Soft magnetic powder, soft magnetic powder heat treatment method, soft magnetic material, dust core, and dust core manufacturing method
A heat treatment method and powder magnetic core technology are applied in the fields of magnetic materials, magnetic cores/yokes, inductors/transformers/magnets, etc., which can solve the problems of easy reduction of saturation magnetization and achieve maintenance of saturation magnetization and excellent electric current. The effect of insulation
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Embodiment 1
[0135] The FeSiCr alloy powder 1 obtained in Comparative Example 1 was heated to 800°C at a heating rate of 10°C / min in a nitrogen atmosphere containing 100 ppm of oxygen using a furnace, and heat-treated at 800°C for 960 minutes to obtain FeSiCr alloy powder 3. For this alloy powder 3, using the same method as Comparative Example 1, the composition (the amount of Fe, Si, Cr and oxygen content), particle size distribution, BET specific surface area, tap density, powder compact resistance and magnetic properties were obtained, Furthermore, X-ray diffraction (XRD) measurement and ESCA analysis were performed. The results are shown in Table 2 and Table 3 below. In addition, the results of ESCA analysis (ratio of the atomic concentration of Si and Fe up to a depth of 300 nm) are shown together with the results of Comparative Example 1 in figure 1 .
Embodiment 2
[0137] For the FeSiCr alloy powder 1 obtained in Comparative Example 1, using the same furnace as in Example 1, in a nitrogen atmosphere containing 100 ppm of oxygen, it was heated to 500° C. at a rate of temperature increase of 10° C. / min, and 960 minutes at 500° C. Heat treatment to obtain FeSiCr alloy powder 4 . For this alloy powder 4, using the same method as Comparative Example 1, the composition (the amount of Fe, Si, Cr and oxygen content), particle size distribution, BET specific surface area, tap density, powder compact resistance and magnetic properties were obtained, Furthermore, X-ray diffraction (XRD) measurement and ESCA analysis were performed. The results are shown in Table 2 and Table 3 below.
Embodiment 3
[0139] For the FeSiCr alloy powder 1 obtained in Comparative Example 1, using the same furnace as in Example 1, in a nitrogen atmosphere containing 100 ppm of oxygen, it was heated to 800° C. at a rate of temperature increase of 10° C. / min, and 20 minutes at 800° C. Heat treatment to obtain FeSiCr alloy powder 5 . For this alloy powder 5, using the same method as Comparative Example 1, the composition (the amount of Fe, Si, Cr and oxygen content), particle size distribution, BET specific surface area, tap density, powder compact resistance and magnetic properties were obtained, Furthermore, X-ray diffraction (XRD) measurement and ESCA analysis were performed. The results are shown in Table 2 and Table 3 below.
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