| 摘要 |
Magnetic core from a spirally wound, soft magnetic, nanocrystalline tape, is claimed, where: the tape contains alloy composition (I); the magnetic core has a saturation magneto-striction of less than 2 ppm, an initial permeability of greater than 100000 and a maximum permeability of greater than 400000; and a sealing coating of metal oxide is arranged on the surfaces of the tape. Magnetic core from a spirally wound, soft magnetic, nanocrystalline tape, is claimed, where: the tape contains alloy composition of formula ((iron) l(cobalt) a(copper) b(niobium) c(silicon) d(beryllium) e(carbon) f) (I); the magnetic core has a saturation magneto-striction of less than 2 ppm, an initial permeability of greater than 100000 and a maximum permeability of greater than 400000; and a sealing coating of metal oxide is arranged on the surfaces of the tape. a : 0-1 atom%; b : 0.7-1.4 atom%; l : residual atom%; c : 2.5-3.5 atom%; d : 14.5-16.5 atom%; e : 5.5-8 atom%; and f : 0-1 atom%, where Co is optionally partially or completely replaced by Ni. Independent claims are included for: (1) a leakage circuit breaker comprising the magnetic core; and (2) preparing the magnetic core for low frequency applications of a spirally wound, soft magnetic, nanocrystalline tape, comprising providing a tape having a coating with a metal alkoxide solution and/or an acetyl acetone-chelate complex having a metal, and performing a subsequent heat treatment for nanocrystallization of the tape forms a sealing coating of a metal oxide, where during the heat treatment for nanocrystallization, the tape is adjusted to a saturation magneto-striction of less than 2 ppm. |
