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A kind of metal soft magnetic composite material with high magnetic permeability and low loss and preparation method thereof

A soft magnetic composite material and composite material technology are applied in the field of high magnetic permeability and low loss metal soft magnetic composite materials and their preparation, and can solve the problems of low magnetic permeability and resistivity of alloys, and no obvious change in magnetic permeability, etc. Achieve the effect of high saturation magnetic induction, increase processing performance, and improve magnetic permeability

Active Publication Date: 2016-08-24
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Chinese patent 200710051454.1 discloses a manufacturing method of adding 0.3~0.5wt% Ti to the Fe-6.5% Si alloy. The magnetic powder core with higher magnetic permeability is obtained by optimizing the process, but by changing the Ti content, the magnetic Conductivity did not change significantly
However, Si was not added to the composition of the study, which would make the alloy's magnetic permeability and resistivity low.

Method used

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  • A kind of metal soft magnetic composite material with high magnetic permeability and low loss and preparation method thereof
  • A kind of metal soft magnetic composite material with high magnetic permeability and low loss and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] (1) Select the component Fe 97-x Si x P 1 V 2 Where x=3, 6, 9, 12, 15, industrial pure iron, polysilicon, phosphorus-iron alloy and alloy M are put into a vacuum induction furnace for smelting to obtain alloy ingots;

[0020] (2) The alloy ingot is mechanically crushed into alloy powder, and then sieved after high-temperature heat treatment at 600°C in a nitrogen or argon protective atmosphere, so that the mass percentage content of the alloy powder particle size composition is: +100 mesh accounts for 10%, -100~ +200 mesh accounts for 40%, -200~+300 mesh accounts for 40%, -300 mesh accounts for 10%;

[0021] (3) After the above alloy powder is passivated with 0.2wt% phosphoric acid solution, it is fully mixed with 1% silicone resin, and pressed into a powder core under a pressure of 1.3GPa;

[0022] (4) Put the pressed powder core in N 2 Heat treatment under protection, the nitrogen flow rate is 200mL / min, the heating rate is 30°C / min, the heat treatment temperatur...

Embodiment 2

[0026] Concrete implementation steps are identical with embodiment 1, and in an example of the present invention, composition selects Fe 86-y Si 12 P y al 2 , where y=0, 0.5, 1, 1.5, 2, 2.5, 3, 3.5, 4.

[0027]

[0028] It can be seen from the table that when the P content increases from 0 to 1.5at%, the effective magnetic permeability increases from 82 to 115, and the loss reaches the lowest 278KW / m 3 , continue to increase the P content, it will reduce the magnetic permeability of the soft magnetic composite material.

Embodiment 3

[0030] (1) Select the component Fe 84.5 Si 12 P 1.5 al 2 , putting industrial pure iron, polysilicon, phosphorus-iron alloy and alloy M into a vacuum induction furnace for smelting to obtain alloy ingots;

[0031] (2) The alloy ingot is mechanically crushed into alloy powder, and then sieved after high-temperature heat treatment at 600°C in a nitrogen or argon protective atmosphere, so that the mass percentage content of the alloy powder particle size composition is: +100 mesh accounts for 5%, -100~ +200 mesh accounts for 50%, -200~+300 mesh accounts for 35%, and -300 mesh accounts for 10%;

[0032] (3) After the above alloy powder is passivated with 0.2wt% phosphoric acid solution, it is fully mixed with 1% silicone resin, and pressed into a powder core under a pressure of 1.9GPa;

[0033] (4) Put the pressed powder core in N 2 Heat treatment under protection, the nitrogen flow rate is 200mL / min, the heating rate is 30°C / min, the heat treatment temperature is 600°C, and ...

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Abstract

The invention discloses a high-permeability low-loss metal soft-magnetism composite material and a preparing method thereof. The composite material is expressed through the atomic ratio satisfying the formula that Fe100-x-y-zSixPyMz, M is one or more of Cr, V, Al and Mn, and the subscripts x, y and z express the atomic percent of corresponding alloying elements and meet the conditions that x is greater than or equal to 2 and less than or equal to 15, y is greater than or equal to 0 and less than or equal to 5, and z is greater than or equal to 0 and less than or equal to 5. The obtained metal soft-magnetism composite material has the advantages of being high in permeability, low in loss, simple in process and low in cost and facilitating forming.

Description

technical field [0001] The invention relates to the field of magnetic materials, in particular to a metal soft magnetic composite material with high magnetic permeability and low loss and a preparation method thereof. Background technique [0002] Fe-Si soft magnetic alloy has excellent soft magnetic properties. When the content of silicon is 6.5wt%, its saturation magnetostriction coefficient tends to zero, which is beneficial to improve the magnetic permeability and reduce the coercive force. At the same time, the addition of silicon is also It can improve the resistivity of the alloy and reduce the loss. Therefore, it has become the most widely used and the largest amount of soft magnetic materials. With the rapid development of electronic technology, the requirements for high frequency, high power density, miniaturization and high anti-interference of electronic devices are increasing. However, the low resistivity of traditional Fe-Si alloys limits its use at high freq...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/147C22C33/02C22C38/38C22C38/24C22C38/18C22C38/12C22C38/06C22C38/04C22C38/34
Inventor 吴琛周晨晖严密
Owner ZHEJIANG UNIV