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- W2050248829 abstract "Isotropic bulk nanocomposite permanent magnets were produced with strontium hexaferrite, SrO·6Fe2 O3 , and magnetite, Fe3 O4 , as the magnetically hard and soft components. A novels synthesis scheme based on the partial reduction of SrO·6Fe2 O3 was employed. In two parallel experiments, nano- and microcrystalline SrO·6Fe2 O3 particles were compacted into pellets along with a controlled, understoichiometric amount of potato starch as a reducing agent. The pellets were then sintered in a passive atmosphere. Based on XRD and room temperature magnetic hysteresis measurements, it was concluded that a fraction of the SrO·6Fe2 O3 input material had been reduced into Fe3 O4 . In comparison with pure SrO·6Fe2 O3 control pellets, these composites exhibited maximum energy product increases in excess of 5 % due to remanence boosting. The improvement of magnetic properties was attributed to an efficient exchange spring coupling between the magnetic phases. Interestingly, as the synthesis scheme also worked for microcrystalline SrO·6Fe2 O3 , the method could presumably be adapted to yield crystallographically oriented bulk nanocomposite magnets." @default.
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- W2050248829 date "2014-01-01" @default.
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- W2050248829 title "Iron oxide nanocomposite magnets produced by partial reduction of strontium hexaferrite" @default.
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- W2050248829 doi "https://doi.org/10.1051/epjconf/20147504007" @default.
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