公开(公告)号：US20220351882A1

公开(公告)日：2022-11-03

申请号：US17812715

申请日：2022-07-14

Applicant: NICHIA CORPORATION

Inventor： Rieko YOSHIMOTO ,  Satoshi YAMANAKA ,  Shuichi TADA ,  Hideaki YOSHIWARA

IPC: H01F1/055 ,  B05D3/14 ,  B05D7/24 ,  H01F1/059 ,  C04B41/00 ,  C04B41/52 ,  C04B41/89

Abstract: Provided are a SmFeN magnetic powder which is superior not only in water resistance and corrosion resistance but also in hot water resistance, and a method of preparing the powder. The present invention relates to a method of preparing a magnetic powder, comprising: plasma-treating a gas; surface-treating a SmFeN magnetic powder with the plasma-treated gas; and forming a coat layer on the surface of the surface-treated SmFeN magnetic powder.

公开(公告)号：US20200098495A1

公开(公告)日：2020-03-26

申请号：US16582614

申请日：2019-09-25

Applicant: NICHIA CORPORATION

Inventor： Rieko YOSHIMOTO ,  Satoshi YAMANAKA ,  Shuichi TADA ,  Hideaki YOSHIWARA

IPC: H01F1/055 ,  B05D3/14 ,  B05D7/24 ,  C04B41/00 ,  C04B41/52 ,  C04B41/89 ,  H01F1/059

Abstract: Provided are a SmFeN magnetic powder which is superior not only in water resistance and corrosion resistance but also in hot water resistance, and a method of preparing the powder. The present invention relates to a method of preparing a magnetic powder, comprising: plasma-treating a gas; surface-treating a SmFeN magnetic powder with the plasma-treated gas; and forming a coat layer on the surface of the surface-treated SmFeN magnetic powder.