prepared by powder injection molding technology" in Materials Science and Engineering B-Solid State Materials for Advanced Technology, 175, no. 3 (2010):217-222,
https://doi.org/10.1016/j.mseb.2010.07.031 . .

TY  - CONF
AU  - Zlatkov, B.S.
AU  - ter, Maat, J.
AU  - Nikolić, Maria Vesna
AU  - Bavdek, U.
AU  - Gierl, C.
AU  - Danninger, H.
AU  - Aleksić, Obrad
PY  - 2010
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/396
AB  - Samples of Alnico8 were prepared from the same starting powder by pressing, casting and powder injection moulding (PIM), respectively, and characterized by SEM and thermal analysis-DTA/TGA. Optimization of the sintering process was done for reaching the optimum of the energy product (BH)max for each type of samples. During sintering of the PIM specimens, special attention was paid to lowering the contents of residual C and O in the Alnico alloys since these interstitials affect the main magnetic properties. PIM samples were prepared using a feedstock composed of Alnico powder and a Catamold® (BASF) binder. For analysis of the thermal debinding of PIM samples, sintering was done in a dilatometer with coupled mass spectrometer. Shape anisotropy was induced by thermo magnetic treatment of all samples. Subsequently the main magnetic properties were measured and compared mutually and with the best literature results. It was clearly shown from the results obtained that PIM samples can attain the properties of Alnico samples made by classical routes. The microstructure of the sintered PIM samples was analyzed by SEM.
PB  - European Powder Metallurgy Association (EPMA)
C3  - Proceedings of the World Powder Metallurgy Congress and Exhibition, World PM 2010
T1  - Parallel analysis of axial pressing, casting and PIM as routes for production of alnico8
VL  - 4
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_396
ER  - 

@conference{
author = "Zlatkov, B.S. and ter, Maat, J. and Nikolić, Maria Vesna and Bavdek, U. and Gierl, C. and Danninger, H. and Aleksić, Obrad",
year = "2010",
abstract = "Samples of Alnico8 were prepared from the same starting powder by pressing, casting and powder injection moulding (PIM), respectively, and characterized by SEM and thermal analysis-DTA/TGA. Optimization of the sintering process was done for reaching the optimum of the energy product (BH)max for each type of samples. During sintering of the PIM specimens, special attention was paid to lowering the contents of residual C and O in the Alnico alloys since these interstitials affect the main magnetic properties. PIM samples were prepared using a feedstock composed of Alnico powder and a Catamold® (BASF) binder. For analysis of the thermal debinding of PIM samples, sintering was done in a dilatometer with coupled mass spectrometer. Shape anisotropy was induced by thermo magnetic treatment of all samples. Subsequently the main magnetic properties were measured and compared mutually and with the best literature results. It was clearly shown from the results obtained that PIM samples can attain the properties of Alnico samples made by classical routes. The microstructure of the sintered PIM samples was analyzed by SEM.",
publisher = "European Powder Metallurgy Association (EPMA)",
journal = "Proceedings of the World Powder Metallurgy Congress and Exhibition, World PM 2010",
title = "Parallel analysis of axial pressing, casting and PIM as routes for production of alnico8",
volume = "4",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_396"
}

Zlatkov, B.S., ter, M. J., Nikolić, M. V., Bavdek, U., Gierl, C., Danninger, H.,& Aleksić, O.. (2010). Parallel analysis of axial pressing, casting and PIM as routes for production of alnico8. in Proceedings of the World Powder Metallurgy Congress and Exhibition, World PM 2010
European Powder Metallurgy Association (EPMA)., 4.
https://hdl.handle.net/21.15107/rcub_rimsi_396

Zlatkov B, ter MJ, Nikolić MV, Bavdek U, Gierl C, Danninger H, Aleksić O. Parallel analysis of axial pressing, casting and PIM as routes for production of alnico8. in Proceedings of the World Powder Metallurgy Congress and Exhibition, World PM 2010. 2010;4.
https://hdl.handle.net/21.15107/rcub_rimsi_396 .

Zlatkov, B.S., ter, Maat, J., Nikolić, Maria Vesna, Bavdek, U., Gierl, C., Danninger, H., Aleksić, Obrad, "Parallel analysis of axial pressing, casting and PIM as routes for production of alnico8" in Proceedings of the World Powder Metallurgy Congress and Exhibition, World PM 2010, 4 (2010),
https://hdl.handle.net/21.15107/rcub_rimsi_396 .

