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Preparation method of magnetic-alloy-loaded porous carbon sphere composite wave-absorbing material

A technology of composite wave-absorbing materials and magnetic alloys, applied in chemical instruments and methods, and other chemical processes, can solve the problems of complex process, high cost, and low output, and achieve the effect of simple process, convenient operation, and uniform particle size distribution

Inactive Publication Date: 2016-08-03
XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] In order to solve the technical problems of low output, high cost and complicated process in the existing preparation method of composite wave-absorbing material, the present invention provides a composite porous carbon sphere loaded magnetic alloy with simple process, convenient operation and low requirements on production equipment. Preparation method of absorbing material

Method used

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  • Preparation method of magnetic-alloy-loaded porous carbon sphere composite wave-absorbing material
  • Preparation method of magnetic-alloy-loaded porous carbon sphere composite wave-absorbing material
  • Preparation method of magnetic-alloy-loaded porous carbon sphere composite wave-absorbing material

Examples

Experimental program
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Effect test

Embodiment 1

[0040] (1) Put porous carbon spheres with a particle size distribution of 0.5-2mm in a nitric acid solution with a mass fraction of 40-60%, the mass of carbon spheres to the volume ratio of nitric acid is 1g: 15-30ml, and then Stir and impregnate in a water bath for 10-12 hours, wash with deionized water repeatedly until neutral, then dry in an oven at 100-110°C for 12-24 hours;

[0041] (2) Dissolve iron salt and cobalt salt in deionized water to prepare a mixed precursor solution. The mass ratio of iron salt and cobalt salt to deionized water is 4-16g: 2-6g: 10-40ml;

[0042](3) Dip the porous carbon spheres into the above-mentioned precursor solution respectively, stir and impregnate for 12-24 hours, the volume ratio of the mass of the carbon spheres to the precursor solution is 1-3g: 9-20ml;

[0043] (4) The porous carbon spheres are filtered out from the solution, washed with 10-40ml deionized water, and filtered;

[0044] (5) Put the porous carbon spheres obtained in (4...

Embodiment 2

[0048] (1) Put porous carbon spheres with a particle size distribution of 0.5-2mm in a nitric acid solution with a mass fraction of 40-60%, the mass of carbon spheres to the volume ratio of nitric acid is 1g: 15-30ml, and then Stir and impregnate in a water bath for 10-12 hours, wash with deionized water repeatedly until neutral, then dry in an oven at 100-110°C for 12-24 hours;

[0049] (2) Dissolve iron salt and nickel salt in deionized water to prepare a mixed precursor solution. The mass ratio of iron salt and nickel salt to deionized water is 4-16g: 2-6g: 10-40ml;

[0050] (3) Dip the porous carbon spheres into the above-mentioned precursor solution respectively, stir and impregnate for 12-24 hours, the volume ratio of the mass of the carbon spheres to the precursor solution is 1-3g: 9-20ml;

[0051] (4) The porous carbon spheres are filtered out from the solution, washed with 10-40ml deionized water, and filtered;

[0052] (5) Put the porous carbon spheres obtained in (...

Embodiment 3

[0056] (1) Put porous carbon spheres with a particle size distribution of 0.5-2mm in a nitric acid solution with a mass fraction of 40-60%, the mass of carbon spheres to the volume ratio of nitric acid is 1g: 15-30ml, and then Stir and impregnate in a water bath for 10-12 hours, wash with deionized water repeatedly until neutral, then dry in an oven at 100-110°C for 12-24 hours;

[0057] (2) Take cobalt salt and nickel salt and dissolve them in deionized water respectively to prepare a mixed precursor solution. The mass ratio of cobalt salt and nickel salt to deionized water is 2-6g: 2-6g: 10-40ml;

[0058] (3) Dip the porous carbon spheres into the above-mentioned precursor solution respectively, stir and impregnate for 12-24 hours, the volume ratio of the mass of the carbon spheres to the precursor solution is 1-3g: 9-20ml;

[0059] (4) The porous carbon spheres are filtered out from the solution, washed with 10-40ml deionized water, and filtered;

[0060] (5) Put the porou...

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Abstract

The invention relates to a preparation method of a magnetic-alloy-loaded porous carbon sphere composite wave-absorbing material. The method comprises the following steps: 1) preparing a precursor solution containing two or more magnetic metal ion salts; 2) stirring the porous carbon spheres in the precursor solution for impregnation; 3) filtering out the porous carbon spheres, washing and drying; 4) calcining the dried porous carbon spheres in an inert atmosphere; and 5) cooling to room temperature in an inert atmosphere to obtain the magnetic-alloy-loaded porous carbon sphere composite wave-absorbing material. The iron salt / cobalt salt, iron salt / nickel salt and cobalt salt / nickel salt mixed precursor solution are introduced to the inside of the ducts of the carbon spheres by using the high specific area and strong adsorptivity of the porous carbon spheres through the capillary actions and are combined with the hydrophilic oxygen-containing functional group; and finally, the drying and sintering treatment in the inert atmosphere are performed to obtain the iron-cobalt / iron-nickel / cobalt-nickel-alloy-loaded porous carbon sphere composite material. The whole preparation process is simple in technique and convenient to operate, and has low requirements for the production equipment.

Description

technical field [0001] The invention relates to a preparation method of a composite wave-absorbing material, in particular to a preparation method of a porous carbon sphere composite radar wave-absorbing material loaded with a magnetic alloy. Background technique [0002] With the intensification of electronic warfare in modern warfare and the acceleration of informatization, the development of microwave-absorbing materials is moving in the direction of high performance. Judging from the current research results on absorbing materials, composite technology has become the preferred method to realize the design concept of "thin, light, wide, and strong" for new radar absorbing materials. Silicon fibers, carbon nanotubes, carbon black, conductive polymers and carbon fibers, etc.) are combined with traditional magnetic materials (such as magnetic metal micropowder and ferrite, etc.) with magnetic loss as the mainstay. On the one hand, the above-mentioned electric loss absorbing...

Claims

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Application Information

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IPC IPC(8): C09K3/00C22C38/10C22C38/08
CPCC09K3/00C22C38/08C22C38/10
Inventor 徐耀王浩静王红飞
Owner XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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