Preparation method for ferrosilicon aluminum magnetic powder core

An iron-silicon-aluminum and magnetic powder core technology is applied in the field of preparation of iron-silicon-aluminum magnetic powder cores, which can solve the problems of high manufacturing cost, poor product performance, low work efficiency, etc. cost effect

Inactive Publication Date: 2012-05-02
ZHEJIANG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The invention provides a method for preparing a sendust magnetic powder core, which solves the technical defects of poor performance, high manufacturing cost and low work efficiency in the prior art

Method used

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  • Preparation method for ferrosilicon aluminum magnetic powder core
  • Preparation method for ferrosilicon aluminum magnetic powder core
  • Preparation method for ferrosilicon aluminum magnetic powder core

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The sendust powder obtained by mechanical crushing (containing Si 9-10%, Al 5-6%, Mn 0.1-0.2%, Ti 0.3-0.6%, and the balance is Fe), according to the following particle size ratio: -200 Mesh-+400 mesh particles accounted for 60wt% of the total; the rest were -400 mesh particles accounted for 40wt% of the total. Add the hydrogen peroxide that concentration is 0.5% to carry out passivation treatment in the prepared powder, then add the acetone dilution of 0.4wt% magnetic powder adhesive (dilution ratio is 1: 19), 1250 purpose kaolin or talcum powder 0.1wt%, stir Uniform, insulating bonding coating. Then add 0.3wt% zinc stearate and 0.3wt% barium stearate (ie 1:1 mixing), mix evenly to make dry pressing molding powder. Place this powder on a dry pressing hydraulic press at 17T / cm 2 Under pressure, it is pressed into a ring-shaped blank sample (ie, a magnetic ring). The outer diameter of the magnetic ring is 26.90 mm, the inner diameter is 14.70 mm, and the height is 7.62 ...

Embodiment 2

[0037] The sendust powder obtained by mechanical crushing (containing Si 9-10%, Al 5-6%, Mn 0.1-0.2%, Ti 0.3-0.6%, and the balance is Fe), according to the following particle size ratio: -200 Mesh-+400 mesh particles accounted for 60wt% of the total; the rest were -400 mesh particles accounted for 40wt% of the total. In the prepared powder, adding concentration is 0.4% hydrogen peroxide to carry out passivation treatment, then add the acetone dilution of 0.45wt% magnetic powder adhesive (dilution ratio is 1: 19), 1250 mesh kaolin or talcum powder 0.12wt%, stir Uniform, insulating bonding coating. Then add 0.4wt% zinc stearate and 0.4wt% calcium stearate (i.e. 1:1 mixing), mix evenly to make dry pressing molding powder. Place this powder on a dry pressing hydraulic press at 17T / cm 2 Under pressure, it is pressed into a ring-shaped blank sample (ie, a magnetic ring). The outer diameter of the magnetic ring is 26.90 mm, the inner diameter is 14.70 mm, and the height is 7.62 mm....

Embodiment 3

[0041] The sendust powder obtained by mechanical crushing (containing Si 9-10%, Al 5-6%, Mn 0.1-0.2%, Ti 0.3-0.6%, and the balance is Fe), according to the following particle size ratio: -200 Mesh-+400 mesh particles accounted for 60wt% of the total; the rest were -400 mesh particles accounted for 40wt% of the total. In the prepared powder, adding concentration is 0.8% hydrogen peroxide to carry out passivation treatment, then add the acetone dilution of 0.25wt% magnetic powder glue (dilution ratio is 1: 19), 1250 mesh kaolin or mica powder 0.02wt%, stir Uniform, insulating bonding coating. Then add 0.1wt% zinc stearate and 0.1wt% barium stearate (ie 1:1 mixing), mix evenly to make dry pressing molding powder. Place this powder on a dry pressing hydraulic press at 17T / cm 2 Under pressure, it is pressed into a ring-shaped blank sample (ie, a magnetic ring). The outer diameter of the magnetic ring is 26.90 mm, the inner diameter is 14.70 mm, and the height is 7.62 mm. Place t...

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Abstract

The invention discloses a preparation method for a ferrosilicon aluminum magnetic powder core. The preparation method comprises the following steps of: (1) proportioning ferrosilicon aluminum powder according to a particle size; (2) adding a passivator into the prepared ferrosilicon aluminum powder for passivation treatment; (3) adding 0.25-0.6 percent magnetic powder adhesive diluted with acetone and 0.02-0.2 percent insulating agent, uniformly stirring and performing insulating adhesive covering; (4) adding 0.2-0.8 percent lubricating demolding agent, uniformly mixing, performing dry pressing and pressing into a blank; and (5) preserving heat of the blank in a protective atmosphere for 0.5-1 hour, air-cooling and spraying to obtain a target product. In the preparation method for the ferrosilicon aluminum magnetic powder core provided by the invention, hydrogen peroxide is used as the passivator, the cost is low, and environment is not polluted; a passivation film is uniform and clean and has stronger binding force with the magnetic powder adhesive; the prepared product has high tensile strength, low power consumption and good direct current biasing characteristic; and the product performance is higher than the industrial standard.

Description

technical field [0001] The invention relates to the technical field of manufacturing magnetic objects, in particular to a method for preparing a sendust magnetic powder core. Background technique [0002] Since the invention of sendust in Sendai, Japan, it has a development history of nearly 80 years. In the first half century of its development, due to the difficulty of the production process, it was not used much. In recent years, due to the soaring price of nickel and continuous breakthroughs in the production process of sendust magnetic powder cores, the excellent characteristics of sendust magnetic powder cores are gradually highlighted: as a new high-tech electronic energy-saving material, sendust magnetic powder cores are more efficient than iron powder cores. Energy savings (i.e. loss reduction) of up to 80%. Therefore, among the current soft magnetic powder cores of the three alloy series, sendust magnetic powder cores are used in the largest amount and can be app...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/22H01F3/00H01F41/02B22F3/00
Inventor 严密张念伟林坤陈秋宸
Owner ZHEJIANG UNIV
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