Microstructures, physical and magnetic properties of BaFe12O19 permanent magnets with the addition of Al2O3-MnO

Barium hexaferrite (BaFe12O19) permanent magnets with the addition of Al2O3-MnO (0.12, 0.24; and 0.42 wt%) have been prepared by mechanical alloying method. The addition of Al2O3-MnO was done in order to improve the density and mechanical properties of the fabricated BaFe12O19 permanent magnet. Part...

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Bibliographic Details
Published in:Journal of physics. Conference series 2017-04, Vol.817 (1)
Main Authors: Setiadi, E A, Kurniawan, C, Sebayang, P, Ginting, M
Format: Article
Language:English
Subjects:
Additives
Aluminum oxide
Barium hexaferrite
Bulk density
Flux density
Magnetic properties
Magnetism
Manganese oxides
Mechanical alloying
Mechanical properties
Morphology
Pellets
Permanent magnets
Physics
Sintering (powder metallurgy)
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Summary:Barium hexaferrite (BaFe12O19) permanent magnets with the addition of Al2O3-MnO (0.12, 0.24; and 0.42 wt%) have been prepared by mechanical alloying method. The addition of Al2O3-MnO was done in order to improve the density and mechanical properties of the fabricated BaFe12O19 permanent magnet. Particle size of the as-mixed powder decreases Al2O3-MnO concentration increases. The as-mixed powders was then compacted into pellets and sintered at 1000 and 1100 °C for 2 hours. The crystalline phases and morphology of the pellets were observed using X-ray diffraction (XRD) and Scanning electron microscopy (SEM), respectively. It is found that the increase of the sample hardness has correlation with the bulk density of the samples. While, the flux density decreases linearly as Al2O3- MnO additives increases. The analysis of hysteresis curves classified the pellets as a hard magnet.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/817/1/012054