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Ultra-micro capsule material, preparation method and application thereof

A capsule and ultra-micro technology, which is applied in the direction of microcapsule preparation, microsphere preparation, electrical components, etc., can solve the problems of insufficient complex dielectric constant value and low microwave absorption performance, and achieve excellent microwave absorption performance and low production cost , easy to amplify the effect of the experiment

Inactive Publication Date: 2018-07-31
NINGBO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In general, rare earth cobalt magnets are excellent candidate materials for strong microwave absorption in the S-band. The overall performance is still low, and it needs to be compounded with other materials to adjust its complex dielectric constant value

Method used

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  • Ultra-micro capsule material, preparation method and application thereof
  • Ultra-micro capsule material, preparation method and application thereof
  • Ultra-micro capsule material, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A kind of ultramicrocapsule material that present embodiment proposes, its structure is core-shell structure, by the rare earth cobalt magnet Pr 2 co 17 It consists of micron-sized particles and protonated polypyrrole as the outer shell covering the surface.

[0034] The preparation method of the ultramicrocapsule material of the present embodiment comprises the following steps:

[0035] Step 1: First prepare the rare earth cobalt magnet Pr 2 co 17 bulk body; then the rare earth cobalt magnet Pr 2 co 17 Lumps are crushed into rare earth cobalt magnets Pr 2 co 17 Powdery particles; due to the rare earth cobalt magnet Pr obtained after pulverization 2 co 17 The powder particle size is still large, so the rare earth cobalt magnet Pr 2 co 17 The powdered particles are ball milled and screened to obtain the rare earth cobalt magnet Pr 2 co 17 micron-sized particles. The micron-sized particles have high component purity, uniform size and good thermal stability. ...

Embodiment 2

[0045] A kind of ultramicrocapsule material that present embodiment proposes, its structure is core-shell structure, by the rare earth cobalt magnet Ce 2 co 17 It consists of micron-sized particles and protonated polypyrrole as the outer shell covering the surface.

[0046] The preparation method of the ultramicrocapsule material of the present embodiment comprises the following steps:

[0047] Step 1: First prepare the rare earth cobalt magnet Ce 2 co 17 block; then the rare earth cobalt magnet Ce 2 co 17 Lumps crushed into rare earth cobalt magnets Ce 2 co 17 Powdery particles; due to the rare earth cobalt magnet Ce obtained after pulverization 2 co 17 The powder particle size is still large, so the rare earth cobalt magnet Ce 2 co 17 Powdered particles are ball milled and screened to obtain rare earth cobalt magnets Ce 2 co 17 micron-sized particles. The micron-sized particles have high component purity, uniform size and good thermal stability.

[0048] In thi...

Embodiment 3

[0053] A kind of ultramicrocapsule material that present embodiment proposes, its structure is core-shell structure, is made of rare earth cobalt magnet Nd as inner core 2 co17 It consists of micron-sized particles and protonated polypyrrole as the outer shell covering the surface.

[0054] The preparation method of the ultramicrocapsule material of the present embodiment comprises the following steps:

[0055] Step 1: First prepare the rare earth cobalt magnet Nd 2 co 17 block; then the rare earth cobalt magnet Nd 2 co 17 Lumps crushed into rare earth cobalt magnets Nd 2 co 17 Powdered particles; due to the rare earth cobalt magnet Nd obtained after crushing 2 co 17 The powder particle size is still large, so the rare earth cobalt magnet Nd 2 co 17 Powdered particles are ball milled and screened to obtain rare earth cobalt magnets Nd 2 co 17 micron-sized particles. The micron-sized particles have high component purity, uniform size and good thermal stability.

[...

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Abstract

The invention discloses an ultra-micro capsule material, a preparation method and application thereof. The ultra-micro capsule material is of a core-shell structure; the core-shell structure is composed of rare earth cobalt magnet R2Co17 micron-order particles which are adopted a core and protonated polypyrrole which is adopted as a shell. The preparation process of the ultra-micro capsule material includes the following steps that: a rare earth cobalt magnet R2Co17 block is ground and ball-milled, so that rare earth cobalt magnet R2Co17 micron-order particles can be obtained; the rare earth cobalt magnet R2Co17 micron-order particles are added into protonated pyrrole monomer; and an ammonium persulfate oxidizing agent is added into the protonated pyrrole monomer, and a newly obtained mixture is stirred, so that the ultra-micro capsule material can be obtained. The high-complex magnetic permeability rare earth cobalt magnet and the high-complex permittivity protonated polypyrrole are composited, so that the wave absorbing property of the ultra-micro capsule material in a microwave S-band can be effectively improved.

Description

technical field [0001] The invention relates to a microwave absorbing material, in particular to an ultramicrocapsule material and its preparation method and application. Background technique [0002] With the rapid development of science and technology and the electronic industry, various digital and high-frequency electronic devices are becoming more and more widely used. Since they radiate a large number of electromagnetic waves of different frequencies into the space when they work, the problem of electromagnetic interference is becoming more and more serious. At the same time, people are in this environment for a long time, which will greatly affect people's health. In addition, the electromagnetic waves emitted by the radar can detect the existence of military targets in the area. Minimizing or eliminating the detection of military targets by radar is an important goal in the field of stealth technology. China, the United States, Russia, the United Kingdom and other c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05K9/00B01J13/02
CPCH05K9/0081B01J13/02
Inventor 姜林文杨姗姗郑梦瑶赵晗蕾郝佩茜
Owner NINGBO UNIV
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