| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a dust core capable of obtaining better saturation magnetic flux density and DC superimposing characteristics than those of Ni-Mo-Fe system magnetic alloy for manufacturing a transformer core, chalk coil or magnetic head or the like by using magnetic alloy powder obtained at low costs in terms of material composition. <P>SOLUTION: Alloy powder composed of, for example, Fe-6Si-4Al is preliminarily heated to improve crystallinity. At the time of manufacturing dust powder in a public process, saturation magnetic flux density and DC superimposing characteristics beyond those of Ni base alloy such as conventional 50Ni-Fe system or 81Ni-2Mo-Fe system alloy can be obtained. This dust core is obtained by heating a molded body compression-molded from the mixed object of the alloy powder with Al3.0wt.% to 5.0wt.% and Si4.0wt.% to 7.0wt.% and residual part Fe as main components and insulating materials. <P>COPYRIGHT: (C)2004,JPO&NCIPI |
