Abstract
Fe-based amorphous magnetic alloy powders with a composition of (Fe0.76Si0.09B0.1P0.05)99Nb1 were first prepared by water atomization, and then amorphous magnetic powder cores were produced from a mixture of the amorphous alloy powders with diameters of below 75μm and different volume of insulation and bonding materials by mold compacting with a compact pressure of 2200MPa at room temperature. The amorphous magnetic cores exhibit superior DC-bias properties and excellent soft magnetic properties after appropriate heating treatment. The DC-bias properties of the present amorphous magnetic cores just decrease 15% as the external field increases to 100Oe. Meanwhile, it also exhibits a high permeability of 56 at 1MHz and a low core loss of 451W/kg at Bm=0.1T and f=100kHz. The present Fe-based amorphous magnetic powder cores with superior DC-bias properties are a potential candidate for a variety of industrial applications.
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