Patent ID: 10892090

Abstract:
A magnet core for low-frequency applications and method for producing a magnet core for low-frequency applications is provided. The magnet core is made of a spiral-wound, soft-magnetic, nanocrystalline strip. The strip essentially has the alloy composition FeRestCoaCubNbcSidBeCf, wherein a, b, c, d, e and f are stated in atomic percent and 0≤a≤1; 0.7≤b≤1.4; 2.5≤c≤3.5; 14.5≤d≤16.5; 5.5≤e≤8 and 0≤f≤1, and cobalt may wholly or partially be replaced by nickel. The magnet core has a saturation magnetostriction λs of λs<2 ppm, a starting permeability μ1 of μ1>100 000 and a maximum permeability μmax of μmax>400 000. In addition, a sealing metal oxide coating is provided on the surfaces of the strip.