The influence of composition of magnetic flux density

In soft magnetic alloy, Fe is to provide the main components of the magnetic. In order to obtain high saturation magnetic flux density, expect Fe content as large as possible. Fe content is 70 atom % or higher, however, will result in fairly low resistivity. On the other hand, the Fe content is lower than the lower limit of Fe content in the range of the present invention, although can obtain high resistivity, but may lead to quite low saturation magnetic flux density. Rare earth elements (expressed in symbol M One of the following elements: belongs to the periodic table 3 group a Sc and Y, and lanthanide elements, including La, Ce, Pr, Nd, Pm, Sm, Eu Gd, Td, Dy, Ho, Er, Tm, Yb, Lu, etc. ) And symbol M & # 39; Said elements ( Belongs to the periodic table 4 a, 5 a and 6 a set of one of the elements, such as Ti) Zr and Hf, V, Nb, Ta, and W) For soft magnetic performance is more important. These elements are easy to combine with oxygen to form oxides. Through adjusting the content of the oxide, can realize the increase of resistivity. Using the composition of the present invention, can get 400-2. 0×105μΩ。 Cm high resistivity. By obtaining high resistivity, can reduce the loss caused by eddy current, reduces the permeability of high frequency range, and the increase of frequency characteristic can be achieved. It should be noted that Hf are credited with the ability of magnetostriction. In 30020-600 ℃ temperature annealing was carried out on the alloy membrane, can the internal stress in the alloy membrane and achieve good soft magnetic properties.