Abstract:Fe73.5Cu1Nb3Si15.5B7 nanocrystalline alloy tape with a thickness of 16-18 μm was wound into a 47mm×27mm×15mm nanocrystalline ring magnetic core. In addition to the alloy composition, the annealing process also directly affects the magnetic core properties. The magnetic field time during annealing is one of the key factors affecting the magnetic properties. The initial permeability μi and maximum permeability μm decrease monotonically with the increase of magnetizing time. The remanence Br and the rectangular ratio Br/Bs also show a monotonically decreasing trend. The coercivity Hc showed a monotonically increasing trend. The μ inflection point of magnetic permeability moves to the direction of high frequency, which indicates extending magnetic applied time at the same magnetic temperature is beneficial to the improvement of magnetic permeability at high frequency. And with the extension of magnetizing time, the iron loss, anti-deflection ability and stability in ESD test are also significantly improved.
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