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High-permeability ferrite magnetic material and preparation method thereof

A technology of magnetic materials and high magnetic permeability, applied in the direction of magnetic materials, inductance/transformer/magnet manufacturing, magnetic objects, etc., to achieve the effects of high practicability, wide application, and reasonable process design

Active Publication Date: 2022-06-10
NANTONG CHENGTAI MAGNETIC MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003]A wave-absorbing material refers to a class of materials that can absorb or greatly reduce the electromagnetic wave energy received by its surface, thereby reducing the interference of electromagnetic waves, and the research and development of ferrite is also for The direction of electromagnetic shielding has brought new research results, but the electromagnetic wave absorption effect of the wave-absorbing materials prepared by using ferrite still cannot meet our needs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Comparative example 1:

[0038] Take isocyanate-modified graphene oxide, ordinary carbon nanotubes and deionized water, ultrasonically disperse for 1-1.5h, then add compound A, ultrasonically oscillate for 20-25min, transfer to an autoclave, and treat at 180-200°C for 18- After 20 hours, take it out, wash it, and centrifugally dry it to obtain the finished product.

[0039] In this embodiment, the raw materials of each component of the magnetic material include, by weight, 15-25 parts of modified ferrite, 3-5 parts of modified carrier, 6-8 parts of isocyanate-modified graphene oxide, ordinary carbon 4-7 parts of nanotubes;

[0040] Comparative Example 1 is improved on the basis of Example 2. Common carbon nanotubes are added in Comparative Example 1, and the remaining process parameters and component contents are consistent with Example 2.

[0041] The sample prepared in Comparative Example 1 has a frequency bandwidth of 7.1-14.7 GHz in which the reflectance loss valu...

Embodiment 2

[0050] The sample prepared in Comparative Example 3 has a frequency bandwidth in which the reflectance loss value is lower than -10dB in 2-18GHz is 8.9-12.4GHz, and the minimum reflectance loss value can reach -45.2dB.

[0051] Comparative example 4:

[0052] Take acidified carbon nanotubes and anhydrous toluene, ultrasonically disperse them in a nitrogen environment for 0.5-1h, add toluene diisocyanate and tin catalyst in an oil bath at 60-65°C, stir and react for 8-10h, filter and wash with suction, and dry in vacuum to obtain isocyanate-modified permanent carbon nanotubes.

[0053] Take isocyanate-modified graphene oxide, isocyanate-modified carbon nanotubes and deionized water, ultrasonically disperse for 1-1.5h, then add compound A, ultrasonically oscillate for 20-25min, transfer to an autoclave, and treat at 180-200°C 18-20h, take out and wash, centrifuge and dry to get the finished product.

[0054] In this embodiment, the raw materials of each component of the magnet...

Embodiment 3

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PUM

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Abstract

The invention discloses a high-permeability ferrite magnetic material and a preparation method thereof, and the magnetic material comprises the following raw materials by weight: 15-25 parts of modified ferrite, 3-5 parts of a modified carrier, 6-8 parts of isocyanate modified graphene oxide, and 4-7 parts of isocyanate modified carbon nanotubes. The invention discloses a ferrite magnetic material with high magnetic conductivity and a preparation method thereof, the process design is reasonable, the component proportion is appropriate, the prepared ferrite magnetic material not only has excellent magnetic conductivity, but also can absorb electromagnetic waves in multiple dimensions so as to achieve an efficient absorption effect, and the prepared ferrite magnetic material has a good application prospect. The device can be widely applied to various electromagnetic wave radiation environments and has high practicability.

Description

technical field [0001] The invention relates to the technical field of ferrite, in particular to a ferrite magnetic material with high magnetic permeability and a preparation method thereof. Background technique [0002] With the progress and development of science and technology, electronic technology products gradually enter our life, which brings great convenience to our life. At the same time, electromagnetic wave pollution inevitably appears in our life. Studies have shown that, Long-term exposure to electromagnetic waves will cause great damage to the human body and easily cause neurological and genetic diseases. Therefore, in response to this situation, wave-absorbing materials have gradually become our research and development hotspot. [0003] Absorbing materials refer to a class of materials that can absorb or greatly reduce the electromagnetic wave energy received by its surface, thereby reducing the interference of electromagnetic waves, and the research and deve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/03H01F1/34H01F41/00
CPCH01F1/0315H01F1/344H01F41/00
Inventor 江阳张爱兰
Owner NANTONG CHENGTAI MAGNETIC MATERIAL TECH CO LTD
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