Abstract
Toroid-shaped soft magnetic powder cores (SMCs) were produced by cold pressing of the commercial sendust alloy powders. The characteristics of the commercial sendust alloy powder and the effect of compaction pressure on the magnetic properties, i.e., effective permeability μe, quality factor Q, DC-bias properties and volume power loss of sendust alloy powder cores were investigated. The results showed that the sendust alloy powder core with shaping pressure of 1932 MPa, annealing temperature of 953 K for 1 h and dielectric content of 0.96% presents the optimum magnetic properties with an effective permeability of 90, a total loss of 386 mW/cm3 at f=50 kHz and Bm=0.1 T, a DC-bias property of 64% at H=50 Oe.
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