TY  - CONF
AU  - Zlatkov, B.S.
AU  - Nikolić, Maria Vesna
AU  - Danninger, H.
AU  - Aleksić, Obrad
AU  - Halwax, E.
AU  - Roth, W.
AU  - Lukić, Lazar S
PY  - 2010
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/395
AB  - Strontium hexaferrite permanent magnets were produced by powder injection molding (PIM). The feedstock for powder injection molding was prepared by mixing strontium hexaferrite powder with a "Solvent system" organic binder. Injection was performed in the cylindrical cavity of the mold both for isotropic and anisotropic green samples. Diametrical alignment was attained using high energy permanent magnets embedded in the mold (unidirectional magnetic field), while axial magnetic alignment was done by DC current passing through a solenoid placed around the cavity (electromagnetic field). Green samples (with and without magnetic alignment) were subjected to solvent debinding and subsequent thermal debinding followed by sintering. Sintering conditions were optimized in order to achieve maximum energy product. Magneto-crystalline aligning in strontium hexaferrite was studied on both green and sintered samples using X-ray diffraction, scanning electron microscopy (SEM) and magnetic measurements (hysteresisgraphs). All measurements were made in the direction parallel to the aligning magnetic field. The obtained results confirmed a high degree of magneto-crystalline alignment.
PB  - European Powder Metallurgy Association (EPMA)
C3  - Proceedings of the World Powder Metallurgy Congress and Exhibition, World PM 2010
T1  - Sintered strontium hexaferrite shaped by injection moulding in unidirectional magnetic and electromagnetic field
VL  - 4
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_395
ER  - 

@conference{
author = "Zlatkov, B.S. and Nikolić, Maria Vesna and Danninger, H. and Aleksić, Obrad and Halwax, E. and Roth, W. and Lukić, Lazar S",
year = "2010",
abstract = "Strontium hexaferrite permanent magnets were produced by powder injection molding (PIM). The feedstock for powder injection molding was prepared by mixing strontium hexaferrite powder with a "Solvent system" organic binder. Injection was performed in the cylindrical cavity of the mold both for isotropic and anisotropic green samples. Diametrical alignment was attained using high energy permanent magnets embedded in the mold (unidirectional magnetic field), while axial magnetic alignment was done by DC current passing through a solenoid placed around the cavity (electromagnetic field). Green samples (with and without magnetic alignment) were subjected to solvent debinding and subsequent thermal debinding followed by sintering. Sintering conditions were optimized in order to achieve maximum energy product. Magneto-crystalline aligning in strontium hexaferrite was studied on both green and sintered samples using X-ray diffraction, scanning electron microscopy (SEM) and magnetic measurements (hysteresisgraphs). All measurements were made in the direction parallel to the aligning magnetic field. The obtained results confirmed a high degree of magneto-crystalline alignment.",
publisher = "European Powder Metallurgy Association (EPMA)",
journal = "Proceedings of the World Powder Metallurgy Congress and Exhibition, World PM 2010",
title = "Sintered strontium hexaferrite shaped by injection moulding in unidirectional magnetic and electromagnetic field",
volume = "4",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_395"
}

Zlatkov, B.S., Nikolić, M. V., Danninger, H., Aleksić, O., Halwax, E., Roth, W.,& Lukić, L. S.. (2010). Sintered strontium hexaferrite shaped by injection moulding in unidirectional magnetic and electromagnetic field. in Proceedings of the World Powder Metallurgy Congress and Exhibition, World PM 2010
European Powder Metallurgy Association (EPMA)., 4.
https://hdl.handle.net/21.15107/rcub_rimsi_395

Zlatkov B, Nikolić MV, Danninger H, Aleksić O, Halwax E, Roth W, Lukić LS. Sintered strontium hexaferrite shaped by injection moulding in unidirectional magnetic and electromagnetic field. in Proceedings of the World Powder Metallurgy Congress and Exhibition, World PM 2010. 2010;4.
https://hdl.handle.net/21.15107/rcub_rimsi_395 .

