Soft magnetic powder, preparation method therefor, and use thereof
AssigneeHengdian Group Dmegc Magnetics Co., Ltd
InventorsZhihong Jin, Xianghua Han, Jiangping Hu, Jun Xu
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Abstract
Soft magnetic powder, a preparation method therefor, and a use thereof. The preparation method comprises: (1) respectively independently performing surface silane coupling and silicon nitriding treatment on first magnetic powder, second magnetic powder, and third magnetic powder to obtain first magnetic powder, second magnetic powder, and third magnetic powder of which the surfaces are coated with compound films of —Si—N— chemical bonds; and (2) mixing the first magnetic powder, the second magnetic powder, and the third magnetic powder of which the surfaces are coated with the compound films of the —Si—N— chemical bonds, so as to obtain the soft magnetic powder.
Claims8
A preparation method of a soft magnetic powder, comprising the following steps:
- (1) subjecting a first magnetic powder, a second magnetic powder and a third magnetic powder to surface silane coupling treatment and silicon nitriding treatment independently to obtain a first magnetic powder coated with a compound film having —Si—N— chemical bonds, a second magnetic powder coated with a compound film having —Si—N— chemical bonds and a third magnetic powder coated with a compound film having —Si—N— chemical bonds, respectively;
- wherein the surface silane coupling treatment in step (1) comprises immersing the first magnetic powder, the second magnetic powder and the third magnetic powder in a silane coupling agent-acetone solution independently and separately;
- wherein the silicon nitriding treatment in step (1) comprises subjecting the first magnetic powder, the second magnetic powder and the third magnetic powder after the silane coupling treatment to annealing separately in a tubular annealing furnace;
- wherein a gas for an atmosphere of the annealing comprises a nitrogen-ammonia mixture;
- and
- (2) mixing the first magnetic powder coated with a compound film having —Si—N— chemical bonds, the second magnetic powder coated with a compound film having —Si—N— chemical bonds, and the third magnetic powder coated with a compound film having —Si—N— chemical bonds to obtain the soft magnetic powder.
Dependencies are inferred from the claim text.