Method for manufacturing [mu]26 composite magnetic powder core

A technology of magnetic powder core and alloy powder, which is applied in the field of manufacturing magnetic permeability μ26 composite magnetic powder core, to achieve the effect of smooth powder, low eddy current loss and low cost

Inactive Publication Date: 2017-11-21
天通(六安)新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Simple mechanical compounding, there is no way to make the magnetic powder core characteristics have better comprehensive performance

Method used

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  • Method for manufacturing [mu]26 composite magnetic powder core

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Such as figure 1 The preparation process flow chart of the composite magnetic powder core, according to the mass ratio of mechanical sendust: gas atomized sendust: gas atomized sendust = 1:2:1, adding 1.0% of the mass of the alloy powder The phosphating solution is passivated to form a coating film on the surface of the alloy powder. Add 3% silicon oxide powder, 1% aluminum oxide (or mica powder), 2% sodium silicate, and 4% to the alloy powder in turn. Mix deionized water evenly, dry and sieve, add 0.5% zinc stearate, and use φ27.00×φ14.70×11.20 (that is, a ring with an outer diameter of 27.00mm, an inner diameter of 14.70mm, and a thickness of 11.20mm) Magnetic core) is molded with a pressure of 1600MPa (16T / cm2), and the molded magnetic powder core is kept in a nitrogen or argon environment at 720°C for 60 minutes for stress relief heat treatment, and finally coated with epoxy resin powder on the magnetic powder The surface of the core is sufficient. The physical ch...

Embodiment 2

[0028] Such as figure 1 The preparation process flow chart of the composite magnetic powder core, the proportion of alloy powder is according to the mass ratio of mechanical iron silicon aluminum: gas atomized iron silicon: gas atomized iron nickel molybdenum = 1:2:1, adding the equivalent of alloy powder The phosphating solution with a mass of 1.0% is passivated to form a coating film on the surface of the alloy powder, and 4% silicon oxide powder, 1% aluminum oxide (or mica powder), and 1.5% sodium silicate are added to the alloy powder in sequence , mix 4% deionized water evenly and dry and sieve, add 0.5% zinc stearate, use φ27.00×φ14.70×11.20 (that is, the outer diameter is 27.00mm, the inner diameter is 14.70mm, and the thickness is 11.20mm The ring core) is molded with a pressure of 1600MPa (16T / cm2), and the molded magnetic powder core is kept in a nitrogen or argon environment at 720°C for 60 minutes for stress relief heat treatment, and finally coated with epoxy resi...

Embodiment 3

[0033] Such as figure 1 The preparation process flow chart of the composite magnetic powder core, the proportion of the alloy powder is according to the mass ratio of mechanical FeSiAl: gas atomized FeSi = 4:6, and the phosphating solution equivalent to 1.0% of the mass of the alloy powder is added for passivation. Chemical treatment, forming a coating film on the surface of the alloy powder, adding 5% silicon oxide powder, 1% aluminum oxide (or mica powder), 2% sodium silicate, and 4% deionized water to the alloy powder, mix evenly and Dry and sieve, add 0.5% zinc stearate, and use φ27.00×φ14.70×11.20 (that is, a ring-shaped magnetic core with an outer diameter of 27.00mm, an inner diameter of 14.70mm, and a thickness of 11.20mm) in a mold The pressure of 1600MPa (16T / cm2) is used for compression molding, and the formed magnetic powder core is kept in a nitrogen or argon environment at 700°C for 70 minutes for stress relief heat treatment, and finally coated with epoxy resin ...

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Abstract

The invention discloses a method for manufacturing a [mu]26 composite magnetic powder core. The technical scheme is as follows: after two or more alloy powders from mechanically crushed sendust, aerosolized sendust, aerosolized iron-silicon, aerosolized iron-nickel and aerosolized iron-nickel-molybdenum are selected and are fully mixed, phosphoric acid passivation treatment and drying are performed, then one or more from silicon oxide, aluminum oxide, calcium oxide and magnesia calcinata, sodium silicate, and deionized water are successively added to the alloy powders subjected to the passivation processing and drying for insulation coating, and afterwards, the [mu]26 composite magnetic powder core is prepared after press molding, heat treatment and surface coating. The alloy powders used in the method have the advantages of mature technology, stable performance and relatively low cost so that the prepared magnetic powder core has quite high cost performance and stability. Such oxides as the silicon oxide, the aluminum oxide, the magnesia calcinata and the like and such inorganic materials as the sodium silicate and the like are used for coating adhesion so that the obtained composite magnetic powder core has the advantages of high stability, high reliability, low cost, high safety and facilitated production.

Description

technical field [0001] The invention relates to the field of soft magnetic materials and powder metallurgy, in particular to a method for manufacturing a magnetic permeability μ26 composite magnetic powder core. This soft magnetic material is not only suitable for making high-current power inductors, PFC circuit inductors, DC / DC converters and Photovoltaic inverters, etc. Background technique [0002] With the high frequency, miniaturization, and high power density of power electronic equipment, traditional silicon steel sheets are gradually losing their advantages, and iron-based magnetic powder cores are a relatively reasonable choice for cost performance. Among them, amorphous magnetic powder core is an ideal material combining power consumption advantages and DC superposition characteristics, but it has not been used in large quantities due to various reasons such as materials, powder core technology, and reliability. [0003] Traditional magnetic powder cores cannot ba...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/147H01F1/22B22F1/02
CPCH01F1/14791H01F1/22B22F1/16
Inventor 顾忠雨李磊吴安琪
Owner 天通(六安)新材料有限公司
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