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 measuremen...ts (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.
Keywords:
Strontium hexaferrite / PIM technology / Magnetic feedstock / Axial and diametrical magnetic alignment
Source:
Proceedings of the World Powder Metallurgy Congress and Exhibition, World PM 2010, 2010, 4
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 .
