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Sendust magnetic powder core

A magnetic powder core, iron-silicon-aluminum technology, which is applied in the field of magnetic powder cores to achieve the effects of improving uniformity and coordination, excellent comprehensive performance, and reducing lattice distortion and internal stress

Inactive Publication Date: 2015-07-22
ANHUI HUALIN MAGNETIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, sendust magnetic powder cores still have deficiencies in permeability, loss ratio, etc., and need to be continuously improved.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] According to the above-mentioned magnetic powder ratio, the sendust magnetic powder core is prepared according to the following steps;

[0023] S1: Powder pre-annealing; the magnetic powder is heat-treated at 1000 ° C for 1 h, and H 2 as a shielding gas;

[0024] S2: Screening; sieve the magnetic powder obtained in S1 through powder sieves with apertures of 147 μm, 104 μm, 61 μm, and 45 μm, and take 3% by weight fraction to pass through the powder sieve with apertures of 147 μm and not pass through the powder with apertures of 104 μm The sieved magnetic powder, 9% of the magnetic powder that passed through the powder sieve with the aperture of 104 μm and did not pass through the powder sieve with the aperture of 61 μm, 35% of the magnetic powder that passed through the powder sieve with the aperture of 61 μm and did not pass through the powder sieve with the aperture of 45 μm, 53% passed the powder sieve with the aperture of 45 μm The magnetic powder is mixed to obtain...

Embodiment 2

[0030] According to the above-mentioned magnetic powder ratio, the sendust magnetic powder core is prepared according to the following steps;

[0031] S1: Powder pre-annealing; the magnetic powder is heat-treated at 1000°C for 1.5h, and H 2 as a shielding gas;

[0032] S2: Screening; sieve the magnetic powder obtained in S1 through powder sieves with apertures of 147 μm, 104 μm, 61 μm, and 45 μm respectively, and take 4% by weight fraction to pass through the powder sieve with apertures of 147 μm and not pass through the powder with apertures of 104 μm The sieved magnetic powder, 8% of the magnetic powder passed through the powder sieve with the aperture of 104 μm and did not pass through the powder sieve with the aperture of 61 μm, 34% of the magnetic powder passed through the powder sieve with the aperture of 61 μm and did not pass through the powder sieve with the aperture of 45 μm, 54% passed through the powder sieve with the aperture of 45 μm The magnetic powder is mixed...

Embodiment 3

[0038] According to the above-mentioned magnetic powder ratio, the sendust magnetic powder core is prepared according to the following steps;

[0039] S1: Powder pre-annealing; the magnetic powder is heat-treated at 1000 ° C for 1 h, and H 2 as a shielding gas;

[0040]S2: Screening; sieve the magnetic powder obtained in S1 through powder sieves with apertures of 147 μm, 104 μm, 61 μm, and 45 μm, respectively, and take 5% by weight fraction to pass through the powder sieve with apertures of 147 μm and not pass through the powder with apertures of 104 μm The sieved magnetic powder, 7% of the magnetic powder that passed through the powder sieve with the aperture of 104 μm and did not pass through the powder sieve with the aperture of 61 μm, 33% of the magnetic powder that passed through the powder sieve with the aperture of 61 μm and did not pass through the powder sieve with the aperture of 45 μm, 55% passed through the powder sieve with the aperture of 45 μm The magnetic powd...

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PUM

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Abstract

The invention discloses a sendust magnetic powder core. Magnetic powder adopted for the sendust magnetic powder core comprises, by weight, 9-10% of Si, 5-6% of Al, and the balance Fe. Based on the ratio, the sendust magnetic powder core is prepared through powder pre-annealing, screening, passivation, insulation coating, compression moulding forming and heat treatment. According to the sendust magnetic powder core, the sendust magnetic powder core preparing technology is optimized, each preparation step is controlled, and excellent comprehensive performance is realized through the cooperation of all the steps.

Description

technical field [0001] The invention belongs to the technical field of magnetic powder cores, in particular to a sendust magnetic powder core. Background technique [0002] With the development of the economy, the requirements for high frequency, miniaturization and anti-electromagnetic interference of the inverter circuit are getting higher and higher. Metal magnetic powder core is a kind of soft magnetic material manufactured on the basis of powder metallurgy technology. Its advantages in magnetic properties make it widely used in many occasions. Among them, sendust magnetic powder cores have high cost performance and are favored by the market, and the market scale is growing rapidly. In the prior art, the sendust magnetic powder cores still have deficiencies in terms of magnetic permeability, loss ratio, etc., and need to be continuously improved. Contents of the invention [0003] In order to overcome the deficiencies of the prior art, the object of the present inven...

Claims

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Application Information

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IPC IPC(8): H01F1/147H01F1/24B22F1/02B22F3/16
Inventor 沈宏江
Owner ANHUI HUALIN MAGNETIC TECH
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