Physical properties of permanent magnets for magnetic circuits of electric machines

Ślusarek, B.; Karbowiak, M.; Jankowski, B.; Kapelski, Dariusz; Przybylski, Marek

doi:10.14314/polimery.2013.127

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“…The new hard magnetic materials based on rare earth inter metallic compounds exhibit a considerably higher coercive force and energy density product compared to the traditional AlNiCo alloys and hard ferrites. The hexagonal ferrites based on BaO6Fe 2 O 3 have the magnetoplumbite structure and have high magneto crystalline anisotropic energy [2]. Magnetic properties of ferrite magnets are not very high, but their coercivity being higher than coercivity of Alnico magnets.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of Hybrid Bonded Magnet Ba-Ferrite/NdFeB with Epoxy Resin

Muljadi

Sardjono

Djauhari

et al. 2016

MSF

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Hybrid bonded magnet Ba-Ferrite/NdFeB with 5% wt Epoxy Resin (ER) as polymer binder hsa been developed with variations in BaFe12O19 to NdFeB weight ratio. The variation of the BaO6Fe2O3 : Nd-Fe-B weight ratio are 90%:10%; 80%:20%; 70%:30% and 60%:40%. The magnetic particle consist of Ba-Ferrite and NdFeB were mixed until homogenize and compacted by using hydraulic press machine with 8 Tonf force to form a disc shape sample. The disc sample was dried using vacuum dryer with 10 mm bar pressure at 80°C for one hour before being magnetized using impulse magnetizer. The best %wt composition ratio of Ba-Ferrite/NdFeB is 70%/30% and 60%/40%. The hybrid bonded magnetic properties at the best %wt composition ratio are: bulk density = 4.28-4.43 g/cm3, FM = 1057-1121 Gauss, Br = 3.46-3.70 kG, Hc = 3.25-3.70 kOe, and BHmax = 1.60-1.70 MGOe.

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Section: Introductionmentioning

confidence: 99%