Preparation method of Fe-based metal soft magnetic powder core

A soft magnetic powder core, iron-based metal technology, applied in the manufacture of inductors/transformers/magnets, magnetic materials, magnetic objects, etc., can solve the problems of low green body strength, unstable magnetic properties, and low pressing density of metal soft magnetic powder cores , to achieve uniform density distribution, easy green body demoulding, and the effect of expanding the field of use

Active Publication Date: 2015-12-23
有研增材技术有限公司
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Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art, solve the problems of low pressing density of metal soft magnetic powder cores, low green body strength and unstable magnetic properties, and provide a new method for preparing iron-based metal soft magnetic powder cores

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  • Preparation method of Fe-based metal soft magnetic powder core

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Embodiment 1

[0027] A kind of preparation method of novel FeSi6.5 metal soft magnetic powder core, this method is carried out by the following steps: first select the flaky metal FeSi6.5 powder (powder average particle size is 75 μm) prepared by high-energy ball milling as raw material, as figure 1 Shown is the SEM topography of the flaky powder used, and it was annealed at 750°C for 5 hours to form a (110) texture inside. The phosphoric acid solution that the concentration of magnetic powder weight 2wt% is 10% (mass percentage) joins in the middle of magnetic powder, and adds polyvinyl alcohol dispersant, and addition is 0.2% (mass percentage) of magnetic powder weight, and inorganic insulating agent SiO 2 、Al 2 o 3 and kaolin are added therein for insulating coating, and the addition amounts are respectively 0.5%, 0.8% and 0.45% of the weight of the magnetic powder. Dry the passivated and insulating powders at a temperature of 60° C. for 3 hours. The dried metal powder is pressed into...

Embodiment 2

[0029] A kind of preparation method of novel FeSi4Ni metal soft magnetic powder core, this method is carried out according to the following steps: first select sheet-shaped metal FeSi4Ni powder (average particle size of powder is 50 μm) as raw material, and carry out 800 ℃, 4.5h annealing treatment to it, and make A (110) texture is formed inside it. The phosphoric acid solution that the concentration of magnetic powder weight 2.5wt% is 10% (mass percentage) joins in the middle of magnetic powder, and adds polyvinyl alcohol dispersant, and addition is 1% (mass percentage) of magnetic powder weight, then inorganic insulating agent SiO 2, talcum powder, and kaolin are added therein for insulation coating, and the addition amounts are 0.7%, 0.6% and 0.25% of the weight of the magnetic powder respectively. Dry the passivated and insulating powders at a temperature of 100° C. for 2.5 hours. The dried metal powder is pressed into a magnetic powder core blank, and the release agent ...

Embodiment 3

[0031] A kind of preparation method of novel FeSi6Cr5 metal soft magnetic powder core, this method is carried out according to the following steps: firstly select flake metal FeSi6Cr5 powder (average particle size of powder is 100μm) as raw material, and it is annealed at 900 ℃, 3h, and make it A (110) texture is formed inside. The phosphoric acid solution that the concentration of magnetic powder weight 3wt% is 8% (mass percentage) joins in the middle of magnetic powder, and adds polyvinyl alcohol dispersant, and addition is 2% (mass percentage) of magnetic powder weight, and inorganic insulating agent SiO 2 , mica powder and kaolin are added therein for insulation coating, and the addition amounts are 0.3%, 0.7% and 0.55% of the weight of the magnetic powder respectively. Dry the passivated and insulating powders at a temperature of 120° C. for 1 hour. The dried metal powder is pressed into a magnetic powder core blank, and the release agent is zinc stearate powder, and the...

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Abstract

The invention relates to a preparation method of a Fe-based metal soft magnetic powder core, and belongs to the technical field of magnetic material preparation. The method comprises the following steps: with Fe-based flake-like metal soft magnetic powder as raw material powder, carrying out annealing treatment; carrying out passivation and insulated coating treatment on the annealed powder; carrying out drying treatment on the passivated and insulated powder; pressing the dried metal powder into a magnetic powder core blank, and adopting zinc stearate powder as a releasing agent; and carrying out annealing treatment on the molded magnetic powder core blank and spraying a layer of epoxy resin insulating paint on the surface of the magnetic powder core blank, so as to obtain the metal soft magnetic powder core. The density of the magnetic powder core prepared by the method is greatly improved; the density distribution is even; the magnetic powder core has relatively high compactness and good mechanical strength; and meanwhile, the magnetic powder core has relatively high magnetic conductivity and relatively low magnetic loss. In addition, the prepared magnetic powder core also has the characteristics of high magnetic conductivity, high quality factor and low loss.

Description

technical field [0001] The invention relates to a preparation method of a novel iron-based metal soft magnetic powder core, belonging to the technical field of magnetic material preparation. Background technique [0002] The metal magnetic powder core is a soft magnetic composite material prepared by powder metallurgy production process with metal or alloy powder as the raw material. Its magnetic and physical properties are obviously affected by the raw material powder, forming process and post-processing process. In order to improve the magnetic permeability, Q value and mechanical strength of the material, it is usually used to increase the density of the soft magnetic powder core compacted green body. To improve the density of the green body, the metal raw material powder used must have good formability and compression performance, that is, the powder can be easily molded into high-density components. [0003] The research of magnetic core components aims to develop and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F41/00H01F1/147H01F1/24B22F1/02B22F3/02B22F3/24
Inventor 贺会军盛艳伟赵新明张金辉边隽杰袁国良
Owner 有研增材技术有限公司
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