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High frequency soft magnetic material composed of rare earth, iron and nitrogen, as well as composite material prepared by same and preparation methods thereof

A soft magnetic material, rare earth iron nitrogen technology, applied in the direction of magnetic materials, inorganic material magnetism, metal material coating technology, etc., can solve the problems of narrow frequency band, high complex magnetic permeability, low magnetic permeability, etc., and achieve wide resonance frequency, the effect of strongly absorbing microwaves

Inactive Publication Date: 2010-04-28
LANZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the ferrite materials widely used at present have the disadvantages of narrow frequency band, high density, and low complex permeability at high frequencies.
Although metal soft magnetic materials have high conductivity and are prone to decrease in high-frequency soft magnetic properties due to eddy current loss in electromagnetic waves, it is not conducive to obtaining high complex permeability at high frequencies, and there are relatively few materials in this regard. Especially at this stage, there are fewer soft magnetic materials suitable for 1G or even higher operating frequencies

Method used

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  • High frequency soft magnetic material composed of rare earth, iron and nitrogen, as well as composite material prepared by same and preparation methods thereof
  • High frequency soft magnetic material composed of rare earth, iron and nitrogen, as well as composite material prepared by same and preparation methods thereof
  • High frequency soft magnetic material composed of rare earth, iron and nitrogen, as well as composite material prepared by same and preparation methods thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment 1 (preparation of high frequency soft magnetic material)

[0022] Weigh 2.43g of praseodymium and 7.71g of iron, and melt them into ingots under the protection of argon. Annealed in a vacuum quartz tube at 1000 °C for one week. Grind the annealed ingot into particles of about 70 microns with an agate mortar, then wet-mill the particles with a planetary ball mill by adding 100ml of isopropanol and 0.2ml of phthalate coupling agent, the ball-to-material ratio is 20:1, and ball mill The speed is 200r / min, the ball milling time is set to 8h, and finally the sample is dried and nitrided at 480°C for 2h to obtain Pr 2 Fe 17 N 3-δ Material. Pressed into test sample by the same method as embodiment 1 and tested, its test result is referring to appendix image 3 And attached Figure 4 .

[0023] Depend on figure 1 It can be seen that the material obtained in this example is basically Pr with a small amount of α-Fe 2 Fe 17 N 3-δ sample. Depend on Figure 4...

Embodiment 2

[0024] Embodiment 2 (composite material preparation)

[0025] Add the nitride obtained in Example 1 into the titanate coupling agent diluted with isopropanol at a mass ratio of 100:1, stir and sonicate for 30 minutes, and dry. After ultrasonication, mix the sample with paraffin wax diluted with n-hexane at a volume ratio of 35:65. When the mixture is in a gel state, put it into a mold made of non-magnetic material (the inner diameter is 3.04mm, the outer diameter is 7.00mm) Inside, put the mold into the magnetic field for rotation orientation, the magnetic field size is 0.8-1.2T (Tesla), the rotation speed is about 120 rpm, and after about 30 minutes, put the mold in an oven to dry the sample , and finally cured at 140°C to obtain a ring-shaped test sample with an inner diameter of 3.04mm, an outer diameter of 7.00mm, and a thickness of 2-3mm. For sample test results, see attached figure 1 And attached figure 2 .

Embodiment 3

[0027] Embodiment 3 (preparation of high frequency soft magnetic material)

[0028] Weigh 2.43g of cerium and 7.71g of iron, and melt them into ingots under the protection of argon. Annealed in a vacuum quartz tube at 1000 °C for one week. Grind the annealed ingot into particles of about 70 microns with an agate mortar, then wet-mill the particles with a planetary ball mill by adding 100ml of isopropanol and 0.2ml of phthalate coupling agent, the ball-to-material ratio is 20:1, and ball mill The speed is 200r / min, the ball milling time is set to 8h, and finally the sample is dried and nitrided at 480°C for 2h to obtain Ce 2 Fe 17 N 3-δ Material. Add the coupling agent to the obtained material and mix it with paraffin wax diluted with n-hexane at a volume ratio of 35:65, press it into a ring-shaped sample with an inner diameter of 3.04mm, an outer diameter of 7.00mm, and a thickness of 2-3mm for testing. The test results are attached image 3 And attached Figure 4

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Abstract

The invention discloses a high frequency soft magnetic material and a composite material prepared by the same, as well as respective preparation methods of the high frequency soft magnetic material and the composite material. The high frequency soft magnetic material is composed of rare earth elements, iron and nitrogen, has a general formula of R2Fe17N3-delta, the direction of easy magnetization of the material is vertical to C axis, R is one of Y, Ce, Pr, Gd, Tb, Dy, Ho, Er, Tm, and Lu, or a combination of any two of the above rare earth elements, and dealt is larger than or equal to 0, and is smaller than or equal to 0.5.

Description

technical field [0001] The invention relates to a high-frequency soft magnetic material, a composite material prepared from the material, and a method for preparing the composite material from the material and the material. The high-frequency soft magnetic material of the present invention is an iron-based alloy containing rare earth and nitrogen; the composite material refers to a composite material with high-frequency soft magnetic characteristics made of the aforementioned high-frequency soft magnetic material and bonding material . Background technique [0002] Most of the high-frequency soft magnetic materials in the prior art are ferrite materials, as disclosed in Chinese invention patent 01120531.8. In the prior art, rare-earth iron-based soft magnetic metallic glass is also used, such as the content disclosed in the Chinese invention patent 02104348.5; the Chinese invention patent 99124006.5 discloses that in the Fe-Co-Ni alloy system, the chemical near the α-γ phas...

Claims

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Application Information

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IPC IPC(8): H01F1/147H01F1/22C22C38/00C22C33/04B22F9/04C23C8/00
Inventor 李发伸左文亮刘忻伊海波
Owner LANZHOU UNIVERSITY
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