Magnet powders, bonded magnets, and electric motors
A technology of bonding magnets and motors, applied in the field of magnet powder, to achieve high coercive force and reduce the deterioration of magnetic properties
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Embodiment 1
[0044] A quenched ribbon was produced in the same manner as in Comparative Example 1, except that R in the raw material composition was set to R1=Nd and R2=Ho, and R2 / (R1+R2)=0.05 in atomic ratio. Then, the average primary particle diameter and the deviation Ra were obtained from the results of FE-SEM in the same manner as in Comparative Example 1. After pulverizing the quenched ribbon, the oxygen content was measured in the same manner as in Comparative Example 1, and HcJ and Br were obtained from the VSM measurement results. The results are shown in Table 1.
Embodiment 2
[0046] A quenched ribbon was produced in the same manner as in Comparative Example 1, except that R in the raw material composition was set to R1=Nd and R2=Ho, and R2 / (R1+R2)=0.1 in atomic ratio. Then, the average primary particle diameter and the deviation Ra were obtained from the results of FE-SEM in the same manner as in Comparative Example 1. After pulverizing the quenched ribbon, the oxygen content was measured in the same manner as in Comparative Example 1, and HcJ and Br were obtained from the VSM measurement results. The results are shown in Table 1.
Embodiment 3
[0062] A quenched ribbon was produced in the same manner as in Example 1 except that the raw material composition was set to 21at%R-69at%Fe-10at%B. Then, the average primary particle diameter and the deviation Ra were obtained from the results of FE-SEM in the same manner as in Comparative Example 1. After pulverizing the quenched ribbon, the oxygen content was measured in the same manner as in Comparative Example 1, and HcJ and Br were obtained from the VSM measurement results. The results are shown in Table 1.
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