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Soft magnetic composite powder and magnetic powder core preparation method thereof

A soft magnetic composite and composite powder technology, applied in the direction of magnetic materials, magnetic objects, metal processing equipment, etc., can solve the problems of high magnetic loss of iron-silicon powder cores, large-scale promotion restrictions, and high material costs, and achieve high cost performance and good performance. Comprehensive magnetic properties, improved bulk density and flowability

Inactive Publication Date: 2016-12-14
BEIJING COMPO ADVANCED TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the core magnetic loss of iron silicon powder is high, and the heat generation is obvious in the application process of the device, and its low price becomes the primary factor for its selection.
The iron-nickel powder core is currently the best magnetic core for high-current and low-loss applications, but because it contains precious metal nickel, the material cost is relatively high, and large-scale promotion is restricted by cost.

Method used

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  • Soft magnetic composite powder and magnetic powder core preparation method thereof
  • Soft magnetic composite powder and magnetic powder core preparation method thereof
  • Soft magnetic composite powder and magnetic powder core preparation method thereof

Examples

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Embodiment 1

[0038] A kind of low-cost, low-loss FeNi50 soft magnetic composite powder and its magnetic powder core preparation method, the method is carried out according to the following steps:

[0039] First, according to the magnetic characteristics, the saturation magnetic induction of the material is required to be 1.6T, the DC bias characteristic is 82% (100Oe), and the magnetic loss is 3 . Through the linear calculation and composition optimization of the magnetic properties of different soft magnetic materials, it is necessary to select water atomized FeNi50, FeSi3.5 and FeSi9.5Al5.5, rapid quenching Fe-based nanocrystalline powder and MnZn ferrite as raw materials. The mass ratio is 55%:25%:4%:15%:1%. Among them, FeNi50 powder is preferably -100 / 150 mesh, FeSi9.5Al5.5 powder particle size is 200 / 325 mesh, FeSi3.5 and Fe-based amorphous powder particle size is -200 / 325 mesh and -500 mesh, MnZn ferrite Particle size 2 As an insulating agent, the mass proportions are respectively 0...

Embodiment 2

[0042] A kind of high DC bias characteristic FeSiAl soft magnetic composite powder and its magnetic powder core preparation method, the method is carried out according to the following steps:

[0043] First of all, according to the magnetic characteristics, the saturation magnetic induction of the material is required to be 1.2T, the DC bias characteristic is 55% (100Oe), and the magnetic loss is 3 . Through the linear calculation and composition optimization of the magnetic properties of different soft magnetic materials, it is necessary to select water atomized FeNi50, gas atomized FeSi3.5 and crushed FeSi9.5Al5.5 powders as raw materials, and the mass ratio of the above powders is 5%:15% :80%. Among them, the preferred FeNi50 and FeSi3.5 powders are -325 mesh and -500 mesh, and the crushing FeSiAl powder is -150 mesh. Shaping treatment is carried out for FeSiAl and water atomized FeNi50 powders by the crushing method, the feeding rate of the jet mill is 100Kg / h, and the tr...

Embodiment 3

[0045] A kind of low-loss FeSi6.5 soft magnetic composite powder and its magnetic powder core preparation method, the method is carried out according to the following steps:

[0046] First, according to the magnetic characteristics, the saturation magnetic induction of the material is required to be 1.5T, the DC bias characteristic is 70% (100Oe), and the magnetic loss is 3 According to the performance requirements of different soft magnetic materials, through the linear calculation and composition optimization of the magnetic properties of different soft magnetic materials, it is necessary to select water atomized FeNi50, gas atomized FeSi6.5 and crushing method FeSi9.5Al5.5 and MnZn ferrite powder as raw materials, the above powder The mass ratio is 5%:80%:13%:2%. Among them, the preferred FeNi50 and FeSi6.5 powders are -325 mesh and -200 mesh, the crushing method FeSiAl powder is -150 mesh, and the particle size of MnZn ferrite powder is 2 As an insulating agent, add mass pr...

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Abstract

The invention relates to soft magnetic composite powder and a magnetic powder core preparation method thereof, and belongs to the technical field of powder metallurgy and magnetic materials. According to different magnetic performance characteristics of metal soft magnetic powder, amorphous and nano-crystalline powder and ferrite powder, magnetic performances are linearly calculated and optimally designed, so that the requirements of different magnetic properties are met. Besides, powder sizes are calculated and coordinately designed, the powder is shaped, screened, annealed, coated in an insulated manner and mixed, and the powder with different components is respectively passivated and insulated, weighed according to weight ratio and uniformly mixed to form the composite powder. The prepared soft magnetic composite powder is regular in morphology and good in dispersity and has good apparent density and flowability. In addition, the magnetic performance of a magnetic powder core prepared from the soft magnetic composite powder can be calculated and designed as required, the magnetic powder core has high cost performance and good comprehensive magnetic performance, and the blank of the performance and application of an existing magnetic powder core is effectively filled in.

Description

technical field [0001] The invention relates to a soft magnetic composite powder and a method for preparing a magnetic powder core thereof, belonging to the technical fields of powder metallurgy and magnetic materials. Background technique [0002] Metal magnetic powder cores have special functions of magnetoelectric conversion and energy storage filtering, and are an important part of soft magnetic materials. At present, the soft magnetic powder cores used in the market mainly include metal magnetic powder cores (iron powder cores, iron silicon powder cores, sendust powder cores, iron nickel powder cores and iron nickel molybdenum powder cores), amorphous, nanocrystalline and iron oxide powder cores. Body powder core. As the application conditions of soft magnetic materials tend to require high power and high current, metal magnetic powder core products with high saturation magnetic induction, high magnetic permeability, low loss, high DC bias characteristics and good temp...

Claims

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Application Information

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IPC IPC(8): H01F1/147H01F1/24B22F1/00
CPCB22F1/0003H01F1/14791H01F1/24B22F1/14B22F1/142
Inventor 贺会军盛艳伟赵新明张少明张金辉胡强安宁张品袁国良
Owner BEIJING COMPO ADVANCED TECH
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