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A multi-level structure magnetic-dielectric composite wave-absorbing material and its preparation method

A composite wave absorbing material and composite material technology are applied in the multi-level structure magnetic-dielectric composite wave absorbing material. In the field of preparation of the material, the problems of insufficient microstructure design and insufficient wave absorbing performance can be solved, and the invention can achieve Excellent magnetic permeability, good material density and uniformity, simple equipment requirements

Inactive Publication Date: 2020-11-17
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a multi-level structure magnetic-dielectric composite wave-absorbing material, which solves the problem that the existing wave-absorbing material has insufficient microstructure design and cannot fully tap the wave-absorbing performance.

Method used

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  • A multi-level structure magnetic-dielectric composite wave-absorbing material and its preparation method
  • A multi-level structure magnetic-dielectric composite wave-absorbing material and its preparation method
  • A multi-level structure magnetic-dielectric composite wave-absorbing material and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] 1. Flake BaFe 12 o 19 Powder preparation:

[0035] 1-1, Mixing: Weigh 1.973gBaCO 3 , 9.581gFe 2 o 3 , 11.554gNaCl, the above three materials were mixed with 25g absolute ethanol and 32g zirconium balls in a 100mL polytetrafluoro ball mill jar and ball milled for 4 hours, and then dried after being taken out.

[0036] 1-2, the BaCO 3 , Fe 2 o 3 , put the NaCl mixture into a corundum crucible and cover it, put it into a muffle furnace and raise the temperature to 1000°C at 4°C / min, keep it warm for 8 hours, take it out and cool to room temperature.

[0037] 1-3, Cleaning: Wash the obtained black product with hot deionized water for 10 times repeatedly to remove the impurity ions introduced by NaCl, and at this time obtain small particle flake BaFe 12 o 19 The grain size is about 1-2 microns.

[0038] 1-4, flake BaFe 12 o 19 Coarsening: Take 1.111g of the powder obtained in step 3) and 41.646g of BaCl 2 and 15.968gFe 2 o 3 Mixed and calcined at 1150°C for 8h...

Embodiment 2

[0053] 1. Flake BaFe 12 o 19 The powder preparation method is the same as in Example 1.

[0054] 2.Co 2 Y(Ba 2 co 2 Fe 12 o 22 ) The preparation method of the powder is the same as in Example 1.

[0055] 3. Co. 2 Preparation of Y@PANI Composite

[0056] 3-1, Mixing: First, take 9g of prepared Co 2 Y powder in 100ml of 1mol / L hydrochloric acid solution, stirred for 30min; secondly, 4.5g of aniline monomer (PANI) was added to the suspension, and stirred for 30min again.

[0057] 3-2, Ice-bath polymerization: On the basis of step 3-1, add 100ml of 1.5mol / L ammonium persulfate solution, keep stirring in an ice-water bath, and react for 12h.

[0058] 3-3. Washing and drying: The reaction product was washed and collected by repeated suction filtration with deionized water, and dried in vacuum at 65° C. for 24 hours.

[0059] 4.Co 2 Synthesis of Y@PANI / BAM / PVB Composite

[0060] 4-1, preparation of slurry: weigh 8.0g Co 2 Y@PANI and 2.0g flake BaFe 12 o 19 , the two are...

Embodiment 3

[0065] 1. Flake BaFe 12 o 19 The powder preparation method is the same as in Example 1.

[0066] 2.Co 2 Y(Ba 2 co 2 Fe 12 o 22 ) The preparation method of the powder is the same as in Example 1.

[0067] 3. Co. 2 Preparation of Y@PANI Composite

[0068] 3-1, Mixing: First, take 9g of prepared Co 2 Y powder in 100ml 1mol / L hydrochloric acid solution, stirred for 30min; secondly, 3g of aniline monomer (PANI) was added to the suspension, and stirred for 30min again.

[0069] 3-2, Ice-bath polymerization: On the basis of step 3-1, add 100ml of 2mol / L sodium persulfate solution, keep stirring in an ice-water bath, and react for 12h.

[0070] 4.Co 2 Synthesis of Y@PANI / BAM / PVB Composite

[0071] 4-1, preparation of slurry: weigh 8.5g Co 2 Y@PANI and 1.5g flake BaFe 12 o 19 , the two were added to the mixed solution of 6g ethanol, 8g acetone and 0.6g triolein, and ball milled for 4 hours; then added 2.5g PVB, 1gPEG-600 and 0.4g dibutyl phthalate, again Ball mill for 2...

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Abstract

The invention discloses a multi-stage structure composite wave-absorbing material Co2Y@PANI / BaM-T / PVB. The Co2Y@PANI / BaM-T / PVB is formed by uniformly dispersing Co2Y@PANI composite powder and flaky BaFe12O19 powder into a polymer matrix PVB. The method disclosed by the invention utilizes a casting process to realize a multi-functional layered structure of Co2Y-type PANI powder and a flaky BaFe12O19 template in the PVB matrix, and the flaky BaFe12O19 powder is uniformly dispersed into the polymer matrix PVB, so that the material has higher wave-absorbing performance; and high-degree automationis easy to realize in the preparation process, the costs are low, compactness and uniformity of the material are good, and the preparation method is simple.

Description

technical field [0001] The invention belongs to the technical field of wave-absorbing materials, in particular to a multi-level structure magnetic-dielectric composite wave-absorbing material (Co 2 Y@PANI / BaM / PVB), also relates to the preparation method of this material. Background technique [0002] With the rapid development of communication technology and electronic industry, various electronic devices are widely used by people. While bringing convenience to people's life, they also generate a large amount of electromagnetic radiation. The resulting electromagnetic pollution has become a new source of pollution. Absorbing materials can effectively absorb electromagnetic radiation and reduce electromagnetic interference. In addition, in order to meet the needs of modern warfare, stealth technology has become the strategic focus of the world's military powers, and as the core part of stealth technology, the research and development and application of wave-absorbing materia...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L29/14C08K9/10C08K7/00C08K3/22
CPCC08K3/22C08K7/00C08K9/10C08K2003/2289C08K2201/01C08L29/14
Inventor 何立仲祖霆王建红郭毅
Owner XIAN UNIV OF TECH