A kind of preparation method of fesi-based soft magnetic composite soft magnetic material
A composite soft magnetic and composite particle technology, which is applied in the fields of inorganic material magnetism, inductor/transformer/magnet manufacturing, metal processing equipment, etc., can solve the problem that the saturation magnetization cannot be maintained at a high level and the high temperature stability of soft magnetic composite materials Problems such as the high cost of amorphous and nanocrystalline soft magnetic materials need to be improved to achieve the effects of abundant raw materials, high saturation magnetization and permeability, and low coercive force and hysteresis loss
Active Publication Date: 2020-09-01
北京中磁新材科技有限公司
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Problems solved by technology
[0002] Traditional metal soft magnetic materials have serious magnetic loss. Although ferrite soft magnetic materials have low loss, their saturation magnetization is also low, and amorphous and nanocrystalline soft magnetic materials are expensive.
Although the particle-coated soft magnetic materials developed at present meet the application requirements to a certain extent, there are still deficiencies. In addition, the high temperature stability of soft magnetic composite materials needs to be improved
Method used
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Embodiment 1
[0019] High performance FeSi / γ-Fe 2 o 3 Composite soft magnetic material preparation method as attached figure 1 As shown, the specific steps are as follows:
[0020] In the first step, weigh 10g of FeSi alloy powder and place it in a 50mm*20mm*20mm magnetic ark at a vacuum of about 1.0×10 -3 In the quartz tube of Pa, the temperature was raised to 500°C at a heating rate of 6°C / min, and at the same time, Ar was passed in at a rate of 80mL / min for protection, and the high-purity O 2 and Ar mixed in a volume ratio of 3:7, then quickly passed into the tube furnace, so that the pressure in the tube was one atmospheric pressure, under this condition, it was kept for 60 minutes, and then cooled with the furnace, and XRD, XPS, SEM were carried out respectively. and EDS tests.
[0021] In the second step, weigh 0.03g of silane coupling agent and dissolve it in acetone, add the oxidized sample in the first step to the above mixed solution, stir thoroughly with a glass rod for 60min...
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The invention discloses a preparation method of a high-performance FeSi-based composite soft magnetic material, belonging to the technical field of magnetic material preparation. The present invention first generates a layer of γ-Fe on the surface of FeSi particles by controlling the oxidation conditions. 2 o 3 oxide layer, again in FeSi / γ‑Fe 2 o 3 The surface of the composite particles is coated with a certain amount of epoxy resin to form a γ‑Fe 2 o 3 And epoxy resin is a soft magnetic composite material with cladding (shell) core-shell structure. FeSi / γ-Fe prepared by the present invention 2 o 3 Composite soft magnetic materials have the characteristics of low coercive force, low magnetic loss, high saturation magnetization and high magnetic permeability. The invention has simple process, rich source of raw materials and is convenient for large-scale production.
Description
technical field [0001] The invention belongs to the technical field of magnetic material preparation, and relates to a preparation method of FeSi-based soft magnetic composite material. Applied in the field of soft magnetic materials, it has excellent soft magnetic properties. Background technique [0002] Traditional metal soft magnetic materials suffer from severe magnetic loss. Although ferrite soft magnetic materials have low loss, their saturation magnetization is also low, and amorphous and nanocrystalline soft magnetic materials are expensive. Although the currently developed particle-coated soft magnetic materials meet the application requirements to a certain extent, there are still some shortcomings. In addition, the high temperature stability of soft magnetic composite materials needs to be improved. In view of the low cost of soft magnetic composite materials, there is still a lot of room for development, so soft magnetic composite materials are an important di...
Claims
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IPC IPC(8): H01F1/33H01F41/00B22F1/02
CPCH01F1/33H01F41/00B22F1/16
Inventor 杨白郭瑞元李然
Owner 北京中磁新材科技有限公司