Zlatkov, B.S., Nikolić, Maria Vesna, Danninger, H., Aleksić, Obrad, Halwax, E., Roth, W., Lukić, Lazar S, "Sintered strontium hexaferrite shaped by injection moulding in unidirectional magnetic and electromagnetic field" in Proceedings of the World Powder Metallurgy Congress and Exhibition, World PM 2010, 4 (2010),
https://hdl.handle.net/21.15107/rcub_rimsi_395 .

TY  - JOUR
AU  - Zlatkov, B.S.
AU  - Nikolić, Maria Vesna
AU  - Aleksić, Obrad
AU  - Danninger, H.
AU  - Halwax, E.
PY  - 2009
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/367
AB  - Barium hexaferrite permanent magnets were produced by powder injection molding. Starting barium hexaferrite powder was prepared from a Fe2O3 and BaCO3 powder mixture by calcination followed by milling. The feedstock for powder injection molding was prepared by mixing barium hexaferrite powder with a low viscosity binder. Magnetic alignment was achieved by applying a high intensity magnetic field to the melted feedstock during the injection process. Green samples (with and without magnetic alignment) were subjected to solvent debinding and subsequent thermal debinding followed by sintering. Sintering conditions were optimized in order to achieve a maximum energy product value. Magneto-crystalline aligning in barium hexaferrite was studied on both green and sintered samples using X-ray diffraction, scanning electron microscope (SEM) and magnetic measurements (hysteresis-graphs). All measurements were made both in a parallel and perpendicular direction to the aligning magnetic field. The obtained results confirmed magneto-crystalline alignment.
PB  - Elsevier Science Bv, Amsterdam
T2  - Journal of Magnetism and Magnetic Materials
T1  - A study of magneto-crystalline alignment in sintered barium hexaferrite fabricated by powder injection molding
EP  - 335
IS  - 4
SP  - 330
VL  - 321
DO  - 10.1016/j.jmmm.2008.09.014
ER  - 

@article{
author = "Zlatkov, B.S. and Nikolić, Maria Vesna and Aleksić, Obrad and Danninger, H. and Halwax, E.",
year = "2009",
abstract = "Barium hexaferrite permanent magnets were produced by powder injection molding. Starting barium hexaferrite powder was prepared from a Fe2O3 and BaCO3 powder mixture by calcination followed by milling. The feedstock for powder injection molding was prepared by mixing barium hexaferrite powder with a low viscosity binder. Magnetic alignment was achieved by applying a high intensity magnetic field to the melted feedstock during the injection process. Green samples (with and without magnetic alignment) were subjected to solvent debinding and subsequent thermal debinding followed by sintering. Sintering conditions were optimized in order to achieve a maximum energy product value. Magneto-crystalline aligning in barium hexaferrite was studied on both green and sintered samples using X-ray diffraction, scanning electron microscope (SEM) and magnetic measurements (hysteresis-graphs). All measurements were made both in a parallel and perpendicular direction to the aligning magnetic field. The obtained results confirmed magneto-crystalline alignment.",
publisher = "Elsevier Science Bv, Amsterdam",
journal = "Journal of Magnetism and Magnetic Materials",
title = "A study of magneto-crystalline alignment in sintered barium hexaferrite fabricated by powder injection molding",
pages = "335-330",
number = "4",
volume = "321",
doi = "10.1016/j.jmmm.2008.09.014"
}

Zlatkov, B.S., Nikolić, M. V., Aleksić, O., Danninger, H.,& Halwax, E.. (2009). A study of magneto-crystalline alignment in sintered barium hexaferrite fabricated by powder injection molding. in Journal of Magnetism and Magnetic Materials
Elsevier Science Bv, Amsterdam., 321(4), 330-335.
https://doi.org/10.1016/j.jmmm.2008.09.014

Zlatkov B, Nikolić MV, Aleksić O, Danninger H, Halwax E. A study of magneto-crystalline alignment in sintered barium hexaferrite fabricated by powder injection molding. in Journal of Magnetism and Magnetic Materials. 2009;321(4):330-335.
doi:10.1016/j.jmmm.2008.09.014 .

Zlatkov, B.S., Nikolić, Maria Vesna, Aleksić, Obrad, Danninger, H., Halwax, E., "A study of magneto-crystalline alignment in sintered barium hexaferrite fabricated by powder injection molding" in Journal of Magnetism and Magnetic Materials, 321, no. 4 (2009):330-335,
https://doi.org/10.1016/j.jmmm.2008.09.014 . .