| 摘要 |
PROBLEM TO BE SOLVED: To provide a composite sintered magnetic material solving the problem of weakness in the mechanical strength of the conventional powder magnetic core used for a transformer, a choke coil, a magnetic head or the like caused by the weakness of the bonding between metal powder and a layer of ferrite while solving the problem of low permeability in the conventional powder magnetic core. SOLUTION: The composite sintered magnetic material is composed of of at least one kind of metal powder 12 selected from among Fe, Fe-Si series, Fe-Ni series, Fe-Ni-Mo series and Fe-Si-Al series; and a layer 13 of ferrite formed of least one kind of ferrite powder 14 selected from among Ni-Zn series, Mn-Zn series and Mg-Zn series, and a diffusion layer 15 is formed between the metal powder 12 and the layer 13 for integrating them. COPYRIGHT: (C)2005,JPO&NCIPI |
