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High-frequency soft magnetic material, composite material and preparation method

A magnetic composite material, high-frequency technology, applied in the direction of magnetic materials, inorganic materials, magnetic objects, etc., can solve the problems of unfavorable high complex magnetic permeability, low high-frequency soft magnetic performance, narrow frequency band, etc., and achieve high magnetic permeability. The effect of increasing the resonant frequency and widening the resonant frequency

Inactive Publication Date: 2012-02-15
LANZHOU UNIVERSITY
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Problems solved by technology

The widely used material is ferrite material, but the traditional ferrite material has the disadvantages of narrow frequency band, high density and low complex permeability at high frequency.
However, the existing metal soft magnetic materials are not conducive to obtaining high complex permeability at high frequencies because of their high conductivity and the eddy current loss in the electromagnetic wave, which easily leads to the reduction of high-frequency soft magnetic properties.

Method used

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  • High-frequency soft magnetic material, composite material and preparation method
  • High-frequency soft magnetic material, composite material and preparation method

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Embodiment Construction

[0012] The following are examples of the present invention.

[0013] Weigh 2.330g of neodymium, 6.473g of cobalt and 1.534g of iron, and melt them into ingots under the protection of argon. Placed in a vacuum quartz tube for homogenization heat treatment at 1000°C for one week. The homogenized heat-treated ingot is ground into particles of about 10-100 microns with an agate mortar. The grinding process is carried out under the protection of n-hexane liquid. The purpose of using n-hexane is to prevent oxidation, and its addition can cover The sample is enough, and the obtained material is measured in the X'Pert PRO diffractometer of Philips Company, and the results obtained by measuring its crystal structure are shown in figure 1 . Then add 60ml of n-hexane into the planetary ball mill to make the powder less than or equal to 5 microns, the mass ratio of ball and material during ball milling is 10:1, the ball milling speed is 200r / min, the ball milling time is set to 16h, and...

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Abstract

The invention discloses a metal high-frequency soft magnetic material, a composite material prepared from the material, the material and a preparation method for preparing the composite material from the material. The high-frequency soft magnetic material of the present invention is a powder composed of intermetallic compounds. This material is formed according to the ratio of the number of atoms of 2:17. Specifically, the material of the present invention is Nd2(CoFe)17 powder.

Description

technical field [0001] The invention relates to a high-frequency soft magnetic material, a composite material prepared from the material, the material and a method for preparing the composite material from the material. Background technique [0002] With the advancement of science and technology and the rapid development of the information industry, equipment (systems) such as computers, mobile phones, and networks have been widely used in the processing of information generation, transmission, reception, and storage, and these equipment will generate electromagnetic interference when they are used. and electromagnetic radiation. In order to effectively reduce and eliminate electromagnetic interference and electromagnetic radiation, materials with high complex permeability are required. The material widely used at present is ferrite material, but the traditional ferrite material has the disadvantages of narrow frequency band, high density, and low complex permeability at hi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/147H01F1/22B22F9/02B22F9/00
Inventor 李发伸伊海波刘忻左文亮
Owner LANZHOU UNIVERSITY